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TGS73 1
TGS73
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WIKA · Temperature measurement · Family TGS

Gas-actuated thermometer with switch contacts

Gas-actuated thermometer with switch contact, stainless steel version for industrial process control and regulation, suitable for machine building, plant, tank, and equipment manufacturing.
Range
-80…700 °C
Output
magnetic snap-action contacts
Accuracy
Class 1 per DIN 16196 at 23 °C ±10 °C ambient temperature
Protection
IP65
DIN 16196CERoHSATEXIECEx
Price
On request
Depends on configuration
Request a quote
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Description

Wherever the process temperature has to be indicated on-site or in places that are difficult to access and, at the same time, circuits need to be switched, the gas-actuated thermometer with switch contacts finds its use.

Due to the wide variety of possible designs, the model TGS73 gas-actuated thermometers can be perfectly adapted to any process connection or location. With the adjustable stem and dial version, the case can be adjusted precisely to the desired viewing angle.

With the contact bulb version (without direct contact with the medium), the temperature can be measured and switched even when the pipe diameter is extremely small. The contact bulb is intended for external mounting on pipes and tanks. When mounting this thermometer version, it must be ensured that the contact bulb is in contact with the measuring location over its complete length.

Fig. top: lower mount

Fig. bottom: back mount

Switch contacts (electrical alarm contacts) make or break circuits dependent upon the pointer position of the indicating measuring instrument. The switch contacts are adjustable over the full measuring range. The instrument pointer (actual value pointer) moves freely across the entire scale range, independent of the setting. The set pointer can be adjusted via the window using a removable adjustment key (mounted on the cable socket). Switch contacts consisting of several contacts can also be set to a single set point. Contact actuation is made when the actual value pointer travels beyond or below the desired set point.

As switch contacts, magnetic snap-action contacts, inductive contacts and electronic contacts are available. Inductive contacts can be used in hazardous areas. For triggering programmable logic controllers (PLC), electronic contacts can be used.

Special features

  • Instruments meet the highest standards of measurement technology
  • Case and stem from stainless steel
  • For external mounting on pipes and tanks
  • Instruments with inductive contacts for use in hazardous areas
  • Instruments with contacts for PLC applications
Identification
ModelTGS73
Product familyTGS
Subcategorygas-actuated thermometer with switch contact
Measuring range
Temperature ranges−80…+60 °C · −60…+40 °C · −40…+60 °C · −30…+50 °C · −30…+70 °C · −20…+40 °C · −20…+60 °C · −20…+80 °C · −20…+100 °C · −20…+120 °C · +0…+60 °C · +0…+80 °C · +0…+100 °C · +0…+120 °C · +0…+150 °C · +0…+160 °C · +0…+200 °C · +0…+250 °C · +0…+300 °C · +0…+400 °C · +0…+500 °C · +0…+600 °C · +0…+700 °C
Accuracy
Accuracy classClass 1 per DIN 16196 at 23 °C ±10 °C ambient temperature
Process conditions
Process connection
M18 x 1.5M8 x 1.5M24 x 1.5G ½ BG ¾ B½ NPT¾ NPTG1/2BG3/4B1/2NPT3/4NPTM20x1.5
Electrical characteristics
Output signalmagnetic snap-action contacts · inductive contacts · electronic contacts · magnetic snap-action contact · inductive contact
Electrical connectionM20x1.5
Materials
Probe materialStainless steel 316
Operating environment
Ambient temperature+0…+50 °C
IP ratingIP65
Certifications and approvals
Certifications
DIN 16196CERoHS
Explosion protection
instruments with inductive contacts for use in hazardous areasATEXIECEx
Additional details
Sensor typegas-pressure
Sensor classClass 1 per DIN 16196
Probe length200 mm
Probe diameter6 mm
ThermowellNo
Datasheet languagesEN, DE
Tables from datasheet
Basic information
StandardDIN 16196
Nominal size in mm["]■ 100 [4] ■ 160 [6]
WindowLaminated safety glass, polycarbonate
Connection location■ Back mount (axial) ■ Lower mount (radial) ■ Back mount, adjustable stem and dial ■ Version with capillary
Connection design→ For drawings, see page 16
SStandard (threaded connection) 1)
1Plain stem (without thread)
2Male nut
3Union nut
4Compression fitting (sliding on stem)
5Union nut and loose threaded connection
6Compression fitting (can be adjusted on either capillary or spiral protective sleeve)
7Compression fitting on the case 1)
'Adjustable stem and dial' case versionSwivelling 90° and rotatable 360°
Damping, case filling■ Without ■ With liquid damping
Material (non-wetted)
Case, bayonet bezelStainless steel 304
PointerAluminium, black, micro adjustment
Articulated joint 'adjustable stem and dial'Stainless steel 304
DialAluminium (white)
Measuring element
Type of measuring elementGas-pressure inert gas filling, physiologically safe
Working range
Constant loading (1 year)Measuring range per DIN 16196
Short time (max. 24 h)Scale range per DIN 16196
Capillary
DiameterØ2mm[0.08 in]
Spiral protective sleeveØ7mm[0.28 in]
LengthCapillary without spiral protective sleeveMax. 60 m[197 ft]
Capillary with spiral protective sleeveMax. 40 m[131 ft]
Capillary with spiral protective sleeve and PVC coatingMax. 20 m[66 ft]
Minimum bending radiusCapillary without spiral protective sleeve6 mm[0.24 in]
Capillary with spiral protective sleeve20 mm[0.79 in]
Capillary with spiral protective sleeve and PVC coating30 mm[1.18 in]
Material (in contact with the environment)Stainless steel 316
Mounting options■ Surface mounting flange, stainless steel ■ Instrument mounting bracket, aluminium die-casting ■ Panel mounting flange, stainless steel
Contact bulb
Dimensions120 x 22 x 12 mm[4.72 x 0.87 x 0.47 in]
Mounting types■ Mounting on pipes ■ Mounting on tanks
Measuring element
Material (non-wetted)Stainless steel 316
Accuracy specifications
AccuracyClass 1 per DIN 16196 at 23 °C ±10 °C ambient temperature
View all (20)
Scale range in °CMeasuring range 1) in °CScale interval in °CError limit per DIN 16196 in °C
-80 ... +60-60 ...+4023.0
-60 ... +40-50 ...+3011.5
-40 ... +60-30 ...+5011.5
-30 ... +50-20 ...+4011.5
-30 ... +70-20 ...+6011.5
-20 ... +40-10 ...+3011.5
-20 ... +60-10 ...+5011.5
-20 ... +80-10 ...+7011.5
-20 ... +100-10 ...+9011.5
-20 ... +1200 ... 10023.0
0 ... 6010 ... 5011.5
0 ... 8010 ... 7011.5
0 ... 10010 ... 9011.5
0 ... 12010 ... 11023.0
0 ... 15020 ... 13023.0
0 ... 16020 ... 14023.0
0 ... 20020 ... 18023.0
0 ... 25030 ... 22053.75
0 ... 30030 ... 27057.5
0 ... 40050 ... 35057.5
0 ... 50050 ... 45057.5
0 ... 600100 ... 5001015.0
0 ... 700100 ... 6001015.0
Further details on: scale range
Unit■ °C ■ °F ■ °C/°F (dual scale)
Dial
Scale graduation■ Single scale ■ Dual scale
Scale colourSingle scaleBlack
Dual scaleRed
→ Other colours on request
Pointer
VersionAdjustable pointer
Design1 2and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °CMinimum insertion length in mm[in]
Back mount and lower mount
-80 ... +6095 [3.74]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]110 [4.33]75 [2.95]75 [2.95]
-60 ... +40105 [4.13]70 [2.76]60 [2.36]105 [4.13]70 [2.76]60 [2.36]100 [3.74]65 [2.56]60 [2.36]120 [4.72]85 [3.35]75 [2.95]
-40 ... +60105 [4.13]70 [2.76]60 [2.36]105 [4.13]70 [2.76]60 [2.36]100 [3.74]65 [2.56]60 [2.36]120 [4.72]85 [3.35]75 [2.95]
-30 ... +50125 [4.92]75 [2.95]60 [2.36]125 [4.92]75 [2.95]60 [2.36]120 [4.72]70 [2.76]60 [2.36]140 [5.51]90 [3.54]75 [2.95]
-30 ... +70105 [4.13]70 [2.76]60 [2.36]80 [3.15]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]95 [3.74]75 [2.95]75 [2.95]
-20 ... +40135 [5.31]95 [3.74]65 [2.56]115 [4.53]70 [2.76]60 [2.36]125 [4.92]85 [3.35]60 [2.36]125 [4.92]85 [3.35]75 [2.95]
-20 ... +60125 [4.92]85 [3.35]60 [2.36]125 [4.92]85 [3.35]60 [2.36]120 [4.72]80 [3.15]60 [2.36]140 [5.51]100 [3.74]75 [2.95]
-20 ... +80105 [4.13]70 [2.76]60 [2.36]105 [4.13]70 [2.76]60 [2.36]100 [3.74]65 [2.56]60 [2.36]120 [4.72]85 [3.35]75 [2.95]
-20 ... +100100 [3.74]65 [2.56]60 [2.36]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
-20 ... +120100 [3.74]65 [2.56]60 [2.36]75 [2.95]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 60155 [6.10]95 [3.74]75 [2.95]155 [6.10]95 [3.74]75 [2.95]150 [5.91]90 [3.54]70 [2.76]170 [6.69]110 [4.33]90 [3.54]
0 ... 80125 [4.92]85 [3.35]60 [2.36]125 [4.92]85 [3.35]60 [2.36]120 [4.72]80 [3.15]60 [2.36]140 [5.51]100 [3.74]75 [2.95]
0 ... 100115 [4.53]75 [2.95]60 [2.36]115 [4.53]75 [2.95]60 [2.36]110 [4.33]70 [2.76]60 [2.36]130 [5.12]90 [3.54]75 [2.95]
0 ... 12095 [3.74]70 [2.76]60 [2.36]95 [3.74]70 [2.76]60 [2.36]90 [3.54]65 [2.56]60 [2.36]110 [4.33]85 [3.35]75 [2.95]
0 ... 150100 [3.74]65 [2.56]60 [2.36]75 [2.95]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 16095 [3.74]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]110 [4.33]75 [2.95]75 [2.95]
0 ... 20095 [3.74]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]110 [4.33]75 [2.95]75 [2.95]
0 ... 25075 [2.95]60 [2.36]60 [2.36]75 [2.95]60 [2.36]60 [2.36]70 [2.76]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 300105 [4.13]90 [3.54]90 [3.54]95 [3.74]80 [3.15]80 [3.15]70 [2.76]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 400105 [4.13]90 [3.54]90 [3.54]95 [3.74]80 [3.15]80 [3.15]70 [2.76]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 500165 [6.50]130 [5.12]130 [5.12]155 [6.10]120 [4.72]120 [4.72]125 [4.92]90 [3.54]90 [3.54]150 [5.91]115 [4.53]115 [4.53]
0 ... 600145 [5.71]130 [5.12]130 [5.12]135 [5.31]120 [4.72]120 [4.72]105 [4.13]90 [3.54]90 [3.54]130 [5.12]115 [4.53]115 [4.53]
165 [6.50]145130155135120125 [4.92]10590150130115
0 ... 700[5.71][5.12][6.10][5.31][4.72][4.13][3.54][5.91][5.12][4.53]
Design1 2and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °C Minimuminsertion length in mm[in]
Back mount, adjustable stem and dial
-80…+6080 [3.15]60 [2.36]60 [2.36]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]65 [2.56]
-60…+4090 [3.54]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]110 [4.33]75 [2.95]65 [2.56]
-40…+6090 [3.54]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]110 [4.33]75 [2.95]65 [2.56]
-30…+50110 [4.33]60 [2.36]60 [2.36]110 [4.33]60 [2.36]60 [2.36]120 [4.72]70 [2.76]60 [2.36]130 [5.12]80 [3.15]65 [2.56]
-30…+7090 [3.54]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]105 [4.13]70 [2.76]60 [2.36]
-20…+40120 [4.72]80 [3.15]60 [2.36]120 [4.72]80 [3.15]60 [2.36]125 [4.92]85 [3.35]60 [2.36]135 [5.32]95 [3.74]65 [2.56]
-20…+60110 [4.33]70 [2.76]60 [2.36]110 [4.33]70 [2.76]60 [2.36]120 [4.72]80 [3.15]60 [2.36]130 [5.12]90 [3.54]65 [2.56]
-20…+8090 [3.54]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]110 [4.33]75 [2.95]65 [2.56]
-20…+10085 [3.35]60 [2.36]60 [2.36]85 [3.35]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]
-20…+12085 [3.35]60 [2.36]60 [2.36]85 [3.35]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]
0…60140 [5.51]80 [3.15]60 [2.36]140 [5.51]80 [3.15]60 [2.36]150 [5.91]90 [3.54]70 [2.76]160 [6.29]100 [3.74]80 [3.15]
0…80110 [4.33]70 [2.76]60 [2.36]110 [4.33]70 [2.76]60 [2.36]120 [4.72]80 [3.15]60 [2.36]130 [5.12]90 [3.54]65 [2.56]
0…100100 [3.74]60 [2.36]60 [2.36]100 [3.74]60 [2.36]60 [2.36]110 [4.33]70 [2.76]60 [2.36]120 [4.72]80 [3.15]65 [2.56]
0…12080 [3.15]60 [2.36]60 [2.36]80 [3.15]60 [2.36]60 [2.36]90 [3.54]65 [2.56]60 [2.36]100 [3.74]75 [2.95]65 [2.56]
0…15085 [3.35]60 [2.36]60 [2.36]85 [3.35]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]
0…16080 [3.15]60 [2.36]60 [2.36]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]65 [2.56]
0…20080 [3.15]60 [2.36]60 [2.36]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]65 [2.56]
0…25060 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]70 [2.76]60 [2.36]60 [2.36]80 [3.15]65 [2.56]65 [2.56]
0…30060 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]70 [2.76]60 [2.36]60 [2.36]80 [3.15]65 [2.56]65 [2.56]
0…40060 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]70 [2.76]60 [2.36]60 [2.36]80 [3.15]65 [2.56]65 [2.56]
0…500120 [4.72]85 [3.35]85 [3.35]120 [4.72]85 [3.35]85 [3.35]90 [3.54]60 [2.36]60 [2.36]135 [5.32]100 [3.74]100 [3.74]
0…600100 [3.74]85 [3.35]85 [3.35]100 [3.74]85 [3.35]85 [3.35]70 [2.76]60 [2.36]60 [2.36]115 [4.53]100 [3.74]100 [3.74]
1201008512010085907060135115100
0…700[4.72][3.74][3.35][4.72][3.74][3.35][3.54][2.76][2.36][5.32][4.53][3.74]
Design12 and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °CMinimum insertion length in mm[in]
Capillary ≤ 5 m[16 ft]
-80…+60115 [4.53]80 [3.15]70 [2.76]110 [4.33]75 [2.95]65 [2.56]100 [3.74]65 [2.56]60 [2.36]---
-60…+40135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
-40…+60135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
-30…+50145 [5.71]105 [4.13]75 [2.95]140 [5.51]100 [3.74]70 [2.76]130 [5.12]90 [3.54]60 [2.36]---
-30…+7090 [3.54]60 [2.36]70 [2.76]90 [3.54]60 [2.36]60 [2.36]105 [4.13]65 [2.56]60 [2.36]---
-20…+40120 [4.72]70 [2.76]60 [2.36]125 [4.92]75 [2.95]60 [2.36]135 [5.32]65 [2.56]60 [2.36]---
-20…+60145 [5.71]105 [4.13]75 [2.95]140 [5.51]100 [3.74]70 [2.76]130 [5.12]90 [3.54]60 [2.36]---
-20…+80135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
-20…+10085 [3.35]60 [2.36]70 [2.76]85 [3.35]60 [2.36]60 [2.36]95 [3.74]65 [2.56]60 [2.36]---
-20…+12075 [2.95]60 [2.36]70 [2.76]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]---
0…60165 [6.50]115 [4.53]85 [3.35]160 [6.29]110 [4.33]80 [3.15]150 [5.91]100 [3.74]70 [2.76]---
0…80155 [6.10]105 [4.13]75 [2.95]150 [5.91]100 [3.74]70 [2.76]140 [5.51]90 [3.54]60 [2.36]---
0…100135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…120125 [4.92]85 [3.35]70 [2.76]120 [4.72]80 [3.15]65 [2.56]110 [4.33]70 [2.76]60 [2.36]---
0…15075 [2.95]60 [2.36]70 [2.76]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]---
0…160115 [4.53]80 [3.15]70 [2.76]110 [4.33]75 [2.95]65 [2.56]100 [3.74]65 [2.56]60 [2.36]---
0…200105 [4.13]80 [3.15]70 [2.76]100 [3.74]75 [2.95]65 [2.56]90 [3.54]65 [2.56]60 [2.36]---
0…250105 [4.13]70 [2.76]70 [2.76]100 [3.74]65 [2.56]65 [2.56]90 [3.54]60 [2.36]60 [2.36]---
0…30095 [3.74]70 [2.76]70 [2.76]90 [3.54]65 [2.56]65 [2.56]80 [3.15]60 [2.36]60 [2.36]---
0…40095 [3.74]70 [2.76]70 [2.76]90 [3.54]65 [2.56]65 [2.56]80 [3.15]60 [2.36]60 [2.36]---
0…500115 [4.53]70 [2.76]70 [2.76]110 [4.33]65 [2.56]65 [2.56]100 [3.74]60 [2.36]60 [2.36]---
0…60095 [3.74]70 [2.76]70 [2.76]90 [3.54]65 [2.56]65 [2.56]80 [3.15]60 [2.36]60 [2.36]---
115807011075651006560--
0…700[4.53][3.15][2.76][4.33][2.95][2.56][3.74][2.56][2.36]-
Design12 and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °CMinimum insertion length in mm[in]
Capillary > 5 ... 10 m[16 ... 33 ft]
-80…+60135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
-60…+40155 [6.10]105 [4.13]75 [2.95]150 [5.91]100 [3.74]70 [2.76]140 [5.51]90 [3.54]60 [2.36]---
-40…+60155 [6.10]105 [4.13]75 [2.95]150 [5.91]100 [3.74]70 [2.76]140 [5.51]90 [3.54]60 [2.36]---
-30…+50165 [6.50]115 [4.53]85 [3.35]160 [6.29]110 [4.33]80 [3.15]150 [5.91]100 [3.74]70 [2.76]---
-30…+70120 [4.72]70 [2.76]70 [2.76]120 [4.72]65 [2.56]60 [2.36]130 [5.12]80 [3.15]60 [2.36]---
-20…+40140 [5.51]80 [3.15]70 [2.76]145 [5.71]85 [3.35]60 [2.36]155 [6.10]95 [3.74]65 [2.56]---
-20…+60175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
-20…+80155 [6.10]105 [4.13]75 [2.95]150 [5.91]100 [3.74]70 [2.76]140 [5.51]90 [3.54]60 [2.36]---
-20…+100105 [4.13]70 [2.76]70 [2.76]105 [4.13]60 [2.36]60 [2.36]115 [4.53]75 [2.95]60 [2.36]---
-20…+12095 [3.74]70 [2.76]70 [2.76]100 [3.74]60 [2.36]60 [2.36]110 [4.33]70 [2.76]60 [2.36]---
0…60185 [7.28]125 [4.92]95 [3.74]180 [7.08]120 [4.72]90 [3.54]170 [6.69]110 [4.33]80 [3.15]---
0…80175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
0…100155 [6.10]105 [4.13]85 [3.35]150 [5.91]100 [3.74]80 [3.15]140 [5.51]90 [3.54]70 [2.76]---
0…120145 [5.71]105 [4.13]75 [2.95]140 [5.51]100 [3.74]70 [2.76]130 [5.12]90 [3.54]60 [2.36]---
0…15095 [3.74]70 [2.76]70 [2.76]100 [3.74]60 [2.36]60 [2.36]110 [4.33]70 [2.76]60 [2.36]---
0…160135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…200125 [4.92]85 [3.35]70 [2.76]120 [4.72]80 [3.15]65 [2.56]110 [4.33]70 [2.76]60 [2.36]---
0…250125 [4.92]85 [3.35]70 [2.76]120 [4.72]80 [3.15]65 [2.56]110 [4.33]70 [2.76]60 [2.36]---
0…300115 [4.53]80 [3.15]70 [2.76]110 [4.33]75 [2.95]65 [2.56]100 [3.74]65 [2.56]60 [2.36]---
0…400115 [4.53]80 [3.15]70 [2.76]110 [4.33]75 [2.95]65 [2.56]100 [3.74]65 [2.56]60 [2.36]---
0…500135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…600115 [4.53]80 [3.15]70 [2.76]110 [4.33]75 [2.95]65 [2.56]100 [3.74]65 [2.56]60 [2.36]---
0…700145 [5.71]95 [3.74]70 [2.76]140 [5.51]90 [3.54]65 [2.56]130 [5.12]80 [3.15]60 [2.36]---
Design12 and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °CMinimum insertion length in mm[in]
Capillary > 10 ... 15 m[33 ... 49 ft]
-80…+60155 [6.10]105 [4.13]85 [3.35]150 [5.91]100 [3.74]80 [3.15]140 [5.51]90 [3.54]70 [2.76]---
-60…+40175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
-40…+60175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
-30…+50185 [7.28]125 [4.92]95 [3.74]180 [7.08]120 [4.72]90 [3.54]170 [6.69]110 [4.33]80 [3.15]---
-30…+70130 [5.12]75 [2.95]60 [2.36]130 [5.12]80 [3.15]60 [2.36]145 [5.71]90 [3.54]65 [2.56]---
-20…+40160 [6.29]95 [3.74]70 [2.76]165 [6.50]95 [3.74]60 [2.36]175 [6.89]105 [4.13]75 [2.95]---
-20…+60185 [7.28]125 [4.92]95 [3.74]180 [7.08]120 [4.72]90 [3.54]170 [6.69]110 [4.33]80 [3.15]---
-20…+80175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
-20…+100120 [4.72]75 [2.95]70 [2.76]125 [4.92]80 [3.15]60 [2.36]135 [5.32]90 [3.54]60 [2.36]---
-20…+120120 [4.72]70 [2.76]70 [2.76]120 [4.72]80 [3.15]60 [2.36]135 [5.32]90 [3.54]60 [2.36]---
0…60205 [8.07]135 [5.32]95 [3.74]200 [7.87]130 [5.12]90 [3.54]190 [7.48]120 [4.72]80 [3.15]---
0…80195 [7.68]125 [4.92]95 [3.74]190 [7.48]120 [4.72]90 [3.54]180 [7.08]110 [4.33]80 [3.15]---
0…100175 [6.89]115 [4.53]85 [3.35]170 [6.69]110 [4.33]80 [3.15]160 [6.29]100 [3.74]70 [2.76]---
0…120165 [6.50]115 [4.53]85 [3.35]160 [6.29]110 [4.33]80 [3.15]150 [5.91]100 [3.74]70 [2.76]---
0…150120 [4.72]70 [2.76]70 [2.76]120 [4.72]80 [3.15]60 [2.36]135 [5.32]90 [3.54]60 [2.36]---
0…160155 [6.10]105 [4.13]85 [3.35]150 [5.91]100 [3.74]80 [3.15]140 [5.51]90 [3.54]70 [2.76]---
0…200145 [5.71]105 [4.13]75 [2.95]140 [5.51]100 [3.74]70 [2.76]130 [5.12]90 [3.54]60 [2.36]---
0…250145 [5.71]95 [3.74]75 [2.95]140 [5.51]90 [3.54]70 [2.76]130 [5.12]80 [3.15]60 [2.36]---
0…300135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…400135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…500135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…600135 [5.32]95 [3.74]70 [2.76]130 [5.12]90 [3.54]65 [2.56]120 [4.72]80 [3.15]60 [2.36]---
0…700175 [6.89]105 [4.13]75 [2.95]170 [6.69]100 [3.74]70 [2.76]160 [6.29]90 [3.54]60 [2.36]---
Design12 and 34 and 5S
Stem diameter in mm[in]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]6 [0.24]8 [0.32]≥ 10 [0.40]
Scale range in °FMinimum insertion length in mm[in]
Back mount and lower mount
0 ... 200105 [4.13]70 [2.76]60 [2.36]80 [3.15]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]95 [3.74]75 [2.95]75 [2.95]
0 ... 250100 [3.74]65 [2.56]60 [2.36]75 [2.95]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]90 [3.54]75 [2.95]75 [2.95]
0 ... 50060 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]65 [2.56]60 [2.36]60 [2.36]75 [2.95]75 [2.95]75 [2.95]
Back mount, adjustable stem and dial
0…20090 [3.54]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]105 [4.13]70 [2.76]60 [2.36]
0…2508560 [2.36]60 [2.36]8560 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]100 [3.74]65 [2.56]60 [2.36]
0…50060 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]60 [2.36]65 [2.56]60 [2.36]60 [2.36]75 [2.95]60 [2.36]60 [2.36]
Capillary ≤ 5 m[16 ft]
0…20090 [3.54]60 [2.36]70 [2.76]95 [3.74]60 [2.36]60 [2.36]105 [4.13]70 [2.76]60 [2.36]---
0…25080 [3.15]60 [2.36]70 [2.76]80 [3.15]60 [2.36]60 [2.36]90 [3.54]60 [2.36]60 [2.36]---
0…50060 [2.36]70 [2.76]70 [2.76]60 [2.36]60 [2.36]60 [2.36]75 [2.95]60 [2.36]60 [2.36]---
Capillary > 5 ... 10 m[16 ... 33 ft]
0…200125 [4.92]70 [2.76]70 [2.76]125 [4.92]80 [3.15]60 [2.36]140 [5.51]90 [3.54]60 [2.36]---
0…25095 [3.74]60 [2.36]60 [2.36]100 [3.74]60 [2.36]60 [2.36]110 [4.33]70 [2.76]60 [2.36]---
0…50080 [3.15]70 [2.76]70 [2.76]80 [3.15]60 [2.36]60 [2.36]95 [3.74]60 [2.36]60 [2.36]---
Capillary > 10 ... 15 m[33 ... 49 ft]
0…200130 [5.12]75 [2.95]70 [2.76]135 [5.32]80 [3.15]60 [2.36]145 [5.71]90 [3.54]65---
0…250120 [4.72]70 [2.76]70 [2.76]120 [4.72]80 [3.15]60 [2.36]135 [5.32]90 [3.54]60 [2.36]---
0…500100 [3.74]70 [2.76]70 [2.76]100 [3.74]60 [2.36]60 [2.36]115 [4.53]75 [2.95]60 [2.36]---
Process connection
Thread size■ Plain, without thread ■ G½B ■ ½NPT ■ G½female ■ ½NPTfemale ■ M20 x 1.5 ■ M24 x 1.5 female
Material ( non-wetted )Stainless steel 316
Stem
Diameter■ 6 mm[0.24 in] ■ 8 mm[0.31 in] ■ 10 mm[0.39 in] ■ 12 mm[0.47 in]
Material (wetted)Stainless steel 316
Thermowell / Protection tubeIn principle, the operation of a mechanical thermometer is possible without a thermowell / protection tube with low process-side loading (low pressure, low viscosity and low flow rates). However, in order to enable exchanging the thermometer during operation (e.g. instrument replacement or calibration) and to ensure a better protection of the measuring instrument and also the plant and the environment, it is advisable to use a thermowell / protection tube from the extensiveWIKA portfolio. → For further information on the wake frequency calculation of the thermowell /
Output signal
Type of contact■ Magnetic snap-action contact, model 821, see page 11 ■ Inductive contact, model 831, see page 12 ■ Electronic contact, model 830 E, see page 13
Switching technology
Magnetic snap-action contact, model 821■ No control unit and no auxiliary power required ■ Direct switching up to 250 V, 1 A
Inductive contact, model 831■ Suitable for use in hazardous areas with corresponding control unit (model 904.xx) ■ Long service life due to non-contact switching ■ Low influence on the indication accuracy ■ Fail-safe switching at high switching frequency ■ Insensitive to corrosion ■ Also available in safety version
Electronic contact, model 830 E■ For direct triggering of a programmable logic controller (PLC) ■ Long service life due to non-contact switching ■ Low influence on the indication accuracy ■ Fail-safe switching at high switching frequency ■ Insensitive to corrosion
Contact setting■ Contact adjustable, adjustment key attached to cable socket ■ Contacts fixed, without adjustment lock ■ Contact adjustment lock leaded (tamper-proof) ■ Contact adjustment key fixed
Output signal: magnetic snap-action contact, model 821
Connection methodMagnetic snap-action contact
Number of switch contactsMax. 3 switch contacts
Switching functionSeparate circuits with ≥ 2 switches The switching function of each switch is indicated by index 1, 2 or 3
Model 821.1Normally open (clockwise pointer motion)
Model 821.2Normally closed (clockwise pointer motion)
Model 821.3Change-over contacts (normally closed or normally open simultaneously at the set point)
Switch point settingSet pointers of the contact thermometers are freely adjustable over the full scale range
Setting range (recommended)■ 25 ... 75 %of span ■ 0 ... 100 %, on request
Distance between switch pointsRecommended minimum distance between 2 contacts: 20 %of span
Switch hysteresis2 ... 5 %(typical)
Switching current0.02 ... 0.3 A (resistive load) Permissible switch-on and switch-off current: ≤ 0.5 A
Switching voltageAC/DC 24 ...250V
Rated operating voltage U eff≤ 250V
Rated operating current
Switch-on current≤ 0.5 A
Switch-off current≤ 0.5 A
Continuous current≤ 0.3 A
Switching power
Unfilled instruments≤ 30 W, ≤ 50VA
Filled instruments≤ 20 W, ≤ 20VA
Contact materialSilver-nickel, gold-plated
Switching voltageUnfilled instrumentsFilled instruments
Resistive loadInductive loadResistive loadInductive load
Direct cur- rentAlternating currentcos ϕ>0.7Direct cur- rentAlternating currentcos ϕ>0.7
DC 220 V / AC 230 V100mA120mA65mA65mA90mA40mA
DC 110 V / AC 110 V200mA240mA130mA130mA180mA85mA
DC 48 V / AC 48 V300mA450mA200mA190mA330mA130mA
DC 24 V / AC 24 V400mA600mA250mA250mA450mA150mA
Output signal: Inductive contact, model 831
Connection methodInductive contact
Number of switch contactsMax. 3 switch contacts
Switching functionContact versions: ■ 831-N ■ 831-SN, safety version 1) ■ 831-S1N, safety version 1) , inverted signal The switching function of the switch is indicated by index 1, 2 or 3.
Model 831.1Normally open (clockwise pointer motion)
Model 831.2Normally closed (clockwise pointer motion)
Model 831.3Change-over contacts (normally closed or normally open simultaneously at the set point)
Switch point settingSet pointers of the contact thermometers are freely adjustable over the full scale range
Setting range (recommended)10 ... 90 %of the scale range (0 ... 100 %onrequest)
Distance between switch pointsUp to 2 contacts can be set to an identical set point. For a version with 3 contacts this is not possible.The left (1st) or right (3rd) contact may not be set to the same set point as the other 2 contacts.The required displacement is approx. 30°, optionally to the right or to the left.
Switching currentDepending on the isolating amplifier/control unit used, see data sheet AC 08.04
Switching voltageDepending on the isolating amplifier/control unit used, see data sheet AC 08.04
Switching powerDepending on the isolating amplifier/control unit used, see data sheet AC 08.04
Permissible temperature ranges in hazardous areas
T6-20 ...+60 °C [-4 ...+140 °F]
T5 ...T1-20 ...+70 °C [-4 ...+158 °F]
T135 °C-20 ...+70 °C [-4 ...+158 °F]
ModelVersionEx version
904.28 KFU8 - SR2 - Ex1.W1 contactYes
904.29 KFU8 - SR2 - Ex2.W2 contactsYes
904.30 KHA6 - SH - Ex11 contactYes - Safety version
904.33 KFD2 - SH - Ex11 contactYes - Safety version
904.25 MSR 010-I1 contactNo
904.26 MSR 020-I2 contactsNo
904.27 MSR 011-ITwo-point controlNo
Output signal: electronic contact, model 830 E
Connection methodElectronic contact (PNP transistor)
Number of switch contactsMax. 3 switch contacts
Switching functionContact versions: ■ 2-wire system ■ 3-wire system The switching function of the switch is indicated by index 1, 2 or 3.
Model 830 E.1Normally open (clockwise pointer motion)
Model 830 E.2Normally closed (clockwise pointer motion)
Setting range (recommended)■ 10 ... 90 %of the scale range ■ 0 ... 100 %, on request
Distance between switch pointsUp to 2 contacts can be set to an identical set point. For a version with 3 contacts this is not possible.The left (1st contact) or right (3rd contact) contact may not be set to the same set point as the other two contacts.The required displacement is approx. 30°, optionally to the right or to the left.
Switching current≤ 100mA
Switching voltageDC 10 ...30V
Type of outputPNP transistor
Residual rippleMax.10%
No-load current≤ 10mA
Residual current≤ 100 µA
Voltage drop (with I max. )≤ 0.7V
Reverse polarity protectionConditional U B (the switched output 3 or 4 must never be set directly to minus)
Anti-inductive protection1 kV, 0.1 ms, 1 kΩ
Oscillator frequencyApprox. 1,000 kHz
EMCPer EN 60947-5-2
Electrical connection
Connection type■ Cable socket, black ■ PerVDE 0110 insulation group C/250V ■ Cable gland M20 x 1.5 ■ Connector ■ Rear cable outlet → Other connection types on request
Wire cross-section6 screw terminals + PE for conductor cross-section 2.5 mm²
Cable diameter7 ... 13 mm[0.28 ... 0.51 in], see dimensions on page 28
Pin assignmentThe pin assignment is given on the product label of the instrument. Connection terminals and ground terminal are appropriately marked.
MaterialPA 6 (polyamide)