736.51

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WIKA · Pressure measurement · Family 736

Differential pressure gauge

Name: Differential pressure gauge
Brand: WIKA

For very low differential pressures, from 2.5 mbar, with capsule element

Range

0…1000 mbar

Output

Magnetic snap-action contact

Accuracy

1.6

Protection

IP66

CERoHSCRNEAC

Price

On request

Depends on configuration

Request a quote

+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

The model 736.51 capsule pressure gauge is based upon the proven capsule measuring system and is suitable for very low pressures. On pressurisation, the expansion of the capsule element, proportional to the incident pressure, is transmitted to the movement and indicated.

For the version with switch contact, magnetic snap-action contacts, reed switches, and electronic contacts are available. For triggering programmable logic controllers (PLC), electronic contacts and reed switches can be used.

Fig. left: Model 736.51, NS 100

Fig. right: Model 736.51, NS 160 with switch contacts

Special features

Differential pressure measuring ranges from 0 … 2.5 mbar
Ingress protection IP66
Case and wetted parts from stainless steel
Version with switch contact for PLC applications

Identification

Model	736.51
Product family	736
Subcategory	Differential pressure gauge

Measuring range

Pressure ranges

0…2.5 mbar · 0…4 mbar · 0…6 mbar · 0…10 mbar · 0…25 mbar · 0…40 mbar · 0…60 mbar · 0…100 mbar · 0…16 mbar · 0…160 mbar · 0…25 inH2O · 0…0.5 kPa · 0…1 kPa · 0…1.6 kPa · 0…2.5 kPa · 0…4 kPa · 0…6 kPa · 0…10 kPa · 0…1000 mmH2O · 0…5 inH2O · 0…10 inH2O · 0…15 inH2O · 0…20 inH2O · 0…30 inH2O · 0…40 inH2O · 0…600 mbar · 0…1000 mbar · 0…25 mm H2O · 0…40 mm H2O · 0…60 mm H2O · 0…100 mm H2O · 0…160 mm H2O · 0…250 mm H2O · 0…400 mm H2O · 0…600 mm H2O · 0…1000 mm H2O · 0…5 in H2O · 0…10 in H2O · 0…15 in H2O · 0…20 in H2O · 0…25 in H2O · 0…30 in H2O · 0…40 in H2O · 0…0.5 mbar · 0…1 mbar · 0…1.6 mbar · 0…25 mmH2O · 0…40 mmH2O · 0…60 mmH2O · 0…100 mmH2O · 0…160 mmH2O · 0…250 mmH2O · 0…400 mmH2O · 0…600 mmH2O

Accuracy

Accuracy class	1.6
Accuracy standard	EN 837-1

Process conditions

Process connection	G ½ B½ NPTEN 837-1ANSI/B1.20.12xG1/2B2x1/2NPT
Process temperature	−20…+60 °C

Electrical characteristics

Output signal	Magnetic snap-action contact · Electronic contact (PNP transistor) · Reed switch · Reed contact
Power supply	DC 10 ... 30 V
Electrical connection	Cable socket, M20 x 1.5
Switching function	Normally open, Normally closed, Change-over
Switching contacts	3

Materials

Case material	Stainless steel 1.4571 (316 Ti)
Wetted parts material	Stainless steel 1.4571, Aluminium, Laminated safety glass, PUR, PTFE, NBR
Sealing material	PTFE, NBR

Operating environment

Ambient temperature	−20…+60 °C
IP rating	IP66
Weight	1.7 kg

Certifications and approvals

Certifications

CERoHSCRNEAC

Additional details

Dial size	100 mm
Datasheet languages	EN, DE

Tables from datasheet

Pressure gauge	Switch contact
	Without	Magnetic snap-action contact (model 821)	Electronic contact (model 830 E)	Reed contact (model 851)
Model 736.51, with capsule	x
element		x
		x
			x

Basic information

Nominal size	■ Ø100mm ■ Ø160mm
Window	Laminated safety glass
Case
Design	Safety level 'S1' per EN 837-1:With blow-out device
Material	Stainless steel 1.4571 (316 Ti)
Ring	Bayonet ring, stainless steel
Mounting	■ Without ■ Panel mounting flange, stainless steel ■ Panel mounting flange, polished stainless steel ■ Triangular profile ring with mounting bracket, polished stainless steel ■ Surface mounting flange, stainless steel
Case filling	■ Without ■ Silicone oil
Movement	Stainless steel

Measuring element

Type of measuring element	Capsule element
Material	Stainless steel 1.4571
Leak tightness	Helium tested, leakage rate: < 5∙10 -3 mbar l/s

Accuracy specifications

Accuracy class	■ 1.6 ■ 1.0
Temperature error	On deviation from the reference conditions at the measuring system: max. ±0.6 %/10 K of full scale value
Zero point setting	Via adjustment appliance at case circumference at 12 o'clock, stainless steel (wetted)
Reference conditions
Ambient temperature	+20 °C

View all (16)

Scale range
mbar
0 ... 2.5	0 ... 4	0 ... 6	0 ... 10	0 ... 16
0 ... 25	0 ... 40	0 ... 60	0 ... 100
0 ... 0.5 0 ... 6	0 ... 1 0 ... 10	0 ... 1.6	0 ... 2.5	0 ... 4
0 ... 25	0 ... 40	0 ... 60	0 ... 100	0 ... 160
mmH 2 O			0 ... 1,000
0 ... 250 in H 2 O	0 ... 400	0 ... 600
0 ... 5	0 ... 10	0 ... 15	0 ... 20	0 ... 25
0 ... 25	0 ... 30	0 ... 40

Output signal: Contact model 821, magnetic snap-action contact

Connection method	Magnetic snap-action contact
Switching technology	■ No control unit and no supply voltage required ■ Direct switching up to 250 V, 1 A
Number of switch contacts
Span ≥ 25 mbar ...< 40 mbar 1)	Max. 2 switch contacts
Span ≥ 40 mbar	Max. 3 switch contacts 2)
Switching function	■ Separate circuits with ≥ 2 switches ■ Cable break monitoring with parallel resistance (47 kΩ or 100 kΩ) The switching function of each switch is indicated by index 1, 2 or 3
Model 821.1	Normally open (clockwise pointer motion)
Model 821.2	Normally closed (clockwise pointer motion)
Model 821.3	Change-over; one contact breaks and one contact makes simultaneously when pointer reaches set point
Switch point setting	Set pointers of the contact pressure gauges are freely adjustable over the full scale range
Setting range (recommended)	25 ... 75 %of span (0 ... 100 %onrequest)
Distance between switch points	Recommended minimum distance between 2 contacts: 20 %of span
Switch hysteresis	2 ... 5 %(typical)
Switching current	0.02 ... 0.3 A (resistive load) Permissible switch-on and switch-off current: ≤ 0.5 A
Switching voltage	AC/DC 24 ...250V
Switching power
Unfilled instruments	≤ 30 W, ≤ 50VA
Filled instruments	≤ 20 W, ≤ 20VA
Contact material	■ Silver-nickel, gold-plated

Switching voltage	Unfilled instruments	Filled instruments
	Resistive load	Inductive load	Resistive load	Inductive load
	Direct cur - rent	Alternating current	cos ϕ>0.7	Direct cur - rent	Alternating current	cos ϕ>0.7
DC 220 V / AC 230 V	100mA	120mA	65mA	65mA	90mA	40mA
DC 110 V / AC 110 V	200mA	240mA	130mA	130mA	180mA	85mA
DC 48 V / AC 48 V	300mA	450mA	200mA	190mA	330mA	130mA
DC 24 V / AC 24 V	400mA	600mA	250mA	250mA	450mA	150mA

Output signal: Contact model 830 E, electronic contact

Connection method	Electronic contact (PNP transistor)
Switching technology	■ For direct triggering of a programmable logic controller (PLC) ■ Long service life due to non-contact sensor ■ Low influence on the indication accuracy ■ Fail-safe switching at high switching frequency ■ Insensitive to corrosion
Number of switch contacts
Span ≥ 25 mbar	Max. 3 switch contacts
Switching function	Contact versions: ■ 2-wire system ■ 3-wire system The switching function of each switch is indicated by index 1 or 2
Model 830 E.1	Normally open (clockwise pointer motion)
Model 830 E.2	Normally closed (clockwise pointer motion)
Setting range (recommended)	10 ... 90 %of span (0 ... 100 %onrequest)
Distance between switch points	Up 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 oth- er 2 contacts.The required displacement is approx. 30°, optionally to the right or to the left.
Switching current	≤ 100mA
Switching voltage	DC 10 ...30V

Output signal: Contact model 851, reed switch

Connection method	Bistable reed switch
Switching technology	■ No control unit and no supply voltage required ■ Direct switching up to 250 V, 1 A ■ For direct triggering of a programmable logic controller (PLC) ■ Free from wear as without contact
Number of switch contacts
NS 100	Max. 2 switch contacts
NS 160	1 switch contact
Switching function	■ Separate circuits with ≥ 2 switches ■ Cable break monitoring with parallel resistance (47 kΩ or 100 kΩ) The switching function of each switch is indicated by index 1, 2 or 3
Model 851.3	Change-over; one contact breaks and one contact makes simultaneously when pointer reaches set point
Switch point setting	Set pointers of the contact pressure gauges are freely adjustable over the full scale range
Setting range (recommended)	10 ... 90 %of span
Distance between switch points	When using two contacts, these cannot be set to the same point. Depending on the switch- ing function, a minimum clearance of 15 ... 30° is required.
Switch hysteresis	3 ...5%
Switching current	AC/DC 1 A
Switching voltage 1)	AC/DC 250V
Switching power	60 W, 60VA
Contact material	Rhodium
Transport current	AC/DC 2 A
Inductive load cosϕ	1
Contact resistance (static)	100mΩ
Insulation resistance	109Ω
Breakdown voltage	DC 1,000V
Switching time incl. contact chatter	4.5 ms

Electrical connections 1)

Connection type	■ Cable socket, black PerVDE 0110 insulation group C/250V Cable gland M20 x 1.5 ■ Connector (instead of cable socket)
Wire cross-section	6 screw terminals + PE for 2.5 mm²
Cable diameter	→See dimensions
Pin assignment	Connection details are given on the product label of the instrument. Connection termi- nals and ground terminals are appropriately marked.
Material	PA 6 (polyamide)

Operating conditions

Medium temperature	+60 °C [+140 °F] maximum
Ambient temperature	-20 ...+60 °C [-4 ... 140 °F]
Storage temperature	-20 ...+60 °C [-4 ... 140 °F]
Pressure limitation
Steady	Full scale value
Fluctuating	0.9 x full scale value
Ingress protection of the complete instrument	IP66 per IEC/EN 60529

Logo	Description	Region
	EU declaration of conformity	European Union
	EMCdirective
-	CRN Safety (e.g. electr. safety, overpressure, ...)	Canada

Logo	Description	Region
	EAC (option) Pressure equipment directive	Eurasian Economic Community
	GOST Metrology, measurement technology	Russia
	KazInMetr Metrology, measurement technology	Kazakhstan
-	MTSCHS Permission for commissioning	Kazakhstan
	BelGIM Metrology, measurement technology	Belarus
	UkrSEPRO Metrology, measurement technology	Ukraine
	Uzstandard Metrology, measurement technology	Uzbekistan

Certificates

Certificates	■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, indication accuracy) ■ 3.1 inspection certificate per EN 10204 (e.g. indication accuracy)
Recommended calibration interval	1 year (dependent on conditions of use)

NS	Dimensions in mm[in]	Weight in kg [lb]
	a	b	D 1	D 2	d	e	G	h ±1	X	SW
100	15.5 [0.61]	49.5 [1.95]	101 [3.98]	99 [3.90]	133 [5.24}	17.5 [0.69]	G½B	170 [6.69]	37 [1.46]	22 [0.87]	1.70 [3.75]
160	15.5 [0.61]	49.5 [1.95]	161 [6.34]	159 [6.26]	133 [5.24}	17.5 [0.69]	G½B	200 [7.87]	37 [1.46]	22 [0.87]	2.20 [4.85]

	Description	Order number
910.17	Sealings →See data sheet AC 09.08	-
IV3x, IV5x	Valve manifold for differential pressure measuring instruments →See data sheet AC 09.23	-
-	Diaphragm seal	On request