WIKA · Level measurement · Family RLS
Float switch
For industrial applications, intrinsic safety Ex i
Range
0.06…1.5 m
Output
bimetal switch · Pt100
Accuracy
±3 mm switch point accuracy incl. hysteresis
Protection
IP54
CERoHSATEXIECExII 1/2G Ex ia IIC T3...T6 Ga/GbEx ia IIC T3...T6 Ga/GbEx ib IIIC T85°C...T150°C DbII 1/2G Ex ia IIC T3...T6II 2D Ex ib IIIC T85°C...T150°CGa/Gb Db IECEx
Price
On request
Depends on configuration
Description
The model RLS-4000 float switch with optional temperature output has been designed for the recording of level and temperature at hazardous measuring points. The stainless steel used is suitable for a multitude of media, such as, for example, oil, diesel and refrigerants.
Special features
- Media compatibility: Oil, diesel, refrigerants and other liquids
- Level: Up to 4 switching outputs, freely definable as normally open, normally closed or change-over contact
- Level and temperature: Up to 3 switching outputs, freely definable as normally open, normally closed or change-over contact and 1 bimetal temperature switch or Pt100 / Pt1000, accuracy: Class B
- Potential-free switching reed contacts
Identification
| Model | RLS-4000 |
| Product family | RLS |
| Subcategory | Float switch with temperature option |
Measuring range
| Level ranges | 0.06…1.5 m |
Process conditions
| Process connection | G 1G 2G 1 ½Flange DN 50, form B per DIN 2527/EN 1092, PN 16G ⅛G ¼G ⅜G ½FlanschG ⅛BG ¼ BG ⅜BG ½BG 1¼G 8¼G 1 (outside)G 1½ (outside)G 2 (outside) |
| Process temperature | −30…+150 °C |
| Max process pressure | 40 bar |
| Measurement technology | float |
Electrical characteristics
| Output signal | bimetal switch · Pt100 · Pt1000 · SPDT · NO · NC · switch point (NO/NC) · switch point |
| Electrical connection | Cable outlet, Standard connection housing, Compact connection housing |
Materials
| Wetted parts material | Stainless steel 316Ti, 316Ti, Float: 316Ti |
Operating environment
| Ambient temperature | −30…+80 °C |
| IP rating | IP54 |
Certifications and approvals
| Certifications | CERoHSATEXIECEx |
| Explosion protection | II 1/2G Ex ia IIC T3...T6 Ga/GbII 2D Ex ib IIIC T85°C...T150°C DbEx ia IIC T3...T6 Ga/GbEx ib IIIC T85°C...T150°C DbII 1/2G Ex ia IIC T3...T6II 2D Ex ib IIIC T85°C...T150°CGa/Gb Db IECEx |
Additional details
| Datasheet languages | EN |
Tables from datasheet
| Float switch, model RLS-4000 | Level | Temperature (option) | |||
|---|---|---|---|---|---|
| Measuring principle | Potential-free switching reed contacts are triggered by a magnet in the float | Bimetal switch or Pt100/Pt1000 measuring resistor in pipe end | |||
| Measuring range | Guide tube length L: 60 ... 1,500 mm[2.5 ... 59 in], | Bimetal switch: 30 ... 150 °C [86 ... 302 °F] Pt100/Pt1000 | |||
| Output signal 1) | Up to 4 switch points, depending on the electrical connection: L-SP1, L-SP2, L-SP3, L-SP4 1) | ■ Bimetal switch ■ Pt100, 2-wire ■ Pt1000, 2-wire | |||
| Switching function | Alternatively normally open (NO), normally closed | Normally closed (NC) | |||
| Switch position | Specified in mm, starting from the upper sealing face (L-SP1 ... L-SP4) At the end of the guide tube ≈ 45 mm[≈ 1.8 in] cannot be used for switch positions. | ||||
| Distance between switch points 2) | Minimum distance L-SP1 to the upper sealing face: 50 mm[2.0 in] Minimum distance between the switch points: 50 mm[2.0 in], for floats with outer ∅D=44mm[1.7 in], 52 mm[2.0 in] 30 mm[1.2 in], for floats with outer ∅D=25mm[1.0 in], 30 mm[1.2 in] Minimum distance with 3 switch points: 80 mm[3.1 in], either between L-SP1 and L-SP2 or L-SP2 and L-SP3 Minimum distance with 4 switch points: 80 mm[3.1 in], between SP2 and SP3 | ||||
| Safety-related maximum values | Only for U i = 30V I i = 100mA P = 0.9W | connection to a certified intrinsically safe circuit with max.: C i = 0 nF L i = 0 μH | |||
| Accuracy | ±3 mmswitch point accuracy incl. hysteresis, non-repeatability | ■ Bimetal switch: ±5 °C switch point accuracy, ±20 °C hysteresis ■ Pt100, Pt1000: Class B per DIN EN 60751 | |||
| ±30° | Mounting position Vertical | ||||
| Process connection | ■ G⅛, installation from inside 3) 4) 5) ■ G¼, installation from inside 3) 4) ■ G⅜, installation from inside 4) ■ G½, installation from inside 4) ■ G1, installation from outside 3) ■ G1½, installation from outside ■ G2, installation from outside ■ Flange DN 50, form B per DIN 2527/EN 1092, PN 16, installation from outside | ||||
| Material | |||||
| Wetted | Process connection, guide tube: Stainless steel 316Ti Float:See table on page 3 | ||||
| Non-wetted | Case: Stainless steel 316Ti Electrical connection:See table on page 3 | ||||
| Permissible temperatures | |||||
| Medium | -30 …+80 °C [-22 …+176 °F] -30 …+120 °C [-22 …+248 °F] 6) -30 …+150 °C [-22 …+302 °F] 7) | ||||
| Ambient | -20 …+80 °C [-4 …+176 °F] | ||||
| Storage | -20 …+80 °C [-4 …+176 °F] | ||||
| Permissible temperatures | depending on the temperature class | ||||
| T3 | T4 | T5 | T6 | ||
| Surface temperature | ≤ 150 °C [≤ 302 °F] | ≤ 135 °C [≤ 275 °F] | ≤ 100 °C [≤ 212 °F] | ≤ 85 °C [≤ 185 °F] | |
| Process temperature Ambient temperature | ≤ 150 °C [≤ 302 °F] ≤ 60 °C [≤ 140 °F] | ≤ 130 °C [≤ 266 °F] ≤ 60 °C [≤ 140 °F] | ≤ 60 °C [≤ 140 °F] | ≤ 80 °C [≤ 176 °F] ≤ 60 °C [≤ 140 °F] |
| Electrical connections | Level Max. switch point definition | Ingress protection per IEC/EN 60529 | Protection class | Material | Cable length |
|---|---|---|---|---|---|
| Cable outlet | ■ 4 NO/NC ■ 4 SPDT | IP54 | II | PVC | ■ 2 m[6.5 ft] ■ 5 m[16.4 ft] |
| Cable outlet | ■ 4 NO/NC ■ 4 SPDT | IP54 | II | PUR | other lengths on request |
| Cable outlet | ■ 4 NO/NC ■ 2 NO/NC + 1 SPDT | IP54 | II | Silicone | |
| 'Standard' connection housing Dimensions: 75 x 80x57mm [2.9 x 3.1 x 2.2 in] For cable diameter: 5 ...10mm [0.2 ... 0.4 in] | ■ 4 NO/NC ■ 4 SPDT | IP54 | I | ■ Aluminium ■ Glands from polyamide ■ Brass ■ Stainless steel | - |
| 'Compact' connection housing Dimensions: 58 x 64x36mm [2.3 x 2.5 x 1.4 in] For cable diameter: 5 ...10mm [0.2 ... 0.4 in] | ■ 4 NO/NC ■ 2 NO/NC + 1 SPDT ■ 2 SPDT | IP54 | I |
| Float | Form | Outer diameter∅D | Height H | Operating pressure | Medium temperature | Density | Material |
|---|---|---|---|---|---|---|---|
| Cylinder 1) | 44 mm[1.7 in] 4) | 52 mm[2.0 in] | ≤ 16 bar [≤ 232 psi] | ≤ 150 °C [≤ 302 °F] | ≥ 750 kg/m³ [46.8 lbs/ft³] | 316Ti | |
| H | Cylinder 2) | 30 mm[1.2 in] | 36 mm[1.4 in] | ≤ 10 bar [≤ 145 psi] | ≤ 80 °C (≤ 176 °F) | ≥ 850 kg/m³ [53.1 lbs/ft³] | 316Ti |
| H | Sphere 3) | 52 mm[2.0 in] 4) | 52 mm[2.0 in] | ≤ 40 bar [≤ 580 psi] | ≤ 150 °C [≤ 302 °F] | ≥ 750 kg/m³ [46.8 lbs/ft³] | 316Ti |
| Process connection | Outer diameter float∅D | ||
|---|---|---|---|
| ∅30 mm[1.2 in] | ∅44 mm[1.7 in] | ∅52 mm[2.0 in] | |
| G 1 (from outside) | 35 mm[1.4 in] | - | - |
| G 1 ½(from outside) | 35 mm[1.4 in] | 45 mm[1.8 in] | - |
| G 2 (from outside) | 40 mm[1.6 in] | 50 mm[2.0 in] | 50 mm[2.0 in] |
| Flansch (from outside) | 20 mm[0.8 in] | 30 mm[1.2 in] | 30 mm[1.2 in] |
| G ⅛B(from inside) | 30 mm[1.2 in] | - | - |
| G ¼ B (from inside) | 35 mm[1.4 in] | 40 mm[1.6 in] | 40 mm[1.6 in] |
| G ⅜B(from inside) | 35 mm[1.4 in] | 40 mm[1.6 in] | 40 mm[1.6 in] |
| G ½B(from inside) | 35 mm[1.4 in] | 45 mm[1.8 in] | 45 mm[1.8 in] |
View all (9)
| Dead band | Outer diameter float∅D | ||
|---|---|---|---|
| ∅30 mm[1.2 in] | ∅44 mm[1.7 in] | ∅52 mm[2.0 in] | |
| T2 | 40 mm[1.6 in] | 50 mm[2.0 in] | 50 mm[2.0 in] |
| G | L 1 | Spanner width |
|---|---|---|
| G1 | 16 mm[0.63 in] | 41 mm[1.6 in] |
| G1½ | 18 mm[0.71 in] | 30 mm[1.2 in] |
| G2 | 20 mm[0.79 in] | 36 mm[1.4 in] |
| G | L 1 | Spanner width |
|---|---|---|
| G⅛B | 12 mm[0.47 in] | 14 mm[0.5 in] |
| G ¼ B | 12 mm[0.47 in] | 19 mm[0.7 in] |
| G⅜B | 12 mm[0.47 in] | 22 mm[0.9 in] |
| G½B | 14 mm[0.55 in] | 27 mm[1.1 in] |
| Logo | Description | Country |
|---|---|---|
| EU declaration of conformity ■ Low voltage directive ■ RoHS directive ■ ATEX directive Hazardous areas II 1/2G Ex ia IIC T3...T6 II 2D Ex ib IIIC T85°C...T150°C | European Union | |
| Ga/Gb Db IECEx | International |
| Re- placed model | Current model | Description |
|---|---|---|
| EX-SR 10 | RLS-4000 | Float switch, stainless steel, terminal housing, ATEX approval |
| EX-SR 11 | RLS-4000 | Float switch, stainless steel, cable outlet, ATEX approval |
| EX-SR 13 | RLS-4000 | Compact float switch, stainless steel, terminal housing, ATEX approval |
| EX-SR 14 | RLS-4000 | Compact float switch, stainless steel, cable outlet, ATEX approval |
| EX-SR 20 | RLS-4000 | Compact angled float switch, stainless steel, cable outlet, ATEX approval |
| EX-SR 21 | RLS-4000 | Compact angled float switch, stainless steel, cable outlet, ATEX approval |
| SR 6 | RLS-5000 | Bilge float switch |
| SR 10 | RLS-1000 | Float switch, stainless steel, terminal housing |
| SR 11 | RLS-1000 | Float switch, stainless steel, cable outlet |
| SR 12 | RLS-1000 | Float switch, stainless steel, connector |
| SR 13 | RLS-1000 | Compact float switch, stainless steel, terminal housing |
| SR 14 | RLS-1000 | Compact float switch, stainless steel, cable outlet |
| SR 20 | RLS-1000 | Angled float switch, stainless steel, cable outlet |
| SR 30 | RLS-2000 | Float switch, plastic, terminal housing |
| SR 31 | RLS-2000 | Float switch, plastic, cable outlet |
| SR 32 | RLS-2000 | Float switch, plastic, connector |
| SR 33 | RLS-2000 | Angled float switch, plastic, cable outlet |
| SR 71 | RLS-1000 | Compact float switch, stainless steel, cable outlet |
| SR 80 | RLS-6000 | Suspended float switch, switch rod activated, reed switch |
| TN 210 | RLS-3000 | Float switch, stainless steel, terminal housing, integrated temperature switch |
| TN 211 | RLS-3000 | Float switch, stainless steel, cable outlet, integrated temperature switch |
| TN 230 | RLS-3000 | Float switch, stainless steel, terminal housing, integrated Pt100 temperature output signal |
| TN 231 | RLS-3000 | Float switch, stainless steel, cable outlet, integrated Pt100 temperature output signal |
Industry
Machinery
Combined level and temperature measurement of liquids in machine building · Control and monitoring tasks for hydraulic power packs, compressors and cooling systems
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