WIKA · Level measurement · Family RLS
Float switch
For industrial applications, plastic version
Range
0.07…1.5 m
Output
SP1 · SP2
Accuracy
±3 mm
Protection
IP67
CERoHS
Price
On request
Depends on configuration
Description
The RLS-2000 is a reliable and inexpensive float switch made of high-quality plastic. It is particularly suited for measuring the levels of aggressive and corrosive media, such as bases and acids. Float switches are an ideal solution for cost-sensitive applications such as the monitoring of levels or overflow and dry-run protection.
The RLS-2000 detects the level by means of a permanent magnet and frictionless reed contacts at up to 4 defined switch points, without contact and thus free from wear. Integration as a limit level switch is simple, convenient and fast, because no adaptation or calibration is required during installation. Its robust design minimises service and maintenance costs.
Fig. left: Mounting thread, angular connector Fig. right: Cable outlet
Special features
- Highest reliability in aggressive media
- Optimum process safety thanks to SMD production
- Simple and fast installation
Identification
| Model | RLS-2000 |
| Product family | RLS |
| Subcategory | Float switch |
Measuring range
| Level ranges | 0.07…1.5 m |
Process conditions
| Process connection | G ½G ¾G 1G 1 ½G 2G ⅜ BG ½ B |
| Process temperature | −30…+120 °C |
| Max process pressure | 16 bar |
| Measurement technology | float |
Electrical characteristics
| Output signal | SP1 · SP2 · SP3 · SP4 |
| Electrical connection | Angular connector DIN EN 175301-803 A, Circular connector M12 x 1 (4-pin), Cable outlet, Connection housing |
Materials
| Wetted parts material | PP, PVC, PVDF |
Operating environment
| Ambient temperature | −30…+80 °C |
| IP rating | IP67 |
Certifications and approvals
| Certifications | CERoHS |
Additional details
| Datasheet languages | EN |
Tables from datasheet
Float switch, model RLS-2000
| Measuring principle | Potential-free switching reed contacts are triggered by a magnet in the float. | ||
|---|---|---|---|
| Guide tube length L | |||
| PP version | 100 ... 1,500 mm[4 ... 59 in] | ||
| PVDF version | 120 ... 1,500 mm[4.7 ... 59 in] | ||
| PVC version | 70 ... 1,500 mm[2.8 ... 59 in] | ||
| Other lengths on request | |||
| Output signal | Up to 4 switch points, depending on the electrical connection: SP1, SP2, SP3, SP4 | ||
| Switching function | Alternatively normally open (NO), normally closed (NC) or change-over (SPDT) contact - on rising level | ||
| Switch position | Specified in mm, starting from the upper sealing face (SP1 ... SP4) | ||
| PP and PVC version | At the end of the guide tube ≈ 45 mm[≈ 1.8 in] cannot be used for switch positions. | ||
| PVDF version | At the end of the guide tube ≈ 65 mm[≈ 2.6 in] cannot be used for switch positions. | ||
| Distance between switch points 1) | Minimum distance SP1 to the upper sealing face: Minimum distance between the switch points: Minimum distance with 3 switch points: Minimum distance with 4 switch points: | 50 mm[2.0 in] 50 mm[2.0 in] 80 mm[3.1 in], either between SP1 and SP2 or SP2 and SP3 80 mm[3.1 in], between SP2 and SP3 | |
| Switching power 2) | Floats with outer diameter ∅D=44mm[1.7 in], 55 mm[2.2 in] Normally open, normally closed: AC 230 V; 100 VA; 1 A; 50 ... 60 Hz | ||
| Change-over contact: | DC 230 V; 50 W;0,5 A AC 230 V; 40 VA; 1 A; 50 ... 60 Hz | ||
| Floats with outer diameter ∅D=18mm[0.7 in], 25 mm[1.0 in] Normally open, normally closed: AC 100 V; 10 VA; 0.5 A; 50 ... 60 Hz DC 100 V; 10 W;0.5 A | |||
| Accuracy | ±3 mmswitch point accuracy incl. hysteresis, non-repeatability | ||
| Mounting position | Vertical ±30° | ||
| Process connection | ■ G½, installation from outside 3) ■ G¾, installation from outside 3) G1, installation from outside 4) ■ G1½, installation from outside 5) ■ G2, installation from outside ■ G⅜,installation from inside 6) ■ G½,installation from inside 6) | ||
| Wetted | Process connection, | PVC or PVDF | |
| Float See table on page 3 | |||
| Non-wetted | |||
| Case PP, PVDF (option) | |||
| Medium | |||
| PP version | |||
| Ambient | PVC version | -10 …+80 °C [14 …176 °F] -10 …+80 °C [14 …176 °F] 7) | |
| PVDF version | Option: -30 …+120 °C [-22 …+248 °F] 7) | ||
| -10 …+60 °C [14 …140 °F] | |||
| PP version | -10 …+80 °C [14 …176 °F] | ||
| PVDF version | -30 …+80 °C [-22 …+176 °F] | ||
| Storage | PP version | -10 …+80 °C [14 …176 °F] | |
| PVDF version | -30 …+80 °C [-22 …+176 °F] | ||
| PVC version | -10 …+60 °C [14 …140 °F] |
| Electrical connections 1) | Max. switch point definition | Ingress protection per IEC/EN 60529 2) | Protection class | Material | Cable length |
|---|---|---|---|---|---|
| Angular connector DIN EN 175301-803 A | ■ 2 NO/NC ■ 1 SPDT | IP65 | II | PA | - |
| Circular connector M12 x 1 (4-pin) | ■ 3 NO/NC ■ 1 NO/NC + 1 SPDT | IP65 | II | TPU, brass | - |
| Cable outlet | ■ 4 NO/NC ■ 4 SPDT | IP67 | II | PVC | ■ 2 m[6.5 ft] ■ 5 m[16.4 ft] |
| Cable outlet | ■ 4 NO/NC ■ 2 NO/NC + 1 SPDT | IP67 | II | Silicone | other lengths on request |
| Connection housing Dimensions: 80 x 82x55mm [3.1 x 3.2 x 2.2 in] For cable diameter: 5 ...10mm [0.2 ... 0.4 in] | ■ 4 NO/NC ■ 4 SPDT | IP66 | II | Polycarbonate, glands from polyamide, brass, stainless steel | - |
| Float | Form | Outer diameter ∅D | Height H | Operating pressure | Medium temperature | Density | Material |
|---|---|---|---|---|---|---|---|
| ∅D H | Cylinder 1) 2) 3) 5) | 44 mm[1.7 in] | 44 mm[1.7 in] | ≤ 3 bar [≤ 43.5 psi] | ≤ 80 °C [≤ 176 °F] | ≥ 500 kg/m³ [31.2 lbs/ft³] | PP |
| Cylinder 2) 3) 4) | 55 mm[2.2 in] | 55 mm[2.2 in] | ≤ 3 bar [≤ 43.5 psi] | ≤ 80 °C [≤ 176 °F] | ≥ 500 kg/m³ [31.2 lbs/ft³] | PP | |
| Cylinder 2) 3) 4) | 55 mm[2.2 in] | 65 mm[2.6 in] | ≤ 3 bar [≤ 43.5 psi] | ≤ 120 °C [≤ 248 °F] | ≥ 800 kg/m³ [49.9 lbs/ft³] | PVDF | |
| Cylinder 2) 4) 5) | 25 mm[1.0 in] | 23 mm[0.9 in] | ≤ 4 bar [≤ 58 psi] | -25 ...+80 °C [-13 ...+176 °F] | ≥ 700 kg/m³ [43.7 lbs/ft³] | PP | |
| Cylinder 2) 4) 5) | 25 mm[1.0 in] | 23 mm[0.9 in] | ≤ 4 bar [≤ 58 psi] | "-25 ...+80 °C [-13 ...+176 °F] | ≥ 750 kg/m³ [46.8 lbs/ft³] | PA6.6 | |
| Cylinder 2) 4) 5) | 25 mm[1.0 in] | 17 mm[0.7in] | ≤ 16 bar [≤ 232 psi] | -30 ... 80 °C [-22 ... 176 °F] | ≥ 750 kg/m³ [46.8 lbs/ft³] | Buna / NBR | |
| Cylinder 4) 5) | 18 mm[0.7 in] | 32 mm[1.3 in] | ≤ 16 bar [≤ 232 psi] | -30 ... 80 °C [-22 ... 176 °F] | ≥ 750 kg/m³ [46.8 lbs/ft³] | Buna / NBR |
Angular connector DIN EN 175301-803 A
| Normally open/normally closed (NO/NC) | Change-over contact (SPDT) | |
|---|---|---|
| 2 switch points SP1 1 2 SP2 1 3 | 1 switch point SP1 1 2 |
View all (10)
| Legend SP1 - SP4 | Switch points | GY | Grey | BK | Black |
|---|---|---|---|---|---|
| WH | White | PK | Pink | VT | Violet |
| BN | Brown | BU | Blue | GYPK | Grey/Pink |
| GN | Green | RD | Red | RDBU | Red/Blue |
| Process connection | Dead band inmm | |||||
|---|---|---|---|---|---|---|
| Outer diameter float ∅D | ∅18mm [0.7 in] | ∅25mm [1.0 in] | ∅25mm [1.0 in] | ∅44mm [1.7 in] | ∅55mm [2.2 in] | ∅55mm [2.2 in] |
| Float height H | H 32mm [1.3 in] | H 17mm [0.7 in] | H 23mm [0.9 in] | H 52mm [2.0 in] | H 55mm [2.2 in] | H 65mm [2.6 in] |
| G ½(from outside) | 35 mm[1.4 in] | - | - | - | - | - |
| G ¾(from outside) | 35 mm[1.4 in] | - | - | - | - | - |
| G 1 (from outside) | 35 mm[1.4 in] | 25 mm[1.0 in] | 35 mm[1.4 in] | - | - | - |
| G 1 ½(from outside) | - | - | - | 45 mm[1.8 in] | - | - |
| G 2 (from outside) | - | - | - | - | 55 mm[2.2 in] | 65 mm[2.6 in] |
| G ⅜B(from inside) | 20 mm[0.8 in] | 20 mm[0.8 in] | 25 mm[1.0 in] | 50 mm[2.0 in] | 55 mm[2.2 in] | 60 mm[2.4 in] |
| G ½B(from inside) | 20 mm[0.8 in] | 20 mm[0.8 in] | 25 mm[1.0 in] | 50 mm[2.0 in] | 55 mm[2.2 in] | 60 mm[2.4 in] |
Dead band inmm
| Outer diameter float ∅D | ∅18mm [0.7 in] | ∅25mm [1.0 in] | ∅25mm [1.0 in] | ∅44mm [1.7 in] | ∅55mm [2.2 in] | ∅55mm [2.2 in] |
|---|---|---|---|---|---|---|
| Float height H | H 32mm [1.3 in] | H 17mm [0.7 in] | H 23mm [0.9 in] | H 52mm [2.0 in] | H 55mm [2.2 in] | H 65mm [2.6 in] |
| T2 | 30 mm[1.2 in] | 30 mm[1.2 in] | 25 mm[1.0 in] | 40 mm[1.6 in] | 45 mm[1.8 in] | 55 mm[2.2 in] |
| Logo | Description | Country |
|---|---|---|
| EU declaration of conformity ■ Low voltage directive ■ RoHS directive | European Union |
| Logo | Description |
|---|---|
| - | China RoHS directive |
| 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
Level measurement of liquids in machine building
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