Optoelectronic level switch
Description
The model OLS-C51 optoelectronic level switch is used for monitoring the level of liquids. The optoelectronic sensor consists of an infrared LED and a light receptor.
The light from the LED is directed at a prism which forms the tip of the sensor. So long as the tip is not immersed in liquid, the light is reflected within the prism to the receiver.
for further approvals see page 4
Optoelectronic level switch, model OLS-C51
When the liquid rises within the vessel and surrounds the tip, the light beam is refracted by the liquid, so that the receiver is no longer or only weakly reached by the light and reacts to this change by triggering a switching operation.
As an explosion-protected version, the model OLS-C51 level switch is designed for medium temperatures up to +135 °C in zone 0 and 1.
Special features
- Application at medium temperatures up to +135 °C
- Mounting position as required
- Accuracy ±2 mm
- Explosion-protected version Ex i
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- Process connectionG 1/2"
- Sealingwithout
- Output Signal4 / 20 mA
- Switch function—
- Electrical connectionCable PUR
- Unit cable lengthmeter
- Cable length—
- ApprovalATEX/IECEx
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| Model | OLS-C51 |
| Product family | OLS |
| Subcategory | optoelectronic |
| Process connection | G1/2" male |
| Process temperature | −30…+135 °C |
| Max process pressure | 40 bar |
| Measurement technology | vibration_fork |
| Output signal | 4...20 mA |
| Power supply | DC 7.5 ... 30 V |
| Electrical connection | PUR cable halogen-free, M16 x 1.5 cable gland |
| Wetted parts material | Borosilicate glass, Stainless steel 1.4571 |
| Ambient temperature | −30…+80 °C |
| IP rating | IP65 |
| Certifications | RoHSCEATEXIECExEMC EN 61326China RoHS |
| Explosion protection | Ex ia IIC T4 Ga/GbII 1/2G Ex ia IIC T4 Ga/GbExi Zone 0/1 gas II 1/2G Exia IIC T4 Ga/GbExi Zone 0/1 gas Exia IIC T4 Ga/Gb |
| Datasheet languages | EN |
| Measurement accuracy | ±2mm |
|---|---|
| Minimum distance from the glass tip to an opposite surface | ≥10mm (≥ 20 mmwith polished surfaces) |
| Mounting position | as required |
| Process connection | G1/2" male |
| Responsiveness | Preset for the detection of aqueous media and oils |
|---|---|
| Medium temperature | -30 …+135 °C |
| Ambient temperature | -30 …+80 °C |
| Operating pressure | 40 bar (4.0 MPa) |
| Materials | |
| ■ Light guide | Borosilicate glass, fixed with epoxy resin |
| ■ Case | Stainless steel 1.4305 (non-wetted parts) |
| ■ Process connection | Stainless steel 1.4571 |
| Electrical data | |
|---|---|
| Power supply | DC 7.5 ...30V |
| Safety-related maximum values | I o = 100mA U o = 30V P=1W |
| Output | 4 ... 20 mA, protected against reverse polarity 'Open': ≥ 4 mAto < 10mA 'Closed': ≥ 12 mAto 18mA Fault: < 4 mA, > 20mA |
| Electrical connection | ■ PUR cable halogen-free ■ Cable length freely definable ■ Diameter: 2 x 0.5mm 2 |
| Output function | 'Normally open' (closed in medium) or 'normally closed' (open in medium) |
| Ingress protection | IP65 |
| Number of switch points | 1 |
| U + | 1 |
|---|---|
| U - | 2 |
View all (7)
| Description | Order number | |
|---|---|---|
| Intrinsically safe repeater power supply, model IS Barrier Input 0/4 ...20 mA, supplying and non-supplying Bidirectional HART ® signal transmission | 14117118 |
| Logo | Description | Country |
|---|---|---|
| EU declaration of conformity ■ EMCdirective EN 61326 emission (group 1, class B) and interference immunity (industrial application) ■ RoHS directive ATEX directive | European Union | |
| ■ Hazardous areas (approved model designation OPG 051) - Ex i Zone 0/1 gas II 1/2G Ex ia IIC T4 Ga/Gb | ||
| IECEx Hazardous areas (approved model designation OPG 051) - Ex i Zone 0/1 gas Ex ia IIC T4 Ga/Gb | International |
| Logo | Description |
|---|---|
| - | China RoHS directive |
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