The WL420 is a submersible transmitter designed for continuous liquid level monitoring in various water and liquid applications. It measures static pressure using a durable 316L stainless steel sensor with a proportional 4-20mA signal. A vented cable ensures that readings are compensated for atmospheric pressure changes. Standard cable length is 5m, but longer is available for specific applications.
The WL420 is a submersible hydrostatic level transmitter designed for continuous liquid level monitoring in various water and liquid applications, including wells, reservoirs, and rivers. The 4-20mA loop powered hydrostatic level transmitter will easily integrate with local displays, GSM alarm devices or environmental loggers.
Accurate Measurement: It measures static pressure using a 316L stainless steel diaphragm sensor, converting it to a 4-20mA current signal proportional to the liquid level.
Durable and Compatible: The sensor is compatible with raw and chlorinated water, as well as many semi-aggressive liquids. Any media compatible with Stainless Steel and PUR can be safely used with the WL420.
Versatile Application: Available in multiple measurement ranges and cable long enough to clear the water. The sensor is also compatible with various instrumentation like panel meters, data loggers, and alarm systems.
Submersible Design: Designed for submersion in the liquid being measured.
Atmospheric Compensation: A vented cable compensates for atmospheric pressure changes, ensuring accurate readings. A compensation box can be provided to prevent water ingress, whilst still allowing atmospheric venting. This also allows you to add less expensive standard cable to the sensor and ensures the sensor vents to the same pressure as the water level.
| Pressure Range | From 1 up to 100mWC |
| Cable Length | 5, 10, 15, 20, 30, 40, 50, 80 and 120m |
| Sensor | Piezoresistive Diaphragm |
| Sensor Accuracy | 0.1% F.S. |
| Analog Output | 4-20mA |
| Accuracy | 0.5% F.S. @25°C |
| Cable | Polyurethane (PUR) with Ventilation Tube |
| Temperature Compensation | 0 ~ 10mWC: 0 to ~60°C |
| 10 ~ 200mWC: -10 to ~70°C | |
| Zero temperature coefficient | ±1.5% F.S. (within temperature compensation) |
| Span temperature coefficient | ±1.5% F.S. (within temperature compensation) |
| Mechanical Vibration | 20g (20~500 Hz) |
| Mechanical Shock | 20g (11ms) |
| Insulation | 100 MΩ / 250vDC |
| Response Time | ≤ 1ms (Up to 90% F.S.) |
| Long Term Stability | ±0.2% F.S./year |
| Operating Temperature | 0 to 60°C (If measuring range < 4mWC) |
| -10 to 70°C (If measuring range ≥ 4mWC) | |
| Storage Temperature | -40 to 125 °C |
| Power Supply |
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| Housing Material |
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| Dimensions |
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| Level of Protection | IP68 |
| Overpressure Limit | <=6mWC: 3x F.S. |
| >=10mWC: 2x F.S. | |
| Electrical Protection | Reverse Polarity and Current Limiter |
| Certification | CE, UKCA, RoHS |
| Warranty | 1 Year |
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