Level Control Panels and Sensors
Level control panels and sensors are auxiliary equipment that convert contact or analogue signals from level devices into pump, valve and alarm control. They let a magnetic indicator, electrode or switch be connected to an automatic fill-and-drain system.
The group includes reed-contact monostable and bistable switches, a two-relay control panel, a converter panel giving 4–20 mA or 0–10 V output, a liquid level relay with adjustable sensitivity and a time relay. Selection depends on the sensor output type and the load to be controlled.
Main Applications
- Pump control with switches on magnetic indicators
- Level relays in electrode systems
- Analogue level signal to SCADA and PLC
- Fill-and-drain automation
- Delayed pump control (time relay)
Technical Data
| Switch type | Reed contact, potential-free; monostable or bistable |
|---|---|
| Switch contact (AC) | Max. 250 V / 1 A / 60 VA |
| Switch contact (DC) | Max. 250 V / 0.5 A / 30 VA |
| Switch temperature | −10 °C … +80 °C |
| Sensing element | Plastic (up to 80 °C) or metal (above 80 °C) |
| Two-relay panel | 230 V supply, about 3 W; 2 relays, NO / COM / NC |
| Proportional output | 4–20 mA or 0–10 V; 24 V DC supply |
| Liquid level relay | Adjustable sensitivity, 110–230 V AC (product range) |
| Signal cable | 0.75 mm² shielded cable recommended |
Material Options
| Part | Function |
|---|---|
| Monostable switch | Changes contact as the float passes, then returns |
| Bistable switch | Remembers last position, suited to alarms |
| Two-relay panel | Starts and stops a pump with two level points |
| Converter panel | Turns level into a 4–20 mA or 0–10 V signal |
| Liquid level relay | Converts electrode signal to relay output |
Which material? Switch contacts are for low-power signals; loads such as pumps are controlled through the two-relay panel or a contactor. Shielded cable on analogue signal lines prevents interference.
Advantages
Ready Automation
- Layer linking sensor to pump
Analogue Output
- 4–20 mA and 0–10 V option
Flexible Control
- Monostable and bistable switches
Delay Option
- Stable control with a time relay
Construction and Design Features
- Reed-contact switches fitted to indicators
- DIN-rail relay and converter panels
- Liquid level relay with electrode inputs
- Shielded signal connections
Write the level device you use and the control required; we will choose the right switch, panel or relay together.
How to Choose?
- Identify the sensor outputClarify contact, electrode or analogue signal.
- Define the controlWrite pump, valve or alarm control.
- Select the deviceChoose a relay panel, converter or level relay.
- Plan the wiringUse shielded cable on analogue lines.
Complementary Products
Why ORFA?
Other Level Control Devices
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Details →Capacitive Level Sensors
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Details →Solids Level Switches
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Plastic Level Switches
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Details →Radar Level Transmitters
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Reflex Glass Level Gauges
Reflex glass level gauges show the liquid level clearly in steam boilers and pressure vessels.
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Level Indicators
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Liquid Level Electrodes
Liquid level electrodes detect the level of conductive liquids by electrode contact and send a signal to the level relay.
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Float Level Switches
Float level switches change contact by means of a float moving with the liquid level and control a pump or alarm.
Details →Float Valves
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Tank Level Switches
Tank level switches signal at set levels in storage tanks to control filling, emptying and alarms.
Details →Get a quote for your project
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