Liquid Level Relays Selection Guide: Technical Criteria & Application Standards
Liquid Level Relays selection guide: technical parameters, mounting and compliance standards, and Tense, Entes, Schneider Electric comparison.
A liquid level relay is an electronic relay that detects the level by monitoring the resistance between electrodes immersed in a conductive liquid and controls a pump or valve through a contact output. It is used inside panels in applications such as filling water tanks, emptying wells and drainage pits, protecting pumps against dry running, and maintaining the water level in steam iron boilers. The category includes Tense SSR and VSR series and Entes SSRC-04 models; there are types with 220 V AC, 230 V AC and 24 V supply, DIN rail type and V-Otomat housing, liquid sensitivity adjustable between 5 kΩ and 100 kΩ, and types made for steam iron boilers. Choose the relay according to the supply voltage, a sensitivity range suited to the conductivity of the liquid, the filling or emptying function, the number of electrodes and the case type inside the panel. Because sensing relies on conductivity, an electrode relay does not work in liquids with very low conductivity such as oil, fuel and pure water. A liquid level relay only gives on-off information at set points; it is not a level transmitter that measures the level continuously. The Liquid Level Relays category on Welibaba includes 11 active models from leading manufacturers such as Tense, Entes, Schneider Electric.
Key Technical Parameters for Selecting Liquid Level Relays
To specify the right Liquid Level Relays model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Supply Voltage | 220 VAC, 50/60 Hz, 24 V, 24 VDC (izoleli besleme katı) | Verify against project schedule and load calculation |
| Dimensions / Enclosure | DIN ray, Klasik DIN kutu, V-Otomat DIN II kutu | Verify against project schedule and load calculation |
| Supply Type | 220 V AC, 230 V AC | Verify against project schedule and load calculation |
| Functions | Tek Tank Kontrolü, Üst elektrot bekleme | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Control Relays.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Submersible Pump Control Relays, Safety Relays, Photocell Relay Accessories.
Frequently Asked Questions
What is the first parameter to check when selecting Liquid Level Relays?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Liquid Level Relays page to narrow down compatible series.
Which Liquid Level Relays brands are available on Welibaba?
Welibaba currently stocks 11 active models in this category from manufacturers including Tense, Entes, Schneider Electric, complete with verified specifications and unit pricing.
How can I compare Liquid Level Relays models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.