Pump Seal Leak Relay & Thermistor 24VAC

In stock (2 items available)
  • Weight
    0.25 kg
  • SKU
    NTR-210

11WRSTC pump seal leak monitor relay / water leak detection relay & thermistor monitoring relay features detection of water contamination of oil, detection of water leaks from pipes in buildings, isolated probe supply and LED indication, Also available Klixon version.

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11WRSTC pump seal leak monitor relay / water leak detection relay & thermistor monitoring relay features detection of water contamination of oil, detection of water leaks from pipes in buildings, isolated probe supply and LED indication, Also available Klixon version

The 11 pin plug relay is designed for the monitoring and alarming in applications such as water contamination of the oil within submersible pumps. It works on the conductive probe principle. In a situation healthy condition the output relay is energised, when the presence of water is detected, i.e. in the case of a pump, the seal fails and the oil becomes contaminated the resistance drops. If the resistance falls below the set level output relay will de-energise and the red LED will extinguish. A green LED indicates the connection of the auxiliary supply. Such pumps often have embedded thermistors within the motor winding this relay will also monitor a series circuit of up to 6 thermistors having a total “healthy” resistance not exceeding 1500 Ohms, the output relay will be energised indicated also by a red LED. Should overheating occur the individual resistance of a thermistor will rapidly rise above 3.3 KOhms at which point the normally energised relay/s will de-energise, accompanied by the red LED extinguishing. The relay will re-energise when the circuit resistance drops below 1.8 KOhms. in the event of a short circuit or auxiliary supply loss the unit will de-energise. 

  • Power Supply: 24 VAC (230 VAC optional)
  • Nominal supply tolerance: ±15%
  • Isolation: Via transformer
  • Probe supply: 12 VDC
  • Max probe current: 2 mA
  • Power consumption: 3 VA
  • Sensitivity range: Adjustable 4.7 to 100 kΩ 
  • Response time: 100 ms on make
  • Operating level: 3.3 kΩ  ±5%
  • Reset level: 1.8 kΩ  ±10%
  • Max cold resistance of detection circuit: 1500 Ω 
  • Max No. of PTC sensors: 6
  • Sensor voltage: 2.5 VDC max
  • Output contacts: SPCO 10A / 250 V AC1, DPCO 8 A / 250 VAC1
  • Operating temperature: -10 to 60 °C

We carry a selection of the full range of options listed in the datasheet. Non-stocked configurations may be available but may be subject to minimum order quantities or different pricing. Contact Us for more information

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

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By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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