Conductive Probe Level Control Relay 24VAC

In stock (3 items available)
  • Weight
    0.09 kg
  • SKU
    NTC-002

The MOD-W-1 is a DIN Rail mount liquid level control relay powered from 24 VAC. It features adjustable sensitivity and time delay from 0.1 to 10 sec. SPCO output with selectable pump up or pump down modes as well as relay proving function.

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The MOD-W-1 uses a two or three prong conductive probe to control the level of liquid in a tank or other storage container.

The unit is a transformer based conductive probe level control relay, hence available in dedicated AC voltages only. The sensitivity is adjustable from 2 to 100 kΩ, via the on-board potentiometer. Another potentiometer enables the user to adjust the delay on the tripping timer from 0.1 to 10 secs to prevent false activation from liquid movement.The probe supply from the MOD-W1 is an isolated 20 VAC @ 2 mA. The MOD-W1 will work successfully with cables up to 200 m from the probes.

It also features an eight-way function switch (designated A to H) that allows user to switch between "pump up" & "pump down" modes along with a relay proving function "permanent on" or "permanent off". The switch will also determine how the adjustable time delay will function.

The function positions are as follow:

  • A: Pump up, delay on energisation & de-energisation
  • B: Pump down, delay on energisation & de-energisation
  • C: Pump up, delay on energisation
  • D: Pump down, delay on energisation
  • E: Pump up, delay on de-energisation
  • F: Pump down, delay on de-energisation
  • G: Relay proving, permanent on
  • H: Relay proving, permanent off

Function explanation:

  • Regulation of two levels - pump down mode: The relay energises when the high level probe is reached and de-energises when the level falls below the low level probe.
  • Regulation of two levels - pump up mode:  The relay de-energises when the high level probe is reached and energises when the level falls below the low level probe.
  • Regulation of one level - pump down mode: Connect the maximum and the common terminals together. In this case, only a single probe is used and the relay operates when the probe is immersed.

A common reference is always required, if the vessel/tank is conductive the chassis of the tank or vessel will suffice. If the vessel/tank is not conductive a third probe is required to act as the comment reference, which has our SKU: NTS-050

  • Power Supply: 24 VAC
  • Isolation: 2.5 kV @50 Hz
  • Power consumption: 3 VA
  • Sensitivity Range: Adjustable 2 to 100 kΩ
  • Delay on tripping time: Adjustable 0.1 to 10 s
  • Probe Supply: 20 VAC
  • Max Probe Current: 2 mA
  • SPCO Output: 8 A @250 VAC
  • Max Breaking Capacity: 2 kVA
  • Mechanical life: 30 Million ops
  • Electrical life: 200 K ops at max rated load
  • Operating temperature: -20 to 40 °C
  • Storage temperature: -20 to 60 °C
  • Max cable size: 2.5 mm
  • CE marked: Yes
  • In accordance with: EN61000-6-1: 2007, EN61000-6-3: 2007, EN61010-1: 2002
  • Housing material: Thermo plastic ABS (DIN7728)
  • Extinguishable according to UL94VO
  • Manufacturer's Part: MOD-W-1

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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