Airflow Monitor

In stock (7 items available)
  • Weight
    0.1 kg
  • SKU
    HEC-020

The airflow monitor (NC/NO) is designed to indicate the loss of air movement of a fan or filter fan. Comes mounted on a 120x120 mm black plastic grill

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The airflow monitor (NC/NO) is designed to indicate the loss of air movement of a fan or filter fan. The contact detects the loss of air movement caused by fan failure or blocked filter media regardless of direction of air. Its simple mechanical operation makes it a viable alternative to electronic monitoring systems.

The product of switching voltage and switching current must not exceed 10 W. The max. voltage and max. current must not be exceeded, not even short-term (voltage/current peaks). The resulting voltage and current peaks of inductive or capacitive loads must be restricted by a contact protection circuit.




  • Max Switching Voltage:NC: 240 VDC (UL), 240 V AC/DC (VDE) / NO: 60 VDC
  • Max Switching Current: NC: DC 500 mA / NO: DC 170 mA
  • Max. Switching Capacity: 10 W (resistive load)
  • Switching threshold air velocity: > 2.5 m/s (hysteresis: > 1 m/s)
  • Max. airflow velocity: 50 m/s
  • Service Life: > 100 000 cycles
  • Max Air Humidity: 70% RH (not precipitating)
  • Connections: 2 x single strand AWG 28, length 500 mm
  • Mounting: alternatively integrated in protective grille (see table), mounting clamp or mounting clip
  • Casing: plastic according to UL94-HB, black
  • Dimensions: 34 × 17.5 × 7.5 mm
  • Weight: ~90 g
  • Operating Temperature: -20 to +50°C
  • Ingress Protection Rating: IP20
  • Approvals: VDE + UL File No. E250507

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

Full Terms and Conditions

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

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