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  • Parameters

Technical Data

NTL 77-M (NTL 77)
Switch difference5%RH (±3%RH tolerance) at +25℃(+77℉),50%RH
Reaction time5 sec.
Contact typechange-over contact(relay)
Service life>50,000 cycles
Max. switching capacity (relay output)240VAC/120VAC 8(1.6)A
Max. inrush currentAC 16A for 10 sec.
Optical indicatorLED

5-pole terminal, clamping torque 0.5Nm max.: rigid/stranded wire 2.5mm² 

(AWG 14)

Mountingclip for 35mm DIN rail,EN 60715
Casingplastic according to UL94 V-0,light grey
Fitting positionFitting position
Operating/Storage temperature0 to +60℃(+32 to +140℉)/-20 to +70℃(-4 to +158℉)
Operating/Storage humiditymax.90%RH(non-condensing)
Protection typeIP20

¹ When connecting with stranded wires, wire end ferrules must be used.

Art. No.Setting RangeOperating Voltage
86066440 to 90% RH230VAC, 50/60Hz
86066540 to 90% RH120VAC, 50/60Hz
  • Features

> Adjustable and pre-set relative humidity

> Status indicator (LED)

> High switching capacity

> Clip fxing

> Temperature-compensated

  • Structure Chart

Electronic Hygrostat

  • Certification
  • Thermostat CE-EMC

    Thermostat CE-EMC

  • Thermostat CE-LVD

    Thermostat CE-LVD

  • Thermostat RoHS

    Thermostat RoHS

  • Thermostat RoHS

    Thermostat RoHS

  • Hygrostat NT 77-M Patent

    Hygrostat NT 77-M Patent

  • Application

The electronic hygrostat senses the relative humidity in an enclosure with electric/electronic components and turns on a heater at the set point, helping prevent the formation of condensation in the enclosure. The LED integrated in the adjustment knob is lit when the connected heater is in operation.

  • Video

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