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  • Parameters

Electronic Hygrotherm NT

NT 78-M
Switch difference

temperature: 2K (±1K tolerance) at +25℃ (+77℉), 50% RH

humidity: 4% RH (±1% tolerance) at +25℃ (+77℉), 50% RH

Reaction time (humidity)approx. 5 sec.
Contact typechange-over contact (relay)
Service life VDENO/NC > 15,000 cycles; UL: NO/NC > 30,000 cycles
Max. switching capacity (relay output) 240VAC, 10(1.6) A / 120VAC, 15(1.6) A
Max. inrush currentAC 30A for 10 sec.
Optical indicatorLED
Connection5-pole terminal, clamping torque 0.5Nm max.: rigid/stranded¹ wire 2.5mm² (AWG 14)
Mountingclip for 35mm DIN rail, EN 60715
Casing plastic according to UL94 V-0, light grey
Dimensions77.5 x 60 x 37.5mm
Weightapprox. 0.2kg
Fitting positionvertical
Operating/Storage temperature -40 to +60℃ (-40 to +140℉)
Operating/Storage humidity max. 90% RH (non-condensing)
Protection typeIP20

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

Art. No.Setting Range TemperatureSetting Range Humidity Operating Voltage
8606660 to +60℃50 to 90% RH230VAC, 50/60Hz
860667+32 to 140℉ 50 to 90% RH120VAC, 50/60Hz
8606680 to +60℃50 to 90% RH120VAC, 50/60Hz

  • Features

• Temperature and humidity adjustable

• Wide voltage range

• Operating temperature down to -40°C

• High switching capacity

• Status indicator (LED)

  • Structure Chart

Electronic Hygrotherm NT

Electronic Hygrotherm NT

  • Certification
  • Application

The electronic hygrotherm senses the ambient temperature and relative humidity in an enclosure with electric/electronic components and turns on a heater (or alternatively a fan) at either set point, helping prevent the formation of condensation in the enclosure. Due to its wide voltage range the hygrotherm can be utilised anywhere in the world.  The LED integrated in the adjustment knob on the active controller is lit when the connected device is in operation.

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