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Temperature and humidity adjustable
Wide voltage range
Operating temperature down to -40°C
High switching capacity
Status indicator (LED)
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.
Technical Data
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 type | change-over contact (relay) |
Service life VDE | NO/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 current | AC 30A for 10 sec. |
Optical indicator | LED |
Connection | 5-pole terminal, clamping torque 0.5Nm max.: rigid/stranded¹ wire 2.5mm² (AWG 14) |
Mounting | clip for 35mm DIN rail, EN 60715 |
Casing | plastic according to UL94 V-0, light grey |
Dimensions | 77.5 x 60 x 37.5mm |
Weight | approx. 0.2kg |
Fitting position | vertical |
Operating/Storage temperature | -40 to +60℃ (-40 to +140℉) |
Operating/Storage humidity | max. 90% RH (non-condensing) |
Protection type | IP20 |
¹ When connecting with stranded wires, wire end ferrules must be used.
Art. No. | Setting Range Temperature | Setting Range Humidity | Operating Voltage |
860666 | 0 to +60℃ | 50 to 90% RH | 230VAC, 50/60Hz |
860667 | +32 to 140℉ | 50 to 90% RH | 120VAC, 50/60Hz |
860668 | 0 to +60℃ | 50 to 90% RH | 120VAC, 50/60Hz |
