Electronic Hygrostat
DCF 010 | DC 20 to 56 V

  • High DC switching capacity
  • Adjustable humidity
  • Small hysteresis
  • Optical operating display (LED)
  • Integrated switch module
  • Precise measurement via an external sensor

The electronic DC hygrostat with integrated switch module is used to control heating and cooling equipment, filter fans or signal devices through the relay. The hygrostat measures the relative humidity  and can switch a signal current via an internal relay. The external sensor can be positioned freely anywhere in the control cabinet for precise measurement of the atmospheric humidity. Additionally, this hygrostat is available in versions that not only measure the relative humidity via the external sensor, but also the temperature.

Switching difference (humidity)4 % RH (±1 % tolerance) at +77 °F (+25 °C), 50 % RH
Reaction timeapprox. 5 sec.
External sensorcable 2 m with snap in connector (included in the delivery)
Contact typecontact maker NO (MOSFET) or contact breaker NC (MOSFET)
Service life> 100,000 cycles
Operating voltageDC 20 to 56 V
Optical indicatorLED
Connection6-pole terminal: stranded wire1 AWG 16 (1.5 mm²);
max. AWG 12 (2.5 mm²)
Mountingclip for 35 mm DIN rail, EN 60715
Housingplastic, UL 94V-0, grey (bicolor)
Dimensions3.7 x 2.1 x 1.7" (93 x 53 x 44 mm)
Weightapprox. 4.2 oz. (120 g) incl. sensor
Mounting positionvertical
Storage temperature-40 to +176 °F (-40 to +80 °C)
Operating/Storage humiditymax. 90 % RH (non-condensing)
Protection typeIP20
ApprovalsUL File No. E164102, VDE, EAC
Noteother versions on request

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

Part No. Max. switching capacity
(relay output)
Operating temperaturePrimary switching function -
setting range humidity
Secondary switching function² -
Switch-on temperature
Contact (primary)
01012.0-20DC 15 A-22 °F to +104 °F
(-30 °C to +40 °C)
40 to 90 % RH+41 °F (+5 °C) pre-setContact maker (NO)
01012.0-21DC 13 A-22 °F to +104 °F
(-30 °C to +40 °C)
40 to 90 % RH+41 °F (+5 °C) pre-setContact maker (NO)
01012.0-22DC 11 A-22 °F to +104 °F
(-30 °C to +40 °C)
40 to 90 % RH+41 °F (+5 °C) pre-setContact maker (NO)

² Versions with secondary switching function can also register the temperature and therefore offer an additional protection for electronics.
Switching difference: 3 K (±1 K tolerance) at +77 °F (+25 °C), 50 % RH.

Dimensioned Drawing

Electronic Hygrostat DCF 010
External sensor