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Electronic hygrostat
EFR 012
The hygrostat is used to prevent condensate and monitors the relative humidity in enclosures and casings. When the set value is reached, the heating is switched on and the integrated LED lights up.
- Adjustable or fixed relative air humidity
- Visual status display (LED)
- High switching capacity
- Temperature-compensated
- Clip mounting





Overview technical data
Device name | Electronic hygrostat |
Device type | Hygrostat |
Series | EFR 012 |
Contact type | Relay |
Protection type | IP20 |
Operating display | LED |
Casing | Plastic to UL94 V-0, light grey |
AC/DC | AC |
Inrush current maximum | 16 A |
Inrush current duration | 10 s |
Power consumption | 1 W |
Switching capacity | 8 (1.6) A (AC) 100 W (DC) |
Switching current ohmic | 8 A |
Reference voltage ohmic maximum | 240 VAC |
Reference voltage 2 ohmic maximum | 120 VAC |
Switching current inductive | 1.6 A |
Reference voltage inductive maximum | 240 VAC |
Reference voltage 2 maximum | 120 VAC |
Switching current dc ohmic | 4.2 A |
Reference voltage dc ohmic maximum | 24 VDC |
Minimal switching capacity | 0.3 W |
Reference voltage minimum | 5 V |
Switching current | 5 mA |
Reaction time | 5 s |
Service life | >50000 cycles |
Switching differential | 5 % RH |
Switching differential tolerance | ± 3 % RH |
Operating temperature | 0 °C - 60 °C |
Operating humidity | ≤90 % RH |
Storage humidity | ≤90 % RH |
Storage temperature | -20 °C - 70 °C |
Torque | 0.5 Nmmax. |
Connection | 5-pole clamp, torque 0.5 Nm max.: Rigid wire/stranded wire with 2.5 mm² wire end ferrule (AWG 14) |
Design | Changer |
Mounting | Clip for 35 mm DIN rail, EN 60715 |
Height | 64.5 mm |
Width | 42 mm |
Depth | 38 mm |
Weight | 70 g |
Note | Switching resistive load (switching inductive load). Wire end ferrules must be used for connections with stranded wires. |
Product variants
Article number | Setting range | Operating voltage minimum | Operating voltage tolerance | Request | CAD | Datasheet |
---|---|---|---|---|---|---|
01245.0-00 | 40 % RH - 90 % RH | 230 V | 01245.0-00-EFR012-Datasheet-EN.pdf | |||
01245.9-00 | 40 % RH - 90 % RH | 120 V | 108 V - 132 V | 01245.9-00-EFR012-Datasheet-EN.pdf | ||
01246.0-00 | 65 % RH | 230 V | 01246.0-00-EFR012-Datasheet-EN.pdf | |||
01246.9-00 | 65 % RH | 120 V | 108 V - 132 V | 01246.9-00-EFR012-Datasheet-EN.pdf |