EFR012 Electronic Hygrostat DIN Rail Humidity Controller

Key Specifications

Item	Specification
Switching difference	5 % RH (±1 % tolerance) – at 77 °F (25 °C) and 50 % RH
Reaction time	approx. 5 sec.
Contact type	SPDT / change‑over contact (relay)
Service life	> 50,000 cycles
Max. switching capacity (relay output)	8 A resistive / 1.6 A inductive @ AC 120 V / AC 240 V 100 W @ DC 24 V
Max. inrush current	AC 16 A for 10 sec.
Optical indicator	LED
Connection	5‑pole terminal, clamping torque 0.5 Nm max.;solid/stranded wire‑AWG14 max.(2.5 mm²)
Housing	plastic, UL 94V‑0
Mounting	clip for 35 mm DIN rail, EN 60715
Operating / Storage temperature	+32 to +140 °F (0 to +60 °C) / -4 to +158 °F (-20 to +70 °C)
Operating / Storage humidity	max. 95 %RH (non‑condensing)
Dimensions	71 x 42 x 38 mm
Weight	approx. 2.3 oz.(65 g)
Protection type	IP20

EFR012 electronic hygrostat is a DIN‑rail mounted cabinet humidity controller designed for humidity management inside electrical enclosures. It adopts SPDT change‑over relay contact and built‑in LED indicator for working status display.

With small hysteresis and fast 5‑second response time, this hygrostat automatically activates cabinet heaters or cooling fans once the humidity exceeds your preset value, effectively preventing condensation, corrosion and short‑circuit damage to electrical components.

The flame‑retardant UL94V‑0 plastic housing reaches IP20 protection grade. It features compact 71×42×38 mm dimension, 5‑pole wiring terminals and standard 35 mm DIN rail clip installation, widely used in power distribution cabinets, control boxes and energy storage enclosures.