The WM 500/550 is an ON/OFF controller provided only of a selectable setpoint.

• Housing: ABS plastic, autoestinguish
• Dimensions: front 75x108 mm (2.953x4.252”), depth 49 mm (2”)
• Mounting: wall mount, with fixing screws
• Display: 10 mm LED (WM 550 only)
• Setpoint: adjustable by rotating knob with marked dial of an anatomic design
• Output: one (1) SPDT relay 8(3)A 250V AC
• Input: for EWHS 28 probe
• Accuracy: better than 1% R.H.
• Power supply (depending on model): 12 Vac/dc or 24, 110, 220 Vac, 50/60 Hz