Frost detector ETO-1550

ETO-1550 is a thermostat for economical control of snow-melting systems in outdoor areas, gutters and down pipes. Cold temperatures do not necessarily create ice unless moisture is present. The ETO detects both the outdoor temperature and moisture, and the snow-melting system will normally only be energised when snow or ice occur. ETO is used for control of electric heating cables as well as other heat sources. 

Ground sensor type ETOG-55

Designed for embedding into the surface of the outdoor area.Detects moisture and temperature.  

Gutter sensor type ETOR-55

Designed for mounting in gutters and down pipes etc. Detects moisture only and is mounted in combination with outdoor sensor ETF for temperature detection.  

Outdoor sensor type ETF-744/99

Designed to be fixed on a wall surface. Can also be used separatelyfor temperature detection only.  

Technical data

• Supply voltage : 230 VAC ±10, 50-60 Hz
• Built-in transformer : 24 VAC, 6 VA
• 3 output relays (volt-free contact) : 10A, 10A, 16A
• On/off differential: 0.3°C
• Temperature range  0/+5°C
• Scale adjustment: potentiometer for sensor calibration

• - Position ON: Moisture and temperature
• - Position OFF: only temperature
• Ambient temperature 0/+50°C
• Housing/incI cover IP 20 / IP 21
• Weight 495 g
• Dimensions H/W/D 90/156/45 mm 

• Detection Moisture and temperature
• Mounting Outdoor area
• Housing IP68
• Ambiant temperature -20/+70°C
• Dimensions H32, Ø 60 mm  

• Detection Moisture
• Mounting Gutter and down pipe
• Housing IP68
• Ambiant temperature -20/+70°C
• Dimensions 105/30/13 mm  

• Detection Temperature
• Mounting Wall surface
• Ambiant temperature -20/+70°C
• Dimensions 86/45/35 mm