... 12) CERTIFICATES OF CQC AND CE13) Widely used for electric water heater, washer, electric oven,, ice machines, fish ponds, etc.14) ... Temperature RangeDifferenceSensitivityCapillary length(mm)Thermometer Bulb Length(mm)WHD-40 B,E,F,H 0-40°C ≤4.5°C ... 4.5°C ±5°C 300-3000 (40)WHD-250 B,E,F,H 50-250°C ≤8°C ±8°C ... 3000 Φ3×170WHD-320 B,E,F,H 50-320°C ≤10°C ±8°C 300-3000 Φ3×130 Electric Water Heater Thermostat