The ETS300W Waterproof Temperature Switch is a fully sealed mechanical capillary thermostat designed for humid, underwater, splash-prone working conditions. Equipped with integrated IP68 waterproof housing and stainless steel sensing bulb, it automatically switches circuit when reaching preset temperature, providing reliable over-temperature cut-off and alarm protection for marine machinery, water pumps, outdoor motors, hydraulic stations and underground equipment.

No electronic circuit design, strong anti-interference, long service life, easy on-site calibration and installation.

1. IP68 full waterproof & dustproof sealed structure, resistant to splashing, rain and short-term immersion
2. SS304 stainless steel sensing bulb & capillary, anti-rust for water & weak corrosive medium
3. Mechanical liquid-filled temperature sensing system, high repeat accuracy of switch point
4. SPDT single contact as standard, dual contacts customizable
5. Wide adjustable temperature range, factory preset temperature available on request
6. Compact size, surface & pipe clamp dual installation methods
7. Low failure rate, suitable for long-term continuous outdoor operation

   Item	Standard Parameter
   Model	ETS300W
   Product Type	Waterproof capillary mechanical temperature switch
   Protection Grade	IP68 Waterproof & Dustproof
   Wetted Material	SS304 Stainless Steel bulb & capillary
   Switch Contact	SPDT single / dual, AC220V 5A / 10A
   Temperature Adjust Range	-20℃ ~ 120℃ (custom range supported)
   Ambient Working Temp	-30℃ ~ +75℃
   Housing Material	Sealed ABS / Cast aluminum waterproof shell
   Custom Capillary Length	0.5m – 15m
   Installation	Pipe clamp / surface direct mount

   Application Scenarios
   • Marine ships, underwater auxiliary machinery
   • Water pump, sewage pump, submersible motor overheat protection
   • Outdoor fan, generator, construction machinery gearbox
   • Hydraulic station, water cooling unit, refrigeration equipment
   • Outdoor pipeline, agricultural irrigation equipment