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Description of Stem Thermostat
Thermostat with single pole stem control and double pole safety limiter
Features of Stem Thermostat
- Combined control and safety function
- bimetal for independant non self resetting safety option
- Direct plug-in to heating element to reduce wiring and mounting costs
- Tamper proof housing
- Factory pre-set fixed temperature, OEM adjustable or end-user adjustable temperature
- Connection for signal lamp
Operation of Stem Thermostat
The differential expansion of the sensing element causes the opening of a snap-action switch in the thermostat head. In case of abnormal temperature rise, the patented MFS technology in the stem or traditional bimetal ensures double pole safety. The limiter is manually resettable.
Technical Characteristics of Stem Thermostat
| Type |
BHA 279 |
| Temperature range |
20°C to 70°C |
| Differential |
5% of the temperature range |
| Safety limiter temperature |
Fixed 120°C |
| Rating |
20A-250V |
| Material |
Brass, invar, bimetal |
| Capillary length |
180,270mm/7,11" |
| Sensing element diameter |
6 mm |
| Maximum head temperature |
115°C |
| Connections |
Brass faston |
| Approvals |
CE as per IEC - 60730 |
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