The transformer thermometer with a housing made of high-quality, UV-resistant polyamide (protection class IP 54) has a housing diameter of 80 mm. The measuring system used works according to the liquid expansion principle. The temperature is indicated by a pointer on a white scale with black lettering. The device has an accuracy class of 1.5 similar to DIN EN 13190. The temperature can be read through a Plexiglas pane (PMMA) in °C or °F. The two built-in microswitches can be set independently of one another to the desired switch-off temperature using a screwdriver in the front pane. The device is characterized by a high switching point accuracy of +/-0.7 K in relation to the set switch-off point as the temperature increases. The maximum permissible switching capacity of the built-in changeover contacts is 5 amps / 230 volts AC each. The electrical connection is made via screw terminals and is protected by a cover cap. The switching difference (hysteresis) is approx. 1.5% of the display range. The microswitches automatically switch back to their original state when the temperature falls below the switch-off temperature by this value. The contact adjustment is protected against improper adjustment by a cover, and the thermometer is also equipped with a drag pointer so that the maximum process temperature reached is recorded. The device has an immersion tube with a diameter of 8 mm made of stainless steel (material no. 1.4571) and a brass screw connection. It is attached using a G 1 Form A thread in accordance with DIN 3852/2, the nominal position is max. 90°. The thermometer is used in particular in the transformer industry, but can also be used universally for local temperature measurements of any kind. A decisive advantage is that no additional auxiliary power is required for temperature measurement. The device is RoHS compliant and cadmium-free.
| Property | Value |
| Changeover contact: | 2 |
| Connection: | screw connection |
| Sensor design: | rod sensor |
| Adjustable switch-off temperature: | -20 to 120 °C |
| Adjustable switch-on temperature: | -20 to 120 °C |
| Electronic design: | no |
| Explosion-proof: | no |
| Suitable as a limiter: | no |
| Suitable as a monitor: | yes |
| Suitable as a 2-point controller: | no |
| Device design: | Surface-mounted device |
| Medium temperature: | 138 °C |
| Temperature switching difference: | 2.1 °C |
| Protection class (IP): | IP54 |
| Protection class (NEMA): | other |
