Product Specifications

Refrigeration Probe Series

The 11J and 12J NTC Thermistor Probes offer economical, reliable and accurate solutions to those refrigeration applications requiring more extensive sensing than the one or two temperature points typically offered by a bimetallic thermostat. The 11J and 12J provide a change in resistance with temperature that when combined with an electronic circuit provides a means of continously measuring temperature over a very wide range.

Applications

• Refrigeration Systems
• Freezer Compartments
• General Purpose Applications

Features & Benefits

• High Reliability
• Low Cost
• One-Piece Design
• Fast Response

Operating Principle of NTC Thermistors

NTC thermistors are semiconductor ceramics made with various metal oxides. Their electrical resistance decreases with increasing temperature. This resistance is processed by an electronic circuit to provide temperature measurement. While a bimetallic thermostat provides both temperature sensing and electrical circuit control, the thermistor itself does not provide any control over heating elements, relays, etc. The thermistor is strictly a sensor and any electrical control would need to be implemented by the circuit utilzing the thermistor.