Thermometer replacement RTD temperature sensor assemblies are used when converting instrumentation from older direct reading thermometers to electronic instruments requiring RTD inputs. These RTD assemblies replace the filled system capillary actuating bulbs and will fit into the old existing bulb wells as listed below. These 3-wire constructed sensor assemblies consist of a high-accuracy platinum element sealed inside a spring-loaded 316 stainless steel sheath and is supplied with a FDA compliant white thermoplastic gasketed head. Each sensor is supplied with a free rotating stainless steel mounting fitting with the appropriate threading for the wells listed below.
| Element Material | Platinum |
| Reference Resistance | 100 Ohms (Most Common) |
| # of Lead Wires Per Element | 3 |
| RTD Temp. Coefficient (Alpha) | 0.0038 # |