The OPTITEMP TRA-G20 is a threaded surface temperature assembly (RTD) with spring-loaded tip. The resistance temperature device is suitable for temperature measurement on double-walled pipes, storage tanks or any application where immersion or insertion of the sensor is not desired or possible. It is also commonly used for measuring bearing temperature. The RTD sensor is also suitable for vibrating measuring surfaces as well as surfaces moving up and down. The spring-loaded measuring mechanism is able to move up to 40 mm / 1.57 inch to guarantee surface contact at all times. It features a neck tube (Ø12 mm / 0.47 inch) with 1⁄8 NPT process connection and a stainless steel sheath. The measuring range is -50…+150°C / -58…+302°F.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
Depending on selected device configuration
| Product type | Temperature assembly |
| Product family name | OPTITEMP |
| Product positioning | For surface temperature measurement on double-walled pipes or similar applications |
| Product variants | Standard: OPTITEMP TRA-G20 |
| Measurement variables | Temperature |
| Measurement principle | Resistance (RTD) |
| Measured media | Liquids, Gases, Steam, Solids |
| Assembly with thermowell | No |
| Sensor mounting | Screw-in |
| Measuring insert replaceable | Yes |
| Measuring insert type | Replaceable RTD |
| RTD element type | 1 x Pt100 |
| RTD configuration | 3-wire, 4-wire |
| Tolerance class (according to DIN EN 60751) | A |
| Temperature sensor connection type option | Ceramic terminal block, Flying wires, Temperature transmitter |
| Sheath diameters | Ø4.5 mm / 0.18 |
| Thermowell tip design | Straight |
| Mounting point | Surface |
| Measuring point | Surface |
| Process temperature |
-50…+150°C/ -58…+302°F |
| Wetted parts | Austenitic stainless steel (1.4404/316L) |
| Thread connections |
Male: ⅛ NPT |
