Temperature sensor Pt 500
TFK500
Product categories
Temperature sensor TFK500 consists of two paired temperature sensors and is used together with thermal energy meters to measure the flow and return temperatures. The temperature sensors have a built-in platinum resistor whose electrical resistance changes with the temperature. A measurement of the resistance value therefore results in an analog expression of the temperature. The TFK500 temperature sensor can be connected to the calculator either via a 2-wire or 4-wire connection. With a 4-wire connection, the resistance of the cable has no influence on the temperature measurement.
Heat / Cooling
Smart City
Smart Building
Your benefits
- High accuracy:
Low measurement errors - Short response time:
Accurate instantaneous values - Various versions:
Flexible insert - CH refrigeration approval (METAS) incl. initial calibration:
Approved for use in clearing traffic
Applications
- Temperature detection for heating and cooling measurements in the building services sector
- Temperature detection for energy measurements in billing transactions for district heating supplies
Options
- Head sensor pair TFK500 consists of Pt500 temperature sensors (insert) and various suitable thermowells in lengths of 65, 90, 140 and 180 mm
Properties
- Supplied as a set with two paired temperature sensors
- Immersion sleeve sensor with fast response to temperature changes
- Replaceable Pt500 sensor insert
- High water resistance (IP68)
- Support for adjusting the temperature offset
- Type examination/approval:
- Heat:
Conformity in accordance with the European Measuring Instruments Directive (MID)
- Cooling: CH approval (METAS) incl. initial calibration
Product information
Approvals and calibration
| MID-Zulassung DK-0200-MI004-046 | |
|---|---|
| Temperature range | θ: 2….150 °C |
| Temperature difference | ΔΘ: 3….140 K |
| CH approval (METAS) incl. initial calibration CH-T2-21627 -00 | |
|---|---|
| Temperature range | θ: 2….150 °C |
| Temperature difference | ΔΘ: 3….140 K |
Pairing and calibration according to EN1434-5:2015.
Dimensions
Pt500 temperature sensor (insert)
Thermowell with connection head
Length (L): 65, 90, 140 or 180 mm
Technical data
Area of use
| TFK500 | |
|---|---|
| Component | Pt500 according to EN60751 |
| Time constant τ0.5 with thermowell fitted | Max. 8 s |
| Diameter of the temperature sensor | ø5,8 mm |
| Length of the temperature sensor immersion sleeve | 46 mm |
| Material of the temperature sensor immersion sleeve | AISI 316L, W-.Nr. 1.4404 |
| Cross-section of the silicone cable | 0,22 mm² |
| Length of thermowells | 65 mm, 90 mm, 140 mm, 180 mm |
| Material of the thermowell | AISI 304L, W-.Nr. 1.4306/1.4307 |
| Connection | R½ |
| Material of the connection head | PC |
| Cover material | PC |
| TFK500 | |
|---|---|
| Ambient temperature | -10 °C…70 °C |
| Storage and transport temperature | -25 °C…70 °C |
| Medium | District heating water |
| Medium temperature | 0...150 °C, short-term 160 °C |
| Air humidity | <98 % rH condensing |
| IP class | IP 68 |
| Approved mechanical classes | M1, M2 |
| Approved pressure levels | PN16, PN25 |
| Highest flow rate | 3 m/s |
Assembly examples
Sealing example
Electrical schematic
2-wire
4-wire
Connection cable
MULTICAL® 603 and 803 are MID-approved for 100 m 4-conductor connection cables.
When using the 2-wire connection, the flow and return temperature sensors must be connected with cables of the same length.
Optimizing the accuracy of flow and return temperatures
The heat/cooling meters MULTICAL® 403, MULTICAL® 603 and MULTICAL® 803 have an offset adjustment function that allows the flow and return temperatures to be adjusted by up to ±0.99 K. The value of the offset adjustment is determined by the manufacturer in connection with the factory calibration. If this value is registered in the meter, the deviation of the flow and return temperatures will normally be less than ±0.1 K. Since both the flow and return temperatures are adjusted to the same value, the offset adjustment does not affect the calculation of the energy consumed.
