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T21 Thermal Differential Switch, low-flow alarm switching, lube oil monitoring, cooling water monitoring
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Product sku:
T21
The T21 point level switch uses a thermal differential technique to measure liquid flow, level or interface by sensing changes in the thermal heat transfer characteristicsof the media where it is located. The sensor consists of a pair
of matched Resistance Temperature Detectors (RTDs) encased in twin 316 series stainless steel tubes. One RTD is self heatedusing a constant DC current. The other sensor is unheated and provides an accurate ambient process temperature reference. The thermal differential created between the heated and reference RTD pair is a function only of the media with which the sensor is in contact. The differential is greatest when no liquid is present (dry condition) and decreases as liquid quenches the switch sensors (wet condition).
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The model T21 point flow switch uses a thermal differential technique to measure liquid or gas flow, level, or interface by sensing changes in the thermal heat transfer characteristics of the media where it is located. The sensor consists of a pair of matched Resistance Temperature Detectors (RTDs) encased in twin 316 series stainless steel tubes. One RTD is self-heated by a constant DC current while the other is unheated, in contact with the liquid, and provides an accurate ambient process temperature. It is adjustable to a specific flow rate.
The T21 is a popular choice for low-flow alarm switching, monitoring lube oil on bearings and gears in rolling mills, and monitoring the flow of cooling water on pump seals.
Wide operating process flow ranges from -100°F to 392°F
Removable, plug-in electronics board
Self-heating sensor design
| Product sku: | T21 |
|---|---|
| Range | (0,003 ... 1,5 m/s) pentru apa (0,03 ...150 Nm/s) pentru aer |
| Process pressure | 200 bar |
| Process Temperature | 200 ° C |
| Output | 1xDPDT |
| Process connection | 3/4", 1" NPT |
| Power supply | 24 Vcc, 230 Vca |
| Fluid type | gases and liquids |
| Type | Thermal Dispersion |
| Brands | SOR inc |