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Belimo Duct & Immersion Platinum Temperature Sensor, Model: 22DT-14H

Brand
Belimo
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Description Downloads
Application
HVAC
Brand
Belimo
Model
22DT-14H
Color
Orange, Black
Weight
0.10 kg
Power Supply
15-24 VDC,+-10%,0.5 W
Degree of Protection
NEMA 4X/IP65
Multirange
8 measuring ranges selectable
Media
Air/Water
Accuracy Temperature Active
+-0.5 degree C @ 21 degree C
Availability
In Stock
Belimo Duct & Immersion Temperature Sensor. Active sensor (4-20 mA) for measuring temperature in duct applications.
In connection with a stainless steel or brass thermowell also applicable for pipe applications. 50mm probe length. 6mm probe dia. Selectable temperature range from -50 C to 160 C.

Build-up of Self-Heating by Electrical Dissipative Power:
  • Temperature sensors with electronic components always have a dissipative power which affects the temperature measurement of the ambient air. The dissipation in active temperature sensors shows a linear increase with rising operating voltage. This dissipative power should be taken into account when measuring temperature. In case of a fixed operating voltage (±0.2 V) this is normally done by adding or reducing a constant offset value. As Belimo transducers work with a variable operating voltage, only one operating voltage can be taken into consideration, for reasons of production engineering. That means, that at this voltage, the expected measuring error of the output signal will be the least. For other operating voltages, the offset error will be increased by a changing power loss of the sensor electronics. If a re-calibration should become necessary later directly on the sensor, this can be done by means of a trimming potentiometer on the sensor board.

General remarks concerning sensors:
  • When using lengthy connection wires (depending on the cross section used) the measuring result might be falsified due to a voltage drop at the common GND-wire (caused by the voltage current and the line resistance). In this case, 2 GND-wires must be wired to the sensor - one for supply voltage and one for the measuring current. Sensing devices with a transducer should always be operated in the middle of the measuring range to avoid deviations at the measuring end points. The ambient temperature of the transducer electronics should be kept constant. When switching the supply voltage on/off, onsite power surges must be avoided.

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