HTX datasheet(25/36 Pages) RMT

25 / 36 page

OPERATING MANUAL. HTX SERIES

Page 25 of 36

Sensor series

dS/dT, %

Ta, K

HTX

1,937E-03

-1,634E-05

0,20

300

HFX

2,299E-03

-2,094 E-05

0,25

300

HRX

2,299E-03

-2,094 E-05

0,25

300

Temperature range of calibration -40…+80 °С

Common formula

�� = ��0 × [(A2 × (�� − ��0 )2 + A1 × (�� − ��0) + A0)]

Thus, to obtain the temperature correction, you need to know average

temperature T of measurement. The Sensors of the HTX series have

atemperature Sensor integrated. You can use a measured value of the

average temperature by the thermistor directly to get temperature

corrections of the Heat Flux Sensor.

If a Heat Flux Sensor without an integrated temperature Sensor is used

(the HFX and HRX series) you need to apply an external temperature

Sensor.

If T is not measured, it can be approximated by the following formula:

�� =

��ℎ + ��

(9.6)

where Th and Tc are the respective temperatures of the hot and the

cold sides of the Sensor.

Typically, the difference between Th and Tc is small. If the Sensor is

mounted onto the hot surface, T is better approximated by T = Th.

Example for calculating

The Sensor type HTD04-126-05D20 was taken for measurements.

The Sensor is mounted on a warm surface and is exposed to air. The

surface has a temperature of 50°C, which is a good approximation for T

(see the last section).

The following Sensor parameters are given in its specification (Chapter 3.

Specifications):

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