PTS 481 and PTS 491 up to 400 °C with IP 68 with Programmable Converter 4–20 mA

These resistance-type sensors are intended for contact measurements of temperatures up to 400 °C. Temperature sensors, in combination with a central holder or thermowell, can be used to measure the temperature in various applications of an industrial environment. The sensor variant with welded thread is ideal for direct measuring of mediums in ducts. The sensors meet the level of protection IP 68 in accordance with EN 60529. The standard operating temperature range is -50 to 400 °C. The sensors can be utilised for any control systems that are compatible with output signal 4 to 20 mA.

The sensors are designed to be operated in a chemically non-aggressive environment.

Specification

Sensor type with smooth stem PTS 481
Sensor type with welded-on screwing PTS 491
Type of sensing element Pt 100
Output signal 4 to 20 mA
Maximum measurement range -50 to 400 °C
Adjustable measurement range optional, minimum interval 10 °C
Accuracy of sensing element class B in accordance with EN 60751
Accuracy of converter temperature error < 0.05 °C
error of setting < 0.12 °C
error of linearity < 0.05 % from the set range, minimum 0.16 °C
influence of supply voltage < 0.005 %/V from the range
Current limitation sensing element < 3.2 mA
sensing element break > 22.7 mA
Lead-in connection recommended 1.5 to 2.5 mm2
Ingress protection IP 68 (1 bar) in accordance with EN 60529
Material of sensor stem stainless steel DIN 1.4301
Standard length of the stem L1 50, 100, 160, 220, 280, 400 mm
Method of programming AY - USB adapter *
Thread types for PTS 491 G 1/2"; M 20 x 1.5; M 27 x 2
Insulation resistance > 200 MΩ at 500 VDC, 25 °C ± 3 °C; humidity < 85 %
Material of connection head aluminium alloy, LIMATHERM B
Operating conditions
ambient temperature:
-25 to 70 °C
relative humidity:
max. 100 % (at the ambient temperature 25 °C)
atmospheric pressure:
70 to 107 kPa
Weight approximately 0.25 kg

* programming software is free

MAXIMUM FLOW SPEED OF THE MEASURED MEDIUM - AIR AND WATER VAPOUR / WATER [m.s-1]
Length of the thermowell / stem > 60 to 100 mm > 100 to 160 mm > 160 to 220 mm > 220 to 400 mm
Values for the version with thread 15 / 1.5 8.0 / 1.0 2.5 / 0.6 0.6 / 0.3

Dimensional Draft

Wiring Diagram

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