3 wires waterproof probe thermal resistance Thermocouples
temperature sensor pt100
Description:
As for the thermocouple, we split the word: Pt and 100. Pt is the
chemical symbol for Platinum, 100 is the resistance in Ohm of the
Pt100 at 0 °C. The resistance changes (fearly linear) with
temperature are: 0.385 Ohm/°C for European and 0.392 Ohm/°C for
American elements. So, by measuring the resistance we can calculate
the temperature. Never use a European Pt100 with an American
instrument unless you know that it is set for the right conversion
factor (usually called 'alpha'). In english a Pt100 is also called
a RTD element, meaning Resistance Temperature Detector.
An RTD or Pt100 sensor is connected with two, three or four wires
to the measuring device. we learned that we are in fact measuring
resistance to determine the temperature. Now when measuring the
resistance of the sensing element, we also measure the resistance
of the leads and cables used. This gives an error! To compensate
for this, the three wire type (bridge) is used, giving enough
accuracy in most industrial applications. Even better accuracy is
possible with a four wire Pt100 (laboratory applications). Our
Pt100 panel mounted indicators have an offset compensation when
using two wire sensors.
If you want high accuracy, for example better then 0.5°C between 0
and 100°C, go for the Pt100.
Specification:
Temperature sensor :
1: NTC, R25=10K, B25/85=3435
2 :PT100
3: PT1000
4: Quick Overview
IP68 temperature sensor 0.6m,1.5m,2.5m,3m, 6 m cable, -50 TO 105 °C
The precision reached thanks to the technical solutions adopted in
the development of these sensors and the reliability proven by the
tests performed make NTC probes reliable and affordable transducers
for measuring temperature.
The range of IP 68 temperature sensors now includes TS* series
(with two new immersion sensors, NTC and PT100, PT1000 suitable
exclusively for hydronic applications) and a new pass-through
temperature sensor to be used in the blast chiller applications,
where the sensor is used for measuring the temperature in the
product heart.
Operating tempe. range -50+150°c
Dielectronic strengh 2750V AC for one sec
Thermal time constant MAX 25 sec
Moisture resistant (60°c 95% RH)x1000hours
