Platinum-chip temperature sensors are based on a temperature-dependent resistance whose development and permissible tolerance is defined in the international standard EN 60 751. They combine the favorable properties of a platinum temperature sensor with the advantages of large-scale production. Their distinctive features are standardization and universal interchangeability, as well as high measurement accuracy, excellent long- term stability and good reproducibility of the electrical properties. Furthermore, prices have fallen considerably in recent years, since these sensors are designed to meet large- quantity requirements. With regard to the price, platinum-chip temperature sensors are therefore a genuine alternative to thermistors, which are based on semiconductors.
Platinum-chip temperature sensors, M version, provide the ultimate solution to most application tasks. The temperature sensors feature a particularly wide temperature range, extending from -70 to +550°C. A large selection of different versions is available ex-stock. Miniaturized versions can also be supplied, which considerably facilitate fabrication for locations where space is at a premium. Of particular advantage is the special covering layer procedure adopted for this version, allowing unprotected use under humid ambient conditions. Typical application examples can be found in HVAC engineering, and in industrial humidity measurement.
N 60 751
= 3.850 x 10-3 °C-1 (between 0 and 100°C)
-70 to +550°C
Temperature validity range Class 1/3 DIN B: -50 to +200°C
Temperature validity range Class A: -70 to +300°C
Temperature validity range Class B: -70 to +550°C
Pt100 recommended: 1.0mA maximum: 7mA
Pt500 recommended: 0.7mA maximum: 3mA
Pt1000 recommended: 0.1mA maximum: 1mA
This version of platinum-chip temperature sensors may not be used unprotected in corrosive atmospheres. They must also not be immersed directly in liquids. The user may have to carry out some checks before operation.
These temperature sensors feature connecting wires made from sheathed platinum wire with a nickel core. The connecting wires are suitable for crimp/weld and hard-soldered joints. During further processing, it is essential to ensure that the connections are not subjected to lateral pressures. The horizontal tension on the individual connecting wire must not exceed the maximum value of 10N. Any unnecessary bending of the connecting wires must be avoided as this may result in material fatigue and a wire break.Longer connecting wires up to 300mm length (in one piece) can optionally be fitted. Alternatively, silver wire or insulated stranded wires of whatever length is required can be used as extensions at a later time. Please note that there may be restrictions on the application temperature.
The nominal value specified refers to the standard connecting wire length L1. The measurement is acquired 2mm from the open end of the wire. If the wire length is altered, changes in resistance will occur which may result in the tolerance class not being met.
max. R0 drift 0.05%/year
Taking into account nominal value drifts and hysteresis effects that may occur within certain limits, temperature measurements down to -200°C are also possible. Further details can be obtained on request.
>10MΩ at room temperature
∆t = I2 x R x E
In the standard belt packaging, JUMO temperature sensors, PCA/M style, can be stored for at least 12 months under normal ambient conditions. It is not permissible to store the sensors in aggressive atmospheres, corrosive media, or in high humidity.