Our PPL15-T mineral insulated thermocouple is similar to our PPL3 style sensor but due to its construction is suitable for more demanding applications. We recommend a mineral insulated construction wherever the temperature is elevated, where there is vibration present or where the customer requires the probe to be flexible. It is suitable for the measurement of liquids and gases across a wide temperature range. All sensors are made to order so it is generally possible to meet all of your requirements.
The plain stem of the probe is made from a choice of grades of stainless steel (321, 310, 316), Inconel 600 or Nicrobell and the tip is TIG welded closed to give a pressure tight housing for the sensor. Mineral insulated thermocouples are available with very small diameter sheaths to give extremely fast response. Many metric and imperial probe diameters are available from 0.5mm upwards. Note that additional support for the terminal head may be required for small diameter stems.
We stock a variety of terminal heads that cover all eventualities. The most popular is the aluminium alloy KNE head that is commonly used in the industry. We do however also offer other materials such as ABS, Nylon, FDA approved Polypropylene and of course 316 stainless steel for the most demanding applications. Most of the our terminal heads have IP ratings of IP67 or IP68.
We can fit a number of options inside the terminal heads that best fit your requirements. The simplest is a terminal block allowing you to connect directly to the sensor. Alternatively we can supply temperature transmitters with either a 4-20mA or a 0-10V output. Other options include intrisically safe transmitters or those with HART protocol. We can also fit in-head displays if required.
The PPL15-T is ideal for use with compression fittings or our PPL50-TW pocket making them easy to install in your process. The PPL15 is also available as an RTD/PRT sensor. We are also able to supply the probe with your choice of thermistor sensor.
Please ask for more information.