Mineral Insulated Resistance Thermometers:-
High Accuracy and Stability
No Compensating Cable
No Cold Junction Compensation
Platinum Resistance Sensors offer the highest standard of accuracy and stability of any temperature sensor. They also exhibit good linear response, covering a temperature range from -200ºC to +650ºC. They are easy to apply and require no special cables or cold junction reference. Platinum resistance sensors are finding increasing favour in industry, where their high accuracy, repeatability and stability are vital. Our minerally insulated RTDs are manufactured from superior grade materials. In addition we provide technical expertise, advice, design and a manufacturing facility second to none.
The following types of RTD are available:
Tables of resistance values for PT100 RTDs are available from Jagjan. Refer to Technical Data Sheet JAG/PTT.
DIN : 43760
A wide range of sizes are available, down to as small as 1.5 mm diameter. Duplex executions are produced in several sizes.
Jagjan Temperature Detectors are capable of withstanding vibration and acceleration levels of up to 30g over the frequency range 10Hz to 1kHz. Detector accuracy will remain unaffected by large changes in pressure.
Detectors are available as standard in tolerance classes A and B.
Sheaths and Conductors:-
RTDs are available in 2, 3 or 4 wire configurations with a range of sheath materials and conductor materials. Standard sheath materials include 316 Stainless Steel, 310 Stainless Steel and Inconel 600. For high temperature applications, a nickel sheath is preferred. Conductors are usually either silver plated copper or silver. The tables below show the most common sheath/conductor combinations. These are readily available from Jagjan.
High Temperature RTDs :-
At temperatures above 500ºC, the platinum wires used in the construction of RTD elements are susceptible to poisoning from a variety of sources. The result is rapid drifting of the reading, normally upwards. The most common causes are:-
The sheath material - iron vapour contamination effectively rules out the use of stainless steels and most nickel alloys. Pure nickel is the preferred material.
Oil and grease traces of oil left inside the protecting tube, or on the element itself, give off poisonous gases at high temperature. Absolute cleanliness is essential in RTD production.
Tolerances for PT100 Resistance Temperature Detectors are shown below in tabular and graphical format.
Fittings :- A wide range of termination glands and adjustable compression fittings are available to suit RTDs of all diameters.
Transmitter Baseplates :-
Moulded Plugs :-
Both standard and miniature connections can be supplied in socket end versions. An alternative range of high temperature plug and socket combinations is available with ceramic bodies.
Standard Seals :-
Maximum ambient temperature is 85ºC when fitted with PVC tail wires and 180ºC when fitted with PTFE tail wires and high temperature epoxy.
Threaded Seals :-
The B Pot is an M10 threaded epoxy resin seal for 4.5 mm and 6.0 mm, or 8.0 mm RTDs. Locknuts can be supplied. Maximum ambient temperature is 85ºC when fitted with PVC tail wires and 180ºC when fitted with PTFE tail wires and high temperature epoxy.
Wiring Configurations :-
2-Wire Connection :-
3-Wire Connection :-
4-Wire Connection :-
4-Wire Compensated :-