Thermocouples ANSI
Fine Wire Versatile Exposed Junction Thermocouples ANSI
An exposed junction thermocouple is the simplest form of thermocouple. It consists of two pieces of thermocouple wire joined together with a welded bead. Since they can be made very small, an exposed junction thermocouple can provide a very fast response time.
Fast Response Mineral Insulated Thermocouples ANSI
0.25mm, 0.5mm, 0.75mm & 0.81mm Fast Response Mineral Insulated Thermocouples in various styles.
Mineral Insulated Thermocouples ANSI
1mm, 1.5mm, 3mm & 6mm Durable Mineral Insulated type thermocouples to suit a wide range of temperature measurement. Various probe types, lengths and diameters available.
Magnet Thermocouples ANSI
A selection of Magnet Thermocouples in ANSI calibration. 0.7kg to 11.8kg pull strength magnets are available.
Thermocouples with Moulded-on Plugs ANSI
A moulded plug gives a robust construction as well as providing a waterproof termination.
Hermetically Sealed Wire Thermocouples ANSI
An IP67 wire thermocouple that is hermetically sealed for use in corrosive or wet environments.
This versatile multi-purpose sensor has been specifically designed for use in and to protect against corrosion in harsh or wet environments. It has a quick response time and can be easily cleaned. The impermeable PFA insulated flexible wire thermocouple provides exceptional resistance to oils, fluids, gases, and chemicals and is electrically isolated.
Cant find what your looking for?
Please complete our custom configurator forms and send us your specific requirements and build your own sensor.
We are specialists in the design and manufacture of custom-built temperature sensors. Quality and Service are key elements in the continued growth of Labfacility; technical support for both sensing and instrumentation is always freely available from our experienced technical sales teams.
Comparison of Sensor Types
| Thermocouple | Platinum Resistance Thermometer | Thermistor | |
|---|---|---|---|
| Sensor | Thermoelement, two dissimilar metals/alloys |
Platinum-wire wound or flat-film resistor | Ceramic (metal oxides) |
| Accuracy (typical values) | 0.5 to 5.0°C | 0.1 to 1.0°C | 0.1 to 1.5°C |
| Long term Stability | Variable, Prone to ageing | Excellent | Good |
| Temperature range | -200 to1750°C | -200 to 650°C | -100 to 300°C |
| Thermal response | Sheathed – slow Exposed tip – fast 0.1 to 10 secs typical | Wirewound – slow Film – faster 1-50 secs typical |
generally fast 0.05 to 2.5 secs typical |
| Excitation | None | Constant current required | None |
| Characteristic | Thermovoltage | PTC resistance | NTC resistance (some are PTC) |
| Linearity | Most types non-linear | Fairly linear | Exponential |
| Lead resistance effect | Short cable runs satisfactory | 3 & 4 wire – low. 2 wire – high | Low |
| Electrical “pick-up” | susceptible | Rarely susceptible | Not susceptible |
| Interface | Potentiometric input. Cold junction compensation required | Bridge 2,3 or 4 wire |
2 wire resistance |
| Vibration effects/ shock | Mineral insulated types suitable | wirewound – not suitable. Film – good | Suitable |
| Output/ characteristic | From 10µV/°C to to 40µV/°C depending on type |
approx. 0.4 W/°C | -4% / °C |
| Extension Leads | Compensating cable | Copper | Copper |
| Cost | Relatively low cost |
Wirewound – more expensive Film – cheaper |
Inexpensive to moderate |
Comments and values shown in this chart are generalised and nominal. They are not intended to be definitive but are stated for general guidance.