Browse our sub categories

  • Calibration

Temperature Calibration

If you need to calibrate temperature sensors with a portable calibrator, Isotech has the solution. The industrial range includes calibration solutions for thermocouples, RTDs, thermistors, bi-metalic switches and more - with a temperature range spanning from -100°C to +1200°C. Many calibrators can be used both as Dry or Liquid Baths. With the ever increasing requirement to provide traceable and accredited calibration, a full range of practical, accurate temperature calibration sources has been designed to offer ease of use and optimal performance.

When a temperature calibration application requires a “quick check” or involves smaller sensors, the Isotech range of Fast Calibrators are an ideal choice. Some of the products include:

View Product


The Low Temperature Quick Cal covers the temperature range of -12°C to +140°C, making it ideal for the medical, sterilisation and food industries.

The High Temperature Quick Cal covers the temperature range from 30°C to 350°C.

Both have interchangeable inserts, so you don’t have to buy another calibrator each time you find a new diameter sensor to calibrate. The Low Temperature Quick Cal is particularly exciting since it can work from a small 12 volt battery, making it truly portable, alternatively a mains supply is available with 100V - 240V, 50/60Hz input.

The Low Temperature Quick Cal comes complete with two inserts, one blank and one drilled 6.8mm diameter 120mm deep. Alternatively we can provide pre-drilled inserts to suit your needs. Each calibration well is 13mm diameter and 120mm deep.

The High Temperature Quick Cal has a single larger well and interchangeable inserts, 25mm in diameter by 120mm deep. Blank and other special drillings are available to order. The High Temperature Quick Cal is supplied 100-130 or 200-250V AC, 50/60Hz.

View Product


Fast-Cal - the product range you designed !

During early 2004 20 experienced engineers from many parts of the world were asked to produce their ideal specification for industrial calibration. Their top ten requirements, in order of priority, are: Rugged, Lightweight, Easy to use on site, Low cost/high benefit ratio, Fast response, high stability, Time saving features, Multiple sensor testing, Software, Modern design, Compliant with the latest regulations.

One model is ideal for the validation of Washer Disinfectors, Steam Sterilisers and Autoclaves. In place of a removable insert it has a fixed block with pockets for a reference probe and the type of test sensor commonly used in validation applications.

See the setup video here

View Product

Reference temperature probes (PRT's)

Industrial platinum resistance thermometers (PRT's) are ideal for field and lab use. Suitable for use as working standards in Dry Blocks and Liquid Baths or as high accuracy probes for our range of True Temperature Indicators.

All the thermometers are metal sheathed and both less fragile, and more affordable than the Isotech range of true Standard Platinum Resistance Thermometers that are used in laboratories and our found in our publication “Solutions for Primary and Secondary Laboratories”.

All the thermometers use handmade coil wound platinum sensing elements to give high accuracy and low drift. Isotech’s UKAS accredited lab can calibrate to the smallest of uncertainties.

Calibration should be specified to suit the particular operating range and application. Isotech can advise on which service is appropriate to match the temperature range and application.

View Product

milliK Precision Thermometer

The milliK Precision Thermometer from Isotech sets a new standard for the high accuracy measurement and calibration of Platinum Resistance Thermometers, Thermistors, Thermocouple and Process Instrumentation (4-20mA) over the range -270°C to 1820°C.

The milliK has two input channels for sensors and a third channel for current. It can be expanded to become a measuring system with up to 33 channels reading SPRTs, RTDs, Thermistors, or Thermocouples with the option to control calibration baths and log readings accurately.

In addition to low uncertainty measurements from Reference Standards and Industrial sensor measurement the milliK can control Isotech temperature sources, sequencing through a programmable list of temperature set points and log data to internal memory or a USB drive.

Wide Range of Sensors
SPRTs, PRTs, Thermistors, Thermocouple and 4 - 20mA
High Accuracy
< ±5ppm for PRTs, ±2μV for Thermocouples and ±1μA Transmitters
Logs – Controls Isotech Temperature Sources
Massive logging capacity – controls Dry Blocks and Liquid Baths
Benefiting You
The milliK sets a new standard for value, versatility and accuracy - < ±5ppm over range for PRTs, ±2μV for Thermocouples and ±1μA for current transmitters, see Data Sheet.

The milliK can display in °C, °F, K, Ohms, mV and mA with numeric and graphical display modes. 

The display resolution is 0.0001°C (0.1mK) made possible by using a powerful Sigma Delta Analogue to Digital converter to achieve a true measuring resolution of just 28μΩ equivalent to 0.00007°C (0.07mK) for PRT inputs.

View Product