Isotech TTI-22 High Accuracy Thermometer

Isotech TTI-22 High Accuracy Thermometer

0 out of 5

Temperature Range: -250°C to 960°C
5 to 10 times the performance of comparably priced instruments!

  • Accuracy: ±0.001°C (1mK)
  • Resolution: 0.0001°C (0.00004Ω)
  • contains both RS232 and Ethernet ports
  • 10 Hours Use from 2 AA batteries
Category: Temperature


PDF Product Brochure          

Quite simply, the Isotech TTI-22 High Accuracy Thermometer sets new standards in the price-to-performance ratio for industrial and secondary resistance thermometry. If you need high accuracy from a reference standard at an affordable price, you have to look at the TTI-22.

The TTI-22 has an accuracy of 0.001°C and a resolution of 0.0001°C (0.00004 Ohms). This high accuracy thermometer has two input channels, is lightweight (1.8kg), and will operate for more than 10 hours from two small AA cells. It has both RS232 and Ethernet ports.

Simple to use, supporting both Industrial 100 Ohm probes and SPRTs to ITS-90, 25.5 and 100 Ohm. Up to 30 probe calibrations can be stored, along with the calibration expiry date, so the instrument can warn when the calibration time has been exceeded.

Built-in statistics calculation can show you both the measured and average values, along with the standard deviation over previous measurements.

The Isotech TTI-22 is ideal as a reference standard alongside liquid calibration baths, for the smallest uncertainty calibration with Dry Blocks, or for demanding stand-alone measurement applications.

Previously, this level of performance was confined to specialist laboratories with expensive thermometry bridges; TTI-22 delivers 5 to 10 times the performance of comparably priced instruments.


Model TTI-22
Inputs 2 channel
Pt100 (BS EN 60751 / IEC 751) or 25.5/ 100Ω SPRT to ITS-90
Measuring Current 041mA
Self Heating Test Current 0.29mA (0.41mA / √2)
Measuring Time 1.44 seconds for both channels
Measuring Range -250 to 960°C (0 to 440 Ohm)
Resolution Temperature: 0.0001°C, 0.1mK
Resistance: 0.00004Ω, 40 μΩ
Uncertainty of Measurement Temperature : 0.001°C, 1mK 100 Ohm PRT
Resistance: 0.4mΩ @ 20°C
instrument only, uncertainty with sensor dependent on range and sensor type.
Reference Resistor Internal 380Ω
TCR ±0.3ppm / °C
Stability ±5ppm / year
Interface Rs232, Ethernet, built-in web server provides simle temperature display
Ambient Temp. Range 10°C to 30°C
Power Supply 7.5VDC, 250mA power adapter or 2 x AA batteries (typically >10 hours operating time)
Case Dimensions Width: 190mm
Height: 112mm
Depth: 240mm
Weight 4lb (1.8kg)