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4-Wire Pt100 Thermometer


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The 4-Wire Pt100 Thermometer - HI955501 is housed in a compact, ergonomic casing with a wrist-strap to make it easy for carrying in a laboratory or plant. The HI955501 offers a range of probes for measurement in gases, air, liquid, and semisolids. Optional Pt100 probes cover a wide temperature range from -30 to 350oC.

  • Auto-ranging
  • Missing Probe Indicator
  • Interchangeable Pt100 Probes


The 4-Wire Pt100 Thermometer - HI955501 is a rugged and highly accurate meter that can be used indoors or outdoors with a variety of interchangeable Pt100 probes. The HI955501 automatically adjusts the resolution of a reading based on the temperature range and also features a missing probe indicator.

Features at-a-glance

Auto-ranging - The HI955501 automatically adjusts the resolution of a reading based on the temperature range. From -199.9 to 199.9oC the resolution is 0.1oC. For readings outside of this range, from -200 to 850oC, the resolution is 1oC.

Interchangeable Pt100 Probes - Several Pt100 type probes are available to meet the specific needs of users. Hanna Instruments offers the HI768 series that includes probes to measure the temperatures of gases, air, liquid, and semisolid samples.

Missing Probe Indicator -  The HI955501 features a missing probe indicator to alert the user if no temperature probe is detected.  

Low Battery Indicator - When the battery level is below 10%, a “V” warning symbol is displayed to indicate low battery condition


Temperature Range -199.9 to 199.9°C; -200 to 850°C
Temperature Resolution 0.1°C (-199.9 to 199.9°C); 1°C (-200 to 850°C)
Temperature Accuracy (@25ºC/77ºF) ±0.2°C and ±1 digit (-120.0 to 199.9°C); ±1°C and ±1 digit (-170 to 450°C); ±1% FS and ±1 digit (outside) (excluding probe error)
Battery Type/Life 9V / approximately 150 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 143 x 80 x 38 mm (5.6 x 3.2 x 1.5’’)
Weight 320 g (11.3 oz)
Ordering Information HI955501 is supplied with battery and instructions.
Warranty 2 years