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Exceptional Accuracy Digital Thermometers  - Discontinued

HH21, HH22 & HH23

Exceptional Accuracy Digital Thermometers | HH21, HH22 & HH23

Exceptional Accuracy Digital Thermometers

See All Models Below

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3 year warranty CE
  • Each Unit Comes With a Certificate Stating NIST Traceability and ANSI/Z540-1- 1994 Compliance
  • Single and Dual Input Models with Display Hold
  • Dual Input Models Feature Trend, Min/Max and Differential Measurements
  • HH-21 and HH-23 Accept J, K and T Inputs
  • HH-22 Accepts J and K Inputs
  • 0.1 Resolution in °F and °C Over Full Range
  • High 0.1% Reading Accuracy
  • Self-Diagnostics and Retention of User Programming


The HH21/22/23 series have been discontinued due to the obsolescence of a key component. Please see the HH911T/HH912T as a suggested alternative or contact our Temperature Engineering department.

The HH-20 series microprocessor-based handheld thermometers offer wide-ranging temperature readings and feature state-of-the-art innovations. The easy-to-read custom 5- digit LCD readout with trend display and self-diagnostics are all standard. The case is drop/splash and dust-proof, and has a built-in tilt stand/handle for bench use or hands-free field measurements. The HH-21 is a single input unit that accepts J, K and T thermocouple types. From the front panel, the user can select the thermocouple type, display units (°C or °F), and display resolution (0.1° or 1°). The HH-21 also has a display hold function. As with all HH-20 series units, the HH-21 features exceptionally high accuracy, 0.1% of reading plus 1°F. The HH-22 and HH-23 accept dual inputs. The HH-22 accepts either J or K thermocouples, while the HH-23 works with J, K or T types. Both models can display T1 (input 1), T2 (input 2), T1-T2 (difference), or scan between T1, T2 and T1-T2. Standard features for both the HH-22 and HH-23 include display hold, Min and Max storage, and trend indication. The Min and Max functions record minimum and maximum values for T1, T2 and T1-T2. Trend indication shows if the displayed input is increasing, decreasing or stable.

View PDF file in "Related Links" (below) for complete product specifications
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Part Number/ Desc.
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See HH-21A. See Related Link Below
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J/K Thermometer Dual Input
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J/K/T Thermometer Dual Input
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Soft carrying case
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2 In Stock
9 V NiCad battery with 110 Vac charger for HH22 or HH23
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More Than 25 In Stock
Extra alkaline battery
All amounts shown in USD
Note: Each unit supplied complete with beaded wire type K thermocouple (for each input), integral tilt stand/handle, wrist strap, 9 V battery, shock resistant holster (HH20-R) and user’s manual.