The HH-20A series microprocessor-based handheld thermometers cover a wide temperature range and use *** technology. The readings are easy to read, and all models come standard with a custom 5-digit LCD that includes a trend display and self-diagnosis function. The casing is drip-proof, splash-proof, and dust-proof, and it has a built-in tilt stand/handle, making it suitable for tabletop use or hands-free field measurements. 

The HH-21A is a single-input device that accepts J, K, and T-type thermocouples. On the front panel, users can select the type of thermocouple, display unit (°C or °F), and display resolution (0.1° or 1°). The HH-21A also has a display hold function. Like all HH-20A series devices, the HH-21A is highly accurate, with a precision of 0.1% plus 1° F of the reading. 

The HH-22A and HH-23A accept dual inputs. The HH-22A accepts J or K-type thermocouples, while the HH-23A can use J, K, or T-type. Both models can display T1 (input 1), T2 (input 2), and T1-T2 (temperature difference), or scan between T1, T2, and T1-T2. 

Standard features for the HH-22A and HH-23A include display hold, minimum and maximum value storage, and trend indication. The min and max functions can record the minimum and maximum values of T1, T2, and T1-T2. The trend indicator shows whether the displayed data is rising, falling, or staying stable. When you turn the HH-20A on, it remembers what you did last. Thermocouple type, resolution, and temperature units are stored in non-volatile memory, so you don’t have to reprogram them every time you start it up.

HH-20A Series Ultra-High Precision Digital Thermometer Features

American Omega ultra-high precision digital thermometer with single and dual input models

Each device comes with a NIST traceable certificate (no data points)

Single and dual input models feature display hold function

Dual input model includes trend, min/max, and temperature difference measurement functions

HH-21A and HH-23A accept J, K, and T type thermocouple inputs

HH-22A accepts J and K type inputs

Resolution of 0.1 across full °F and °C ranges

Accuracy up to 0.1% of reading

Self-diagnosis and user-programmable hold

RoHS compliant

Optional power supply