The HH-20A series has been discontinued. Please see the HH911T-HH912T as a possible alternative or contact our Temperature Engineering department.
The HH-20A 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-21A 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-21A also has
a display hold function. As with all HH-20A series units, the HH-21A
features exceptionally high accuracy, 0.1% of reading plus 1°F.
The HH-22A and HH-23A accept dual inputs. The HH-22A accepts
either J or K thermocouples, while the HH-23A 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-22A and HH-23A 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.
When you turn on an HH-20A, it remembers what you were doing;
the thermocouple type, resolution, and temperature units are stored
in non-volatile memory so you don’t have to reprogram every time
you start up
SPECIFICATIONS Display: 5-digit LCD; custom indicators for thermocouple type°C/°F units, hold and low battery; HH-22A and HH-23A have additional indicators for input (T1, T2, T1-T2, scan), up/down trend arrows and min/max data storage Keypad: Momentary switches with tactile feedback; on/off, thermocouple type, units, resolution, hold; HH-22A and HH-23A have additional keys for record min/max, view min/max, stop/clear record input type (T1, T2, T1-T2, scan) Configuration Retention: Selected readout, input type, units and resolution retained on power-off Diagnostics: Low battery, open thermocouple, invalid keypad entry, out of range, internal hardware fault Accuracy: 0.1% rdg + 0.6°C (1°F) Repeatability: 0.2°C for 1 week at constant temperature Resolution: 0.1° throughout entire range Temperature Coefficient: (0.02% rdg + 0.1°C) below 64°F (18°C) and over 82°F (28°C); included in accuracy, between 18 and 28°C (64 and 82°F) Ambient Temperature: 0 to 50°C (32 to 122°F), 0 to 90% RH Reading Rate: 1 per second Max Common Mode Voltage: 42 V peak to earth ground Power: 9 Vdc battery, alkaline (included) Battery Life: 100 h, typical, alkaline battery Dimensions: 178 H x 74 W x 28 mm D (7.0 x 2.9 x 1.1") Weight: 284 g (10 oz) Accessories Included: 9 Vdc alkaline battery, beaded wire Type K probe (for each input), integral tilt stand/ handle, wrist strap, rubber holster, NIST certificate, and operator’s manual
† All amounts shown in USD Note: Comes with beaded wire Type K probe (for each input), integral tilt stand/handle, wrist strap, 9V battery, shock resistant holster (HH20-HB) and operator’s manual.