Supported Applications
The Omega HHC280-Series comprises rugged handheld environmental test meters designed for field engineering. The series includes the HHC280 differential manometer and the HHC281 absolute pressure meter, alongside companion models covering temperature (HHC201/HHC210), RPM (HHC250), light intensity (HHC230), and air velocity/humidity/dew point/wet bulb measurements (HHC261). Documented applications for the HHC280 differential manometer include HVAC system troubleshooting, gas pressure measurements, and use with pitot tubes to measure air velocity.
Operating Conditions & Performance
The series operates within an ambient temperature range of 0 to 50°C (32 to 122°F). The HHC280 differential manometer measures a primary pressure range of 0 to 100 hPa / 0 to 1019.7 mmH2O, with selectable units including mmHg, psi, inH2O, inHg, mbar, and Pa. Accuracy for the HHC280 is specified as ±0.03 hPa (0 to 0.30 hPa); ±0.05 hPa (0.31 to 1.00 hPa); ±0.1 hPa + 1.5% of rdg (rest of range). In mmH2O units, accuracy is ±0.3 mmH2O (0 to 3.0 mmH2O); ±0.5 mmH2O (3.1 to 10.2 mmH2O); and ±1.02 mmH2O + 1.5% of rdg for the remainder of the range.
The HHC281 absolute pressure meter covers a range of 300 to 1200 hPa with an accuracy of ±3 hPa, supporting barometric and altitude measurements. Both models feature Hold/Min/Max/Max-Min/AVG functions, auto power-off after 10 minutes, and a backlight that automatically turns off after 15 seconds.
Configuration Options
The HHC280-Series offers configurable measurement units and specific process connections tailored to the model. The handheld form factor includes dimensions of 24.7 x 50.9 x 132.9 mm (0.98 x 2.0 x 5.2") across models, with weights ranging from 110 g (HHC250) to 148 g (HHC201/HHC210). Power is supplied by two "AAA" batteries included in the package.
• Process Connections: The HHC280 features dual pressure inputs P1 and P2 with hose barbs. It supports eight selectable units plus air velocity readouts (m/s, fmp).
• Housing & Protection: All models include a slip-off hard cover shell, rubber bumper, carrying strap, and protection cap.
• Battery Life: Typical battery life with alkaline batteries varies by model: HHC280 (85 hours), HHC281 (600 hours), HHC201 (250 hours), HHC210 (40 hours with laser), HHC250 (30 hours), HHC230 (180 hours), and HHC261 (50 hours).
• Approvals: The series carries CE certification.
Key Product Differences
The bundle distinguishes between discrete models within the broader handheld family. The HHC280 is a differential manometer with dual inputs, while the HHC281 is an absolute pressure meter configured for barometric and altitude readings (units include m and ft). Other series members serve distinct measurement functions: the HHC201 is a dual input Type K thermocouple thermometer; the HHC210 combines infrared temperature sensing with air temperature measurement; the HHC250 measures RPM/rps; the HHC230 quantifies light intensity in lux/fc; and the HHC261 functions as a hygro-anemometer for air velocity, humidity, and dew point.
Resolution varies by unit selection on the HHC280: 0.1 hPa/0.1 mmH2O (primary), with per-unit resolutions of 0.01 mmHg, 0.001 psi, 0.01 inH2O, 0.001 inHg, 0.01 mbar, and 1 Pa.
| Accuracy Class | > 0.25% |
| Additional Features 1 | 8 Selectable Units |
| Battery Size and Type | Alkaline AAA |
| Data Interface | N/A |
| Height | 132.9 mm |
| Length | 24.7 mm |
| Number of Batteries | 2 |
| Number of Digits | 5 |
| Operating Temperature, Max | 50 °C |
| Operating Temperature, Min | 0 °C |
| Pressure Resolution | 0.1 hpa |
| Series ID | HHC280-Series |
| Supply Power Note | 2 “AAA” batteries (included) |
| Width | 50.9 mm |