Digital Differential Manometer is suitable for adjusting appliance regulators, setting delivery pressures and leakage. The pressure range is +/- 300 m Bar. It has smoothing function. The operating temperature is 0°c to 50°c. It measures positive, negative, or differential pressures from -60 to +60 in. wc. It features selectable engineering units, min/max function, and backlight for poorly lit conditions. Hold key freezes current pressure measurement on display, while zero button nulls out any minor pressure differences. This device is suited for verifying filter condition, monitoring clean rooms, troubleshooting HVAC systems, and performing field calibrations.This economical manometer is ideal for verifying filter condition, monitor clean rooms, troubleshoot HVAC systems or perform field calibrations.