The gauge can conveniently measure the differential pressure. It
It has 11 selectable measuring units used for testing
ventilation and air conditioning, sample control, clean room or other
Troubleshooting gas pressure.

Technical specifications:
Model: HT-1890

Display: LCD backlight
InH2O range: ±55.40; Resolution: 0.01
PSI Range: ±2000; Resolution: 0.001
MBAR Range: ±137.8; Resolution: 0.1
Kpa Range: ±13.79; Resolution: 0.01
InHg Range: ±4.07; Resolution: 0.001
MmHg Range: ±103.4; Resolution: 0.1
Ozin2 range: ±32; Resolution: 0.01
FtH2O Range: ±4.612; Resolution: 0.001
CmH2O range: ±140.6; Resolution: 0.1
Range Kgcm2: ±0.140; Resolution: 0.001
Bar Range: ±0.137; Resolution: 0.001
Accuracy: ±0.3%FSO(25°C)
Repeatability: ±0.2% (max. +/-0.5%FSO).
Linearity/Hysteresis: ±0.29%FSO
Max. Pressure: 10 Psi
Response time: 0.5s typical
Low battery indicator: Yes
Out of range indicator: Err. 1 US
Underrange indicator: Err. 2 US
Operating conditions: 0~50°C / 32~122°F
Storage conditions: -10~60°C / 14~140°F
Power supply: 1 * 9V battery (NOT included)
Size: 16*5.5*3.2cm/6.3*2.2*1.3inch
Weight: about 268g/9.5oz

Packing List:
1 x Digital Pressure Gauge (Battery Not Included)
1 x black case.
4 x flexible hose.
1 x metal accessory.
1 x user manual (English)