The gas tester can measure the air pressure of a single pipe or the differential pressure of two pipes. It is suitable for measuring ventilation and air condition systems， gas measurement, calibration, and troubleshooting of any gas pressure systems.

Feature:
1. Multifunctional, it can record max/min/average value, hold data and display DIF value of two measured objects.
2. Energy saving, automatic shutdown in 25 minutes if no operation is taken.
3. Low battery reminder function, it displays a battery charging icon on the screen when the battery is low.
4. Professionally designed, it has a wide range, high resolution, and high measurement accuracy, and it can portable and easy to use.
5. Large LCD backlight display, easy reading at a glance in a dark environment.
6. Wide application, 11 optional units for gas pressure, with an accuracy of ±0.3%FS.

Specification:
Accuracy:±0.3%FS
Linearity/hysteresis:± 0.1% FS of full scale
Limit maximum pressure:30Psi
Repeatability:±0.25%FS
Automatic shutdown:About 25 minutes
Pressure connection:One 1/8 "(3.18 mm) quick connector
Operating temperature:0~40℃
Storage temperature range:-10~60℃
Over-range prompt:ERR1 or ERR2
Working power supply:Two AAA batteries
Weight:134g
Size:160*62*31mm

Package list:
1 X manometer with lanyard
2 X AAA batteries
4 X soft hoses
1 X protective bag
1 X small screwdriver
1 X packing box
1 X user manual
1 X metal terminal