1. Applied Ambient: clean,dry and non-eroded air 2. Measurement Range: 0~15PSI 3. Ambient Temperature: -20~80℃ 4. Ambient moisture: 5%~95% 5. Accuracy: 1‰ ,0.01kPa least resolution 6. Permanent stability: 1% 7. Display Means: 4 digits LCD with hold radix point,changes between inHg, and Micro units Display window dimension :47*22 cm 8. Gauge Dimension: 80MM 9. Power Supply: 9V lithium battery,1000-1200mAh 10. Battery life: 18 months 11. Battery Automatic Diadnosing Function: Display flickering when battery under 6V and warning to change battery 12. Automatic powering off function: After automatic powering off the internal digits maintaining 13. Temperature compensation function:Temperature influence repaired by software:automatic compensation within 0~50℃;