Elitech PG-30Pro Blue Digital AC Pressure Gauge -14.5~500 PSI

Pressure range: Red gauge: -0.100 ~ 5.515MPa (-14.5-800psi) Blue gauge: -0.100-3.448MPa(-14.5-500psi) Resolution: 0.001MPa, 0.5psi Accuracy: ±0.5%FS Sampling period:1s Temperature unit:℃/F Backlight time: The backlight will be off after 3s, 4s, 5s, 10s, or 15sasset in case of no operation. LCD screen with blue backlight, 50 x 26 mm Measurement units: MPa, bar, psi, KPa, kg/cm 2, cmHg Auto-off: If this function enabled the gauge will be off automatically after 10 (or 20, 30, 40 )minutes per your settings. You may also disable this function by setting it as OFF, i. e the gauge will be on all the time. Parameter settings: Auto off, pressure/temperature unit, backlight time PT table lists the pressure and temperature of 87 types of common refrigerants Battery: 3 AAA batteries Battery life: Approx. 1 year Low battery indication at a low battery level Operating environment: Temperature:-10℃~60℃; Humidity 35% - 85%RH