DIGITAL VACUUM GAUGE with eight units of vacuum for confidence PR116 This easy-to-use gauge helps you to be certain that air and moisture have been removed from the system. Simple push of a button changes the display readout between 8 units of vacuum. Each displays down to the equivalent of 10 microns of vacuum to let you know that your vacuum pump is clean and performing properly. If the sensor gets dirty, simply pull a new sensor out of your tool kit, plug it into the gauge, run through a quick calibration process, and be back on the job within minutes. Unique patented thermal conductivity sensor automatically compensates for temperature Replaceable, cleanable, plug-in sensor handles 450 psi positive pressure Displays 8 different units of vacuum (microns, Torr, Bar, Psi, kPa, Kg/cm2, mmHg, inHg) 12" coiled sensor cord stretches to 24" for easy reach, connectivity, and readability of display Operating Temperature Range: 32°F to 122°F (0℃to 50℃) Low battery indicator Automatic shut-off after 15 minutes Weight: 12 oz. (340 g) with battery PR116 VACUUM GAUGE SET Full range-atmosphere to 1 micron PR116 LCD vacuum gauges combine thermocouple sensor technology with advanced electronics for precise readings and repeatability not found with thermistor sensors or analog meters. The result- accurate readings from atmosphere to 1 micron without recalibration on job after job. Thermocouple sensor features: * No adjustments or warm-up. Stays calibrated after on/off switching and long evacuations * Automatic ambient temperature compensation * Automatic battery compensation Thermocouple technology has long been proven in laboratory and precision industrial instrumentation for sensing the deep vacuum range. Thermocouple sensors are factory calibrated and exhibit few of the electronic variances of thermistor sensors in many other electronic gauges. LCD gauge features: * Normal handling and jarring will not affect the LCD reading * Rugged molded case protects electronic circuitry and sensor * CE approved Precision circuitry controls sensor and translates sensor input into micron readings on the easy-to-read LCD Specification: 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℃; no influence on accuracyUnits: inHg/Torr/psia/mbar/mTorr/Pa/micron/kPa Power Supply: 3AA batteries Battery Life: 300 Hours Max Overpressure:27.5 bar Operating Temperature: 0°F ~140°F (-17.8℃~60℃) Fitting: 1/4” male flare Product Size: 127x74x37mmMeasuring Range: 0-19000 microns Resolution: 0-400 microns         1 microns 400-3000 microns      10 microns 3000-10000 microns    100 microns 10000-19000 microns   250 microns Accuracy: 10%