Digital Pressure Vacuum Gauge WK-688H High Pressure. Note:we have WK-688L model low pressure, if you need, welcome to visit our store. 1Pressure and vacuum gauge shift function. 2Build-in 82 refrigerants according to U. NIST standard refrigerants pressure anAd temperature relationship database. 3 Real-time vacuum pressure test and percent indicate. 4 Low pressure indicate. Batteries life is 30Hour, 9V. 5 Pressure units: Psi, Bar, Torr, Kg F/cm2, KPa, InHg, MmHg. 6Temperature units: °F, °C. 7 Test range: UAC: -101 Kpa-6Mpa. For WK688L and WK688H. 9 Accuracy: ±0.5%. 10 Overload: 100Bar, 10Mpa. 11Operating temp: -20°C- 60°C. 1 X Digital Pressure Vacuum Gauge (WK-688H High Pressure).