The Super Stars ST-VG90 digital vacuum gauge is a professional vacuum meter designed for precise monitoring of the evacuation process in refrigeration and air conditioning systems. The device enables accurate vacuum measurement across a wide range from 99,999 Pa to 0.1 Pa, making it suitable for both basic service work and more demanding applications in the HVAC/R industry. The ST-VG90 model is equipped with a target vacuum alarm featuring a 90 dB audible signal that indicates when the set value has been reached. The “One-Key” calibration function allows for quick restoration of measurement accuracy, while the leak test facilitates assessment of the vacuuming process quality and monitoring of vacuum maintenance in the system. Its compact housing, battery power, and long operating time make the meter ideal for mobile field work. The ST-VG90 is a practical tool for service technicians and installers who expect accurate measurements, convenient operation, and reliability in their daily work. Key features:

• wide measurement range: 99,999 Pa – 0.1 Pa,
• high measurement accuracy in the range of 0.1–1,000 Pa,
• support for multiple units: Pa, mBar, mmHg, mTorr, inHg, microns,
• “One-Key” calibration,
• leak test function,
• automatic shut-off after 10 minutes of inactivity,
• battery level indicator,
• 7/16“-20 UNF (1/4” SAE) port, compatible with HVAC/R accessories