Super Stars Digital Micron Vacuum Gauge, 1/4 inch SAE, HVAC Pressure Tester with Alarm, Temp Compensation, LCD Backlit Display, 4 Units, Carrying Case Included

• High Accuracy Vacuum Measurement: Equipped with a professional Pirani vacuum sensor, the ST-VG90 offers fast and accurate readings with a wide range from 99999 to 0.1 Pa (740000 to 0.75 micron), ensuring your HVAC system is moisture-free before refrigerant charging
• 4 Pressure Units Available: Easily switch between Pa, mBar, mmHg, and Micron to meet international and industry-specific standards. Designed for both technicians and advanced users who need flexibility in the field
• Smart Vacuum Alarm Function: Built-in buzzer and visual alert activate once the preset vacuum level is reached, helping prevent over-evacuation or wasted time during system evacuation
• Backlit LCD & Power-saving Design: Clear digital LCD screen with optional backlight ensures readability even in low-light environments. Automatic power-off function preserves battery life
• Durable and Pump Compatibility: Compact pocket sized design with one key calibration and quick unit switching works with vacuum pumps of 5 CFM or higher for stable and accurate performance