Description
Product Overview
The RALBIL Digital Vacuum Gauge is a professional‑grade instrument designed for accurate vacuum and pressure measurement in demanding environments. Housed in a rugged ABS plastic case measuring 9.44 x 6.3 x 2.36 inches and weighing only 1.43 pounds, the gauge combines portability with durability. It operates on four AAA batteries (included) and features a 1/4″ SAE standard interface, making it compatible with most vacuum pumps and HVAC systems. Key technologies include temperature compensation, automatic calibration, a high‑definition backlit LCD, and a multi‑unit conversion system covering Pa, kPa, mbar, Torr, and inHg.
Usage
Designed for HVAC technicians, laboratory researchers, and industrial maintenance crews, this gauge excels in vacuum evacuation, pressure leak testing, and system diagnostics. Whether you are evacuating air conditioning lines, testing refrigeration seals, or calibrating laboratory vacuum chambers, the device provides reliable readings in real‑time. Its foldable hook reduces hand fatigue during prolonged operations, and the anti‑slip silicone grip ensures secure handling in wet or oily conditions. 
Why Choose Us
RALBIL commits to quality through FCC, RoHS, and CE certifications, guaranteeing electromagnetic compatibility and environmental safety. The gauge includes an auto‑shutdown function to conserve battery life and a three‑year warranty backed by 24/7 customer support. Our rigorous factory testing ensures each unit meets the specified ultimate vacuum level of 3×10⁻⁶ Torr, delivering consistent performance across temperature ranges.
Key Features
- High‑precision measurement down to 3×10⁻⁶ Torr for critical vacuum applications.
- Temperature compensation and auto‑calibration maintain accuracy across -10 °C to 50 °C.
- Backlit HD LCD with multi‑unit conversion and flash alerts for target pressure thresholds.
- Audible buzzer alarm activates when pressure exceeds preset maximum, enhancing safety.
- Foldable hook, anti‑slip silicone grip, and 1/4″ SAE interface for ergonomic, hands‑free operation.
FAQ
What batteries does the gauge use and how long do they last?
The gauge runs on four AAA batteries, which are included. Under typical use, the batteries last up to 200 hours before the auto‑shutdown feature conserves power.
Can the gauge be used for both vacuum and positive pressure measurements?
Yes, the device supports a wide range from deep vacuum (3×10⁻⁶ Torr) to positive pressure up to 30 kPa, selectable via the unit conversion menu.
Is the gauge suitable for outdoor or harsh environments?
Its ABS housing and IP54‑rated silicone grip protect against dust and splashes, making it suitable for field service and industrial workshops.
How does the auto‑calibration function work?
When powered on, the gauge references atmospheric pressure to automatically adjust its sensor, ensuring accurate readings without manual intervention.
What warranty and support are provided?
RALBIL offers a three‑year limited warranty and 24/7 customer service to address any technical questions or replacement needs.




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