21812 - 1.5-inch Acetylene Cylinder Gauge 400 PSI Back Mount

Reliable Replacement Pressure Gauge for Gas Regulators

Maintain the safety and accuracy of your gas regulation equipment with the ESAB 21812 Replacement Pressure Gauge. Designed specifically for industrial environments, this gauge features a pressure range of 0 to 400 PSI. This range is the industry standard for monitoring the cylinder contents of Acetylene tanks, as a full Acetylene cylinder typically holds approximately 250 PSI at 70°F. By providing a scale up to 400 PSI, this gauge gives operators a clear view of the tank's status with ample headroom, ensuring you never over-pressurize the reading mechanism.

The gauge is constructed with a robust ABS (Acrylonitrile Butadiene Styrene) plastic case. ABS is chosen for its excellent balance of strength and weight; it is resistant to impact, which is crucial in busy workshops where tools and equipment are frequently moved. Furthermore, the plastic housing is naturally resistant to corrosion, making it a long-lasting choice even in humid or chemically active environments. The "Red" designation in the product specification typically aligns with industry color-coding standards for fuel gases, providing an immediate visual cue to technicians that this gauge is intended for the fuel side of the oxy-fuel setup, preventing dangerous cross-connections.

Installation is straightforward thanks to the Lower Back Mount (LBM) design. This configuration allows the gauge to screw directly into the back of the regulator body, keeping the profile compact and the face oriented towards the operator. Whether you are repairing a vintage Victor regulator or maintaining a fleet of ESAB equipment, this 1.50-inch gauge is a critical component for safe welding operations. At Josef Gas, we recommend keeping spare gauges on hand to minimize downtime caused by accidental impact damage or wear over time.