Yellow Jacket 49138 3-1/8" Blue Compound Gauge 30" 0-500 psi for R22, R404A, and R410A

With 1% accuracy (Class 1) calibration. Large 3-1/8″ gauges are housed in a red or blue steel case with front recalibrator screw. High visibility colored temperature scales are easy to read through the full view polycarbonate crystal.

• Flutterless™ technology with brass surge protector to minimize needle pulsation
• Brass gauge movement
• Copper alloy Bourdon tube
• 1/8″ NPT Male connection
• Calibrated to 1% accuracy
• Color-coded red for pressure and blue for compound
• Color-coded refrigerant types

*These gauges have °C and °F on dial

**Features retard protection to 350 psi

***Features retard protection to 500 psi