Yellow Jacket 49138 3-1/8" Dry Manifold Gauge, Blue, 30" -0-350 psi, R-22/404A/410A

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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

When a gauge has RETARD zone, full scale is considered to be the last marked reading prior to entering the RETARD zone. For example, this gauge has a full scale reading of 120 psi. Gauge accuracy is not specified in the RETARD zone. 

***Features retard protection to 500 psi