Duro United 4156-6621-CERT

<p><strong>Duro United, 4156-6621-CERT, Series 15 0-300 psi, 4-1/2" Ammonia Gauge with Case #6, 1/4 Back, Bronze </strong> </p> <p>This series is designed for use by refrigeration engineers requiring high quality gauges for use with refrigerants that are non-corrosive to bronze </p> <p><strong>Features: </strong> </p> <ul><li>Movement: Sturdy corrosive resistant bronze bushed rotary type movement with bronze links and stainless steel link screws. </li> <li>Pointer: Lightweight balanced construction with adjustment feature. </li> <li>Dial: Heavy gauge aluminum. Temperature for saturated ammonia in red. 4-1/2" </li> <li>Window: Glass </li> <li>Connection: Brass machined connection with wrench flats, 1/4" NPT male connection at back of case. </li> <li>Accuracy: ASME/ANSI B40.1 Grade 1A (1%) </li> </ul>