Constructed with HA C276/316 Stainless Steel wetted material for ranges up to 1,500 psi or 15-5 PH Stainless Steel wetted material for ranges 1,500 psi and above and totally portable, the AC Series pressure calibrator can handle many rugged applications and harsh environments. The circuitry is designed to withstand dropping and is immune to electromagnetic interference. The calibrator is fully battery powered (9 V) so it is easily transportable from site to site. This versatile Model AC pressure calibrator is available with the accuracy of 0.05 % accuracy. The calibrator have a 4½-digit display for accurate and easy readings. The high/low feature captures and holds both the highest and lowest pressure reading. (Press clear or off to reset). Operating temperatures are from -18 °C to 82 °C [0 °F to 180 °F]. The set includes the digital gauge, carrying case, NIST certificate, and pressure adapter.