Model I.A. Analog Potential Meter by M.C. Miller

The Model IA voltmeter (Analog Potential Meter) is designed for ease of use by meter readers and corrosion technicians alike and the voltmeter includes an integrated RE-5 reference electrode attached for "metallic structure-to-soil" potential difference readings.  The kit also includes a test lead for electrical connection to a metallic structure.

The voltmeter offers a 0 - 2 VDC range with a 10 MΩ input impedance and the analog display presents a color divided scale for convenient indication as to whether or not a carbon-steel structure is receiving a suitable level of cathodic protection, with respect to the accepted 0.85 V (850 mV) threshold value.

Note: Only positive voltage values are displayed

• RE-5 reference electrode
• 8 ft black test lead with 46-C clip

An optionally available electrode extension can be used to eliminate having to bend over to have the reference electrode placed in contact with soil. 

• 2½" taut-band rugged instrument
• Weatherproofed neoprene gasket
• 10 MΩ input resistance
• Solid-state impedance amplifier
• Operates on one small 9V transistor battery, low drain - long shelf life push switch to check battery condition, battery easily replaced and readily available.
• Push switch to read potentials, current drain only while taking readings.
• Scale marked 0VDC to 2VDC, color band: Red to 0.85VDC, Green to 2VDC.
• Filter eliminates errors caused by AC, Up to 50 volts 50/60 Hz
• Operating temperature: 0°F to 150°F (-18°C to 66°C)
• Molded PVC housing
• Plastic carrying case with resilient padding
• Modular construction
• Weight: 3.0 pounds (1.36 kg)
• Size: 2.5 inches (6.35 cm) deep x 10.0 (25.4 cm) inches long (including the reference electrode).