9331 Standard AC/DC Air Resistor

• ISO 17025 calibrations available
• High stability: better than 2.5 ppm/year
• 10 μΩ to 100 MΩ
• Operating range 18 °C to 28 °C
• Custom values available
• Low-temperature coefficient
• No air or oil bath required
• Typical AC/DC error: < 1 ppm up to 1 kHz for resistor values up to 10 kΩ

Low-temperature coefficient

• Lower uncertainties

Custom values available

• Gives you the solution you need for your application

Metal film technology

• Stable Performance

Industry-leading warranty

• 3 years

The Measurements International 9331 series of Precision Standard Air Resistors provide high accuracy and stability, for precision, on-site, resistance calibrations for values from 10 μΩ to 100 MΩ. The small, light and rugged resistance standards are ideal for use as working standards and are often used as artifacts in inter-laboratory comparisons.

Stability and temperature coefficients of the 9331 make this resistor ideal for easy transport and operation in any working environment within the range of 18 °C to 28 °C. The resistance standards require no temperature-controlled oil or air baths to achieve their specifications. However, for optimal performance as a primary set of resistors, it is recommended that the resistors be placed in Measurements International's model 9300A Air Bath.

Connections to Model 9331 are made using Tellurium copper binding posts for values up to 100 MΩ. A separate ground terminal is included for screening and the case is hermetically sealed to keep moisture out.

An interconnecting cable may also be ordered with the 9331 Resistance Standards. The interconnecting wire comes in either 2- or 4-conductor configurations. The wire may be ordered in lengths with screens already attached or in 100-metre rolls. No. 18-gauge solid copper, silver-plated, screened Teflon cable is recommended. 4-conductor cable is recommended to 1 MΩ and two-conductor cable for values above 1 MΩ.

Special values are also available at customer request.