9331R Precision Standard AC/DC Reference Resistors

  • 9331R AC/DC Reference Resistors
  • High Stability
  • 0.1 Ω to 100 MΩ
  • Operating Range 18 °C to 28 °C
  • Custom Values Available
  • Metal Foil Technology
  • Ultra-Low Temperature Coefficient
  • Typical AC/DC Error < 1 ppm Up to 1 kHz
Features & Benefits
Feature Benefit
Unmatched stability. Provides confidence in uncertainty calculation.
Low-temperature coefficient. Lower uncertainties.
Custom values available. Gives you the solution you need for your application.
Metal film technology. Excellent AC/DC agreement.
Industry-leading warranty. 3 years.

Experience the pinnacle of precision and stability with the Model 9331R Reference Series of Precision Standard Air Resistors from Measurements International. Drawing on decades of expertise in the field, we have created a groundbreaking solution that bridges the gap between high accuracy and high stability.

The Model 9331R series of air resistors offers a superior alternative to traditional oil resistors, delivering superior measurement results without the need for temperature-controlled oil or air baths. Employing multiple oil-filled resistive and coil elements housed in a sealed enclosure, the Model 9331R is the perfect choice for demanding applications.

For optimal performance, we recommend using the Model 9331R in conjunction with our Model 9300A Air Bath. Connections to the Model 9331R are made with ease thanks to the silver-plated tellurium copper binding posts and separate ground for case grounding. Additionally, an interconnecting cable may be ordered in either two- or four-conductor configurations, with the option of already-attached screens or 100-metre rolls of No. 18 gauge solid copper, silver-plated, screened Teflon cable.

Upgrade your measurement systems with the Model 9331R Reference Series of Precision Standard Air Resistors and experience the benefits of high accuracy and high stability.”

Each 9331R comes with a calibration report including the assigned value and temperature coefficient data.

Specifications
Model Nominal
Value
(Ohms)		 Tolerance
± ppm*		 First Year
Drift
(ppm)		 Stability
12 Month
(ppm)		 Max
Current
(A)		 TC at 23 °C
± 1 °C
(ppm/°C)		 Maximum
Voltage
(V)
9331R/0.1 0.1 10 2.5 1 1 0.1 0.1
9331R/1 1 10 2.5 1 0.316 0.1 0.32
9331R/10 10 2 2.5 1 0.1 0.1 1.0
9331R/25 25 2 2.5 1 0.063 0.1 1.58
9331R/100 100 2 2.5 1 0.031 0.1 3.16
9331R/1 k 1 k 2 2.5 1 0.01 0.1 10.00
9331R/10 k 10 k 2 2.5 1 0.003 0.1 31.62
9331R/100 k 100 k 2 2.5 1 0.001 0.1 100.0
9331R/1 M 1 M 2 2.5 1 0.0003 0.2 300.0
9331R/10 M 10 M 5 10 10 0.0001 5 1000.0
9331R/100 M 100 M 10 20 10 0.00001 5 1000.0

* Tolerance – Defined as the potential variance from the nominal resistance value at the time of manufacture. Due to the natural ageing process, it is recommended that the resistance value be monitored closely for the first year of ownership.

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