- Resistance from 100 Ω to 100 GΩ
- High-accuracy: up to .01%, 3 Accuracy Classes Available
- Voltage up to 2000 V
- Excellent TC: as low as 5 ppm/°C
- Low voltage coefficient: as low as 0.2 ppm/V
- High-performance solid silver-alloy switches
- Rack mounting available
The High Resistance Resistance Substituter (HRRS Series) is an economical, high-performance, high-resistance decade box for all laboratory, test, and calibration needs. The High-resistance design is implemented with special resistors, switches, binding posts, and construction-design to allow high resistance performance without sacrificing other electrical properties. These instruments are useful wherever small currents and high resistances are required.
The HRRS Series employs state-of-the-art precision resistors of various types for high accuracy, high stability, and low temperature and voltage coefficients. The standard models offer a choice of one to seven decades.
See the HRRS-5kV & 10kV Series that feature higher voltage >10 kV and higher resistance up to 10 TΩ.
The binding posts, for the HRRS high resistance decade boxes, are insulated with PCTFE (polychlorotrifluoroethylene) a high-resistance, non-moisture-absorbing material to ensure low leakage current.
With a resolution as low as 10 Ω and a maximum available resistance of over 100 GΩ, the HRRS Series may be used for exacting precision high-value resistance applications.
The HRRS series decade box complements the HARS series which provides resistance steps as low as 1 mΩ. The units may be rack-mounted to serve as components in measurement and control systems.
HRRS High Resistance Decade Box Applications
- Calibration of meggers and megohmmeters,
- Checking of electrochemical and biomedical sensors and instruments.
- Testing high-impedance amplifiers and the insulation of low-power circuits.
HRRS Basic Specifications
Resistance per step
Total decade resistance
Max voltage per step (V)
Maximum Voltage (V)
Temperature coefficient (ppm/C)
Voltage coefficient (ppm/V)
|10 Ω||100 Ω||±(0.01%+2 mΩ)||±(0.03%+2 mΩ)||±(0.10%+2 mΩ)||2.5||25||15||0||10||Wirewound, non-inductive|
|100 Ω||1 kΩ||±(0.01%+2 mΩ)||±(0.03%+2 mΩ)||±(0.10%+2 mΩ)||8||80||5||0||10||Wirewound, non-inductive|
|1 kΩ||10 kΩ||±0.01%||±0.03%||±0.10%||23||230||5||0||10||Wirewound, non-inductive|
|10 kΩ||100 kΩ||±0.01%||±0.03%||±0.10%||70||700||5||0||10||Wirewound, non-inductive|
|100 kΩ||1 MΩ||±0.01%||±0.03%||±0.10%||230||2000||5||0||10||Wirewound, non-inductive|
|1 MΩ||10 MΩ||±0.01%||±0.03%||±0.10%||1000*||2000||15||0.2||25||Metal-oxide film|
|10 MΩ||100 MΩ||±0.03%||±0.10%||±1%||1000*||2000||15||<1||50||Metal-oxide film|
|100 MΩ||1 GΩ||±0.10%||±0.20%||±1%||1000*||2000||15||1||100||Metal-oxide film|
|1 GΩ||10 GΩ||±0.20%||±0.50%||±1%||1000*||2000||50||1||500||High-voltage film|
|10 GΩ||100 GΩ||±0.50%||±1%||±1%||1000*||2000||50||1||500||High-voltage film|
|100 GΩ||1 TΩ||See HRRS-5kV Series for this model.|
|1 TΩ||10 TΩ||See HRRS-5kV Series for this model.|