Primary Standards.gif (2715 bytes)

AIR RESISTORS - Model 5420

Standard Air Resistors

Features

Convenient air resistors don’t require oil or air baths

Calibrate resistance thermometers and other devices

Includes NIST-traceable calibration data with uncertainty to 1 ppm

Easily transported for on-site resistance calibration

Use our Feedback Form for more information, to request a catalog or for a Price Quote

Specifications



Model

Nominal
Value (W)

Tolerance
±ppm

Stability, ppm,
6 Mo    12 Mo

Max Current (100mW)

Max Change, ppm,  23°C ±5°C

Calibration Uncertainty ±ppm

Maximum Voltage (and Gradient)

5420-1

1

2

4

5

0.32 A

3

1

0.5 V

5420-10

10

2

4

5

0.1 A

3

1

1 V

5420-25

25

2

4

5

63 mA

3

1

1 V

5420-100

100

2

4

5

32 mA

3

1

2 V

5420-1K

1 K

2

4

5

10 mA

3

1

10 V

5420-10K

10 K

2

4

5

3.2 mA

3

1

30 V

5420-100K

100 K

2

4

5

1 mA

3

2

100 V

5420-1M

1 M

2

4

5

320 mA

3

2

100 V

5420-10M

10 M

2

6

10

100 mA

3

5

300 V

5420-100M

100 M

10

15

25

10 mA

5

10

1 kV

5420-1G

1 G

30

15

25

1 mA

15

30

1 kV

Need some high-accuracy working standards for precise, on-site resistance calibrations? If you would like to avoid the hassles of maintaining traditional standard resistors in oil baths, Hart has a complete assortment of air resistors manufactured by Measurements International with Hart’s proprietary DWF Connectors for resistors up to 10 kW.

The 5420 series covers values from 1 ohm all the way to 1 gig-ohm. These are the finest quality air resistors you can buy. They’re durable, easy to maintain and easy to use. If you’re calibrating multiple devices with resistors of 10 kW or less, you’ll love Hart’s DWF Connectors that handle banana plugs, spade lugs and bare-wire connections with just the push of a button. They really take the hassles out of making numerous connections to your resistors throughout the day. Resistors above 10 kW use traditional binding posts made of tellurium copper for maximum conductivity.

These resistors have an uncertainty of 1 ppm depending on the resistance as shown in the table. They’re ultra-stable and resistant to thermal and mechanical shock.

Essentially, you can’t find a better package than these air resistors, which combine Hart connector technology with Measurements International resistors.

Use our Feedback Form for more information, to request a catalog or for a Price Quote