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HARS Series RESISTANCE DECADE BOX
HARS Series Resistance Resistor Decade Box

HARS Resistance Decade Box. Standard Resistor Decade.
HARS Series Resistance Resistor Decade is the best choice when you need a laboratory grade, tight tolerance, high performance resistance decade box that is also cost effective.
Zero Resistance: <1 m per decade, at dc; slightly higher for 7-10 decades.
Maximum Voltage to Case: 2000 V peak.
Switch Type: 11 positions; "0"-"10"; multiple solid silver alloy contacts.
Switch Capacitance: <4 pF per switch, low loss.
Terminals: Low thermal emf beryllium copper binding posts with standard 3/4 inch spacing plus shield terminal; connections from the rear of the instrument are available with RO option. 
Solderable terminals for single decade units.

  • Resistance from 1 mΩ to 111 MΩ

  • Excellent stability - 10 ppm/yr, 25 ppm/ 3 yrs

  • Wide choice - single through 11 decade units

  • High accuracy - 0.01% (100 ppm)

    • HARS-Z: ±(50 ppm + 1 mΩ)

    • HARS-X: ±(0.01% + 2 mΩ)

    • HARS-A: ±(0.05% + 2 mΩ)

    • HARS-Q: ±(0.02% + 2 mΩ)

    • HARS-B: ±(0.1% + 4 mΩ)

  • Very low zero resistance: <1 mΩ per decade

  • High performance solid silver alloy switches

  • Low temperature coefficient - 5 ppm/°C

  • Noninductive or low inductance resistors

  • Rack mounting available

  • Special and custom configurations available

Single decade units are available with resistance as low as 1 milliOhm per step to as high as 10 MOhm per step. 
These units satisfy many system applications requiring only a single decade while maintaining all the quality features of the HARS series.
Each decade is enclosed in an aluminum case which can serve as a shield.
It may be panel mounted and integrated with additional units to form potentiometer circuits or other configurations. 
Each unit consists of low inductance resistors in series, with a high performance
solid silver alloy contact switch.

Model*
(0.01% Accuracy)

Total Res.
(Ohm )

No. of
Decades

Resolution
(Ohm )

HARS-X-1-0.001
HARS-X-1-0.01
HARS-X-1-0.1
HARS-X-1-1
HARS-X-1-10
HARS-X-1-100
HARS-X-1-1K
HARS-X-1-10K
HARS-X-1-100K
HARS-X-1-1M
HARS-X-1-10M

0.01
0.1
1
10
100
1 k
10 k
100 k
1 M
10 M
100 M

1
1
1
1
1
1
1
1
1
1
1

0.001
0.01
0.1
1
10
100
1 k
10 k
100 k
1 M
10 M

HARS-X-2-0.001
HARS-X-2-0.01
HARS-X-2-0.1
HARS-X-2-1
HARS-X-2-10
HARS-X-2-100
HARS-X-2-1K
HARS-X-2-10K
HARS-X-2-100K
HARS-X-2-1M

0.11
1.1
11
110
1.1 k
11 k
110 k
1.1 M
11 M
110 M

2
2
2
2
2
2
2
2
2
2

0.001
0.01
0.1
1
10
100
1 k
10 k
100 k
1 M

HARS-X-3-0.001
HARS-X-3-0.01
HARS-X-3-0.1
HARS-X-3-1
HARS-X-3-10
HARS-X-3-100
HARS-X-3-1K
HARS-X-3-10K
HARS-X-3-100K

1.11
11.1
111
1.11 k
11.1 k
111 k
1.11 M
11.1 M
111 M

3
3
3
3
3
3
3
3
3

0.001
0.01
0.1
1
10
100
1 k
10 k
100 k

HARS-X-4-0.001
HARS-X-4-0.01
HARS-X-4-0.1
HARS-X-4-1

11.11
111.1
1.111 k
11.11 k

4
4
4
4

0.001
0.01
0.1
1

HARS-X-4-10
HARS-X-4-100
HARS-X-4-1K
HARS-X-4-10K

111.1 k
1.111 M
11.11 M
111.1 M

4
4
4
4

10
100
1 k
10 k

HARS-X-5-0.001
HARS-X-5-0.01
HARS-X-5-0.1
HARS-X-5-1
HARS-X-5-10
HARS-X-5-100
HARS-X-5-1K

111.11
1.1111 k
11.111 k
111.11 k
1.1111 M
11.111 M
111.11 M

5
5
5
5
5
5
5

0.001
0.01
0.1
1
10
100
1 k

HARS-X-6-0.001
HARS-X-6-0.01
HARS-X-6-0.1
HARS-X-6-1
HARS-X-6-10
HARS-X-6-100

1.111 11 k
11.1111 k
111.111 k
1.111 11 M
11.1111 M
111.111 M

6
6
6
6
6
6

0.001
0.01
0.1
1
10
100

HARS-X-7-0.001
HARS-X-7-0.01
HARS-X-7-0.1
HARS-X-7-1
HARS-X-7-10

11.111 11 k
111.1111 k
1.111 111 M
11.111 11 M
111.1111 M

7
7
7
7
7

0.001
0.01
0.1
1
10

HARS-X-8-0.001
HARS-X-8-0.01
HARS-X-8-0.1
HARS-X-8-1

111.111 11 k
1.111 111 1 M
11.111 111 M
111.111 11 M

8
8
8
8

0.001
0.01
0.1
1

HARS-X-9-0.001
HARS-X-9-0.01
HARS-X-9-0.1

1.111 111 11 M
11.111 111 1 M
111.111 111 M

9
9
9

0.001
0.01
0.1

HARS-X-10-0.001
HARS-X-10-0.01

11.111 111 11 M
111.111 111 1 M

10
10

0.001
0.01
HARS-X-11-0.001 111.111 111 11 M 11 0.001

* For less exacting applications, more economical tolerances are available:
- use "A" for "X" in part number for 0.05% basic accuracy, in lieu of .01%
- use "Q" for "X" in part number for 0.02% basic accuracy, in lieu of .01%
- use "B" for "X" in part number for 0.1% basic accuracy, in lieu of .01%

OPTIONS
- RM Rack mountable case for standard 19" rack
- K Kelvin type 4-terminal binding posts
- RO Rear output binding posts

Please email sales@hotektech.com or call 253-927-6186 if you are interested in a purchase, or
  need additional information.

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