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 Email: sales@hotektech.com
Home > Standards > Resistance Decades > HARS Resistance Decade

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.

HARS Resistance Decade Box.

Model  Description 
HARS  HARS Resistance Decade Box.

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.

HARS Resistance Decade Box.
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



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


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


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

11.11
111.1
1.111 k
11.11 k
111.1 k
1.111 M
11.11 M
111.1 M 

4
4
4
4
4
4
4


0.001
0.01
0.1
1
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


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


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


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


0.001
0.01
0.1


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


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

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