Lab Resistance Instrument

a. Resistance Boxes :-

(plug type ) Coils are non inductive & are enclosed in a teak wood polished case with heavy bakelite top & rectangular brass blocks. The plugs with oval grips on perfect Constant & interchangeable. Resistance values engraved on the plate or on the top of brass block Constantan coil Precision quality, consisting of 1/2" thick brass block

i. 0.1 to 1 ohms
ii. 0.1 to 5 ohms
iii. 0.1 to 10 ohms
iv. 0.1 to 50 ohms
v. 0.1 to 100 ohms
vi. 0.1 to 500 ohms
vii. 0.1 to 1000 ohms
viii. 1 to 10 ohms
ix. 1 to 50 ohms
x. 1 to 100 ohms
xi. 1 to 500 ohms
xii. 1 to 1000 ohms
xiii. 1 to 5000 ohms
xiv. 1 to 10000 ohms

b. Resistance Box :-

Same as above but Educational Quality (routine quality) rectangular routine brass block of 10.5 mm. Thick & can be supplied in round block also.

i. 0.1 to 1 ohms
ii. 0.1 to 5 ohms
iii. 0.1 to 100 ohms
iv. 0.1 to 500 ohms
v. 0.1 to 100 ohms
vi. 0.1 to 500 ohms
vii. 0.1 to 1000 ohms
viii. 1 to 10 ohms
ix. 1 to 50 ohms
x. 1 to 100 ohms
xi. 1 to 500 ohms
xii. 1 to 1000 ohms
xiii. 1 to 5000 ohms
xiv. 1 to 10000 ohms

c. Resistance Box :-

Same as above but made of Manganin Coils, Consisting of 1/2” thick brass block

i. 0.1 to 1 ohms
ii. 0.1 to 5 ohms
iii. 0.1 to 10 ohms
iv. 0.1 to 50 ohms
v. 0.1 to 100 ohms
vi. 0.1 to 500 ohms
vii. 0.1 to 1000 ohms
viii. 1 to 10 ohms
ix. 1 to 50 ohms
x. 1 to 100 ohms
xi. 1 to 500 ohms
xii. 1 to 1000 ohms
xiii. 1 to 5000 ohms
xiv. 1 to 10000 ohms

d. Resistance boxes (Standard Quality ) :-

1) Resistance Boxes Standard quality plug type very accurate fitted rectangular gun metal Heavy Block and spray painted Box, coils are connected in the double nut system Export Quality
2) Accuracy + 0.02% to + 0.05% 14 mm square gun metal blocks available in Constantan coil as well as in Manganin coil.

3) IN CONSTANTAN COIL:-

i. 0.1 to 1 ohms
ii. 0.1 to 5 ohms
iii. 0.1 to 10 ohms
iv. 0.1 to 50 ohms
v. 0.1 to 100 ohms
vi. 0.1 to 500 ohms
vii. 0.1 to 1000 ohms
viii. 1 to 10 ohms
ix. 1 to 50 ohms
x. 1 to 100 ohms
xi. 1 to 500 ohms
xii. 1 to 1000 ohms
xiii. 1 to 5000 ohms
xiv. 1 to 10000 ohms

4) IN MANGANIN COIL :-

i. 0.1 to 1 ohms
ii. 0.1 to 5 ohms
iii. 0.1 to 10 ohms
iv. 0.1 to 50 ohms
v. 0.1 to 100 ohms
vi. 0.1 to 500 ohms
vii. 0.1 to 1000 ohms
viii. 1 to 10 ohms
ix. 1 to 50 ohms
x. 1 to 100 ohms
xi. 1 to 500 ohms
xii. 1 to 1000 ohms
xiii. 1 to 5000 ohms
xiv. 1 to 10000 ohms

a) Platinum Resistance Thermometer :

Platinum wire having resistance of 2.8 ohms wound on a mica frame. Two leads of Platinum wire and two compensatory leads terminals are provided. Enclosed in Pyrex Glass tube. OSAW Pattern. In valvet case.


b) Platinum Resistance Thermometer :

INCO Pattern in stainless steel tube Resistance 2.5 ohms to 2.8 ohms

a) Resistance Coils:

In round bakelite case with terminals any value 0.1 to 100 ohms tested accurate.

b) Resistance Coils :

In transparent case like PARCO any value from 0.1 to 100 ohms.

c) High Resistance coils :

Known or unknown constant an coil in the bakelite case with two terminals.

a. 1k, 2k, 5k
b. 10k, 15k

d) High Resistance Coil :

(Known or unknown)Wire Wound coils provided with plug type short circuit key.
Resistance

a. 1k, 2k, 5k,
b. 10k, 15k

e) Resistance Coil :

Bakelite Case Pye Type comprising non-inductively wound coil of insulated constant an wire, further insulated with parafin Wax and enclosed in moulded bakelite case fitted with terminals, any value from 0.1 to 1000 ohms.

f) Precision Resistance Coils :

With four terminals as per ‘INCO’ Specification.
Resistance : 0.01 to 0.9 ohm 0.1 to 100 ohms

a. In Aluminium case
b. In Bakelite case

g) Resistance Coil Standard (Manganin):

The Unit embodies developed at the National Physical Laboratory. Those are manufactured for work requiring high degree of accuracy and research works. Values calibrated are guranteed within specified Limits. 
Coils wound on porcelain bobbins immersed in moisture free oil.; The whole system is in Brass nicked vessel accuracy +0.02% to +0.05%

i. 0.01 ohms
ii. 0.1 ohms 
iii. 1 ohms & 10 ohms 
iv. 100 ohms 
v. 1000 ohms

a) Dial Type Resistance Boxes :-

Comprising dial of non – inductive wound coils of constant an wire connected in series. The panel is of bakelite, clearly engraved with the individual resistance values Mounted in well wrinkled colored metal box very new design, export quality. Accuracy within + 0.1%
A) Single Dial
B) Two Dial
C) Three Dial
D) Four Dial
E) Five Dial

b) Resistance Box Dial Pattern :-

Specification is same as cat No 495 but coil are made of manganin wire connected in series ‘A’ grade Accuracy + 0.05%
A) Single Dial
B) Two Dial
C) Three Dial
D) Four Dial
E) Five Dial

Please Note :
Above Mention Resistance Box Dial Type are supplied with 0.1, 1, 10, 100,
1000 ohms dials. Please specify range while placing order that it is tenths, units, tens or hundreds etc.

c) Resistance Box Dial Type Constant a Coil :-

1) However dial of 0.1 ohms in Resistance box described under as above are supplied at an extra cost.
2) Dial of 10000 ohms in Resistance box described under Cat No. 495 are supplied at an extra cost. 

d) Resistance Box Dial Type : Manganin Coil:

1) However Dial of 0.01 ohms in Resistance box described under as above are supplied at an extra cost.
2) Dial of 10000 ohms in Resistance Box described under Cat No. 496 are supplied at an extra cost. 

e) Dial Type Resistance Box :

Single Dial very cheap quality having carbon resistance.
1) Single Dial (units)
2) Single Dial (tens)
3) Single Dial (Hundreds)

f) Dial Type Resistance Box :

Two Dials very cheap quality having carbon resistance.
1) Units & Tens
2) Units & hundreds

Product description:

This decade resistance substitution box provides 4 decade ranges from 0 to 11110W with a resolution of 1W. Each decade is selected by a rotary switch. Tapping points are provided across each range to allow the unit to be used as an accurate potential divider. All resistance values are + 2% with a rating of 0.25 W maximum per range.

Power Rheostats are made with a variety of resistance & current carrying capacity so as to satisfy every need. They are wound with heavily oxidized eureka resistance wire upon a porcelain tube dia 44 mm aprox. The tube is carrying upon Bakelite rider and the heavy duty sliding contact is of the phosphor bronze with brass rod. 4 mm socket terminals are fitted, allowing for rheostat or potentiometer connection. Total resistance and maximum current capacity is marked on the slider. Total Permanent current loading should not exceed 75% of the marked values. The actual resistance of Wire Wound Rheostats shall be +20% -5% of the rated resistance as per our resistance chart.  specification no. we are recognized as one of the major Electronic Rheostats Manufacturers and Exporters from India.

Resistance Box (Plug Type) is of a superior quality Heavy Brass Metal Blocks Size 7/16" are bound to Bakelite Plate by means of nuts and screws securing rigid fixation and eliminating any chance of contact error creeping due to loosening of plugs and lugs which are cut to fine taper and are interchangeable. Plug heads are machine moulded, of heavy insulated Bakelite in beautiful shapes. The boxes are made of Teak-wood and nicely polished. We are renowned as one of the staggering High Power Resistance Box Suppliers in India.

Great care is taken in preparing the wire wound resistance. Selected double Covered Eureka Wire is wound in Bakelite spools. Sufficient ageing and Heat Treatment is processed through to avoid any moisture effects. Solder Joints are sealed after calibration. The Decade Resistance Box is calibrated on imported Testing Bridge Accuracy ± 0.1%.