Laboratory Instruments

Designed for accurate and quick examination of the

a)	Refracttive Index
b)	Mean Dispersion of liquids, solids and powder.

ND Range :	ND 1.300 to ND 1.700 in step of 0.001
Accuracy :	± 0.0002
Sugar (Percentage) :	0 to 95 % in steps of 1 divisions
Accuracy :	0.5 %
Temperature :	0-1000 C

The body of the instrument is fixed having a leaning of 600, correct refractive index and sugar percentage can be read directly in the field.
It consists of abbe double prism compensator, telescope mirror limb, grauduated sector, reading magnifier and a radial arm which carries a vernier, Abbe's double prism leaves a narrow space (about 0.1 mm.) between the adjoining the faces of prisms and compensator consists of the amici prism which serves for rendering the line of achromatic separation. A thermometers fitted on the double prism

Abbe Double prism are heated by a double jacketed water bath in which warm water under 700 C circulates. The temperature of the water can be adjusted and read by the thermometer fitted on the double prism.

The instrument can be used fsor measurement of fats in ghee and other such products giving a reading directly in terms of the oil scale also known as butyro scale. The micrometer eye-piece allows an accuracy on this scale of 0.1 and the oil scale using may also be converted in a refractive index scale using conversion tables. This allow measuremention materials with index of refraction in the range of 1.42 to 1.49 with an accuracy of 0.0002 as tables are supplied for converting oil scale reading into index of refraction, relative to mean sodium lines. The prism box is water jacketed for temperature control and a sample achromatising device enables the removal of all colours from the border line thus enabling the instrument to be used with white light.
The instrument is provided with a test liquid for checking and resetting the scale if necessary and is encased in a portable wooden box. Recraction range from 1.42 to 1.49 with accuracy of 0.0002 fitted with sugar and oil scale, sugar scale 50-80% and oil scale 0-100 %

676/01	0-32 %
676/02	0-50 %
676/03	28-60 %
676/04	58-90 %

Consista of laurent half shade, polariser, analyser, brass scale graduated from 0 to 3600 or 0-1800 with vernier reading 6" and accomodates a 200 mm. Glass tube. It is packed in a card board box.

Consists of laurent half shade, polariser, analyser, brass scale graduated from 0 to 3600 or 0-1800 with vernier reading 6" and accomodates a 200 mm. Glass tube. It is packed in a card board box. With Bi-quartz or Tri-quartz.

used in medical, pharmaceutical and chemical reserach laboratories. Consists of a imported half shade nicol polariser, analyser, 100 mm. diameter circular scale divided - 300 to + 1300 10 ISS, a divident micrometer drum is given to read 0.050 ( e minutes) and 0.10 ISS, the scale is properly illuminated for taking readings, the body is very sturdy and a separate sodium lamp stand is provided. Complete with polarimeter tube, bubble traps at the centre, 200 mm. sodium lamp with stand and transformer

used in medical, pharmaceutical and chemical reserach laboratories. Consists of a imported half shade nicol polariser, analyser, 100 mm. diameter circular scale divided in degree 0 - 3600 x 10 and a sugar scale divided - 300 to + 1300 x 10 ISS, a dividend micrometer drum is given to read 0.050 (3 minutes) and 0.10 ISS, the scale is properly illuminated for taking readings, the body is very sturdy and a separate sodium lamp stand is provided. Complete with polarimeter tube, bubble traps at the centre. Without sodium lamp,stand and transformer.

Same as Cat. No. 680 but with 400 mm. Tube with sodium lamp, stand and transformer.

Same as Cat. No. 874 but without sodium lamp, stand and transformer.

8" (20 cm.) dia. Brass frame, without joint and with a S.S. cloth

CAT NO	B.S.S. Mesh No	ASTM No	I.S.S No	Width of Aperture
684/01	4	5	480	4.75 mm
684/02	5	6	340	3.35mm
684/03	6	7	280	2.80 mm
684/04	7	8	240	2.36 mm
684/05	8	10	200	2.00 mm
684/06	10	12	170	1.70 mm
684/07	12	14	140	1.40 mm
684/08	14	16	120	1.18 mm
684/09	16	18	100	1.00 mm
684/10	18	20	85	850 microns
684/11	22	25	70	710 microns
684/12	25	0	60	600 microns
684/13	30	35	50	500 microns
684/14	35	40	40	425 microns
684/15	44	45	35	355 microns
684/16	52	50	30	300 microns
684/17	60	60	.25	250 microns
684/18	72	70	20	212 microns
684/19	85	80	18	180 microns
684/20	100	100	15	150 microns
684/21	120	120	12	125 microns
684/22	150	140	10	106 microns
684/23	170	170	9	90 microns
684/24	200	200	8	75 microns
684/25	240	230	7	63 microns
684/26	300	270	6	53 microns
684/27	325	300	5	45 microns
684/28	350	325	4	44 microns
684/29	400	380	3	40 microns

8" dia. (20 cm.) brass frame, with steel sheet square punching :

125 mm., 106 mm., 100 mm., 90 mm., 80 mm.

75 mm., 63 mm., 53 mm.,50 mm., 45 mm.

40 mm., 37.5 mm., 31.5mm., 26.7 mm., 25 mm.

22.4 mm., 20 mm., 16mm., 13.2 mm., 12.5 mm.

11.2 mm., 10 mm., 8 mm.,6.7 mm., 6.3 mm.

5.6 mm., 4.75 mm.

12" dia., (30 cm.) G.I. Sheet frame, with steel sheet square punching :

125 mm., 106 mm., 100 mm., 90 mm., 80 mm.

75 mm., 63 mm., 53 mm.,50 mm., 45 mm.

40 mm., 37.5 mm., 31.5mm., 26.7 mm., 25 mm.

22.4 mm., 20 mm., 16mm., 13.2 mm., 12.5 mm.

11.2 mm., 10 mm., 8 mm.,6.7 mm., 6.3 mm.

5.6 mm., 4.75 mm.