purchase of equipments to the chemistry department as per order no. p3 / 27494 / 2020 / dce thiruvananthapuram dated 21 / 11 / 2020 - 2 digital conductivity meter: microprocessor based conductivity meter measuring frequency: 1000 hz conductivity range: 20μs / cm to 1000 ms / cm in 5 ranges, 20μs, 200 μs, 2000 μs, 20ms, 200ms nresolution: 0.01μs / cm temperature compensation: auto 0-100 °c / man 0-100 °c display: 16 x 2 alphanumeric lcd display memory: can store up to 100 readings power supply: 230v a.c, 50hz conductivity cell: provided with cell constant 1 cm-1 temperature sensor: provided for atc complete with conductivity cell ( cc-1 ) , pt-100 temperature sensor, manual, cell stand, certifications: iso warranty: 1 year , systronics / elico / shimadzu 3 digital potentiometer: mvrange: 0 to ±1999 v, mv resolution :1mvcontrol: set zero range: 0 to ±1500mv input, stirrer speed: adjustable, switch : hold reading when pressed , polarity: automatic, magnetic stirrer: in-built with variable control, display: 3 ½ digit led, accessories: combined pt. & ref. electrode , electrode stand & clamp, stirrer pedal, warranty: 1 year systronics / elico / shimadzu 4 digital ph meter with electrode: nrange: 0 to 14 ph, resolution: 0.01ph, accuracy: ±0.01ph ncalibration points: up to 3 points with auto buffer recognition. nbuffer options: 4, 7, 9, mv range: + / - 1999, mv accuracy: + / -1mv nresolution: + / -1mv, temperature range: 0-100 0c naccuracy: + / -0.50c, resolution: + / -0.10c nauto / manual temperature compensation ninstrument should have hold function & auto off function. ndisplay: 135x75mm lcd naccessories: combined ph electrode, temperature probe, n electrode stand.warranty: 1 year nsystronics / elico / shimadzue 5 digital abbe refractometer: nmeasuring range 1.300 to 1.700, accuracy-0.0002, sugar percentage scale-0 -95%, with glass standard plate, attachable thermometer, contact solution for use with standard plate , dust cover 6 electronic balance digital: n nelectronic precision balance 3 digits, accurate up to 0.001g resolution 0.001g, maximum capacity: 300g, display: lcd with back light , npan size greater than100 mm dia, in built re-chargeable battery back up. glass windshield, low battery indicator, auto zero tracking, overload protection design, front red led display, automatic switch off option 7 digital photocolorimeter: micro controller based digital colorimeter with 8 filters , auto zero facility, display of % t, abs with 6 glass test tubes, peak wavelength –410nm, 470nm, 490nm, 520nm, 540nm, 580nm, 610nm & 640nm, sample volume – min. 1 ml, absorbance- -0.1 to 2.0 abs, repeatability - ± 0.01 abs, readability- abs- 0.01, light source – led, detector – silicon photo dioderesolution: 1%t in 0.01 abs upto 1.99 abs power: 230 v ac±10%, 50 hz , 1 year warranty 8 stalagmometer: time of flow of water 50-70 sec ( calibrated ) 9 deioniser: n npvc i frp columns, charged separately with high exchange capacity cation& anion resin. analog i digital conductivity meter with alarm -to monitor the quality of treated water. pvc flexible tube with necessary pp connectors for inlet & outlet. all materials housed in a trolley mounted, corrosion proof powder coated mild steel skid for mobility. a chemical proof frp tank for regeneration. capacity: 100litres per hour treated water output conductivity: <10μs 10 hot air oven: ndouble walled, inner stainless steel chamber of size: 45x45x45cms, outer body: powder coated ms sheet, 2 stainless steel shelves, 1200watts, temperature range: 35-2100c, accuracy: + / -10c, glass wool insulation of more than 60mm thick, power: 1200watts, provided with digital temperature controller & indicator and digital soak timer. 11 tlc applicator ntlc kit with applicator and jar with following accessories. nthin layer drawing board, drying rack, spotting guide, developing chamber, glass pipette, silica gel, glass plates 12 melting point and boiling point apparatus ncovered cylindrical silicon oil bath for safety of operator.built-in magnetic stirrer with electronic speed controller.electronic controller for adjusting the heating rate.digital display of temperature with pt-100 sensor.glare-free back-ground led light with adjustable light intensity.provision for holding the melting point display when sample melts.built-in image magnifier for clear vision of sample. ntemperature range up to 300?. least count 1° c 13 magnetic stirrer with hot plate nmaximum stirring volume 1 litre, high speed rpm 0-2200rpm, temperature range 0-3000c, electronic speed regulator for magnetic stirrer nred aluminium die casting housing, ceramic top, should have suitable magnetic bar for stirrer 14 laboratory polarimeter nsuperior quality triple shadow system. triple shadow system rotates with the circle thus affording immediate indication of the direction of the material being examined.permanent focus with difficult and dark liquids. high accuracy and repeatability along with strain free viewing tube length ( maximum ) : 220 mm, angular scale: 0-360º nangular scale accuracy: ±0.05º, international sugar scale: ±130º niss accuracy: ±0.1°z, light source: sodium lamp nsize: 27x13 1 / 2 141 / 2, warranty: 1 year warranty 15 double distillation unit - all borosil® / pyrex® / nborosilicate boiler, borosilicate condenser & quartz heater, horizontaltype, dist water output: 1.5 litres / hr nconductivity, μscm-1 ( 0.8-1.2 ) , temperature: 65- 75°c nelectricity supply: 230-250v, power requirement: 3kw nbuilt in acid funnel and teflon drain stopcock to allow easy decaling without dismantling the glassware., biological activity: output water should be pyrogen free water., automatic electronic cut-off system with flow switch and, pt-100 sensor 16 teflon lined stainless steel hydrothermal autoclave / bomb reactor: 100 ml capacity, warranty: 1years , internal dimension 30-60mm diameter ( teflon ) , capacity:100 ml, temperature 200-250oc, inner shell ptfe liner, working pressure =1400 psi 17 portable water analyser system nparameters: ph, orp, conductivity, tds, resistivity, salinity & temperature, microprocessor based operation, storage & recall facility for minimum 500 samples, reset & auto hold function, calibration due reminder, auto / manual temperature compensation, range: 1 to 14ph, resolution: 0.001ph, 0.01, 0.1 ( user selectable ) , accuracy: + / - 0.002ph, calibration points: up to 5 points with auto buffer recognition. buffer options: 2, 4, 7, 9, 12, orp range: + / - 1999.9, orp accuracy: + / -0.2mv, orp resolution: + / -0.1 / 1mv selectable, measuring mode: absolute mv or relative mv, conductivity range: 0-200ms / cm , conductivity resolution: 0.01 / 0.1 / 1, conductivity accuracy: + / -0.5% of full scale reading, cell constant : 0.1 / 1 / 10 / user defined , calibration: up to 5 points with push button switch ndefault calibration points: 10 μs, 84 μs, 1413μs, 12.88ms, 111.8ms and user defined, tds range: 0-10ppt, tds factor- up to 1.0 nsalinity range: 0-80ppt, salinity resolution: 0.01 / 0.1 / 1 , measurement units: practical salinity –psu, sea water measurement- ppt, resisitivity range: 0-100mo, resistivity resolution: 0.01 / 0.1 / 1, accuracy: + / -1% of full scale reading ntemperature range 0-1000c, accuracy: + / -0.50c naccessories : ph electrode, ph buffer solutions ( 4.01, 7, 10.01 ) conductivity cell ( k-1.0 ) , temperature probe, electrode stand 18 nitrogen cylinder with regulator: n nhigh pure nitrogen gas cylinder, capacity 47 litres, weight: 52 kg approx., material: iron, test pressure 250bar with high quality regulator with isi certified brass nozzle and 99.999% purity nitrogen gas. 19 thermostatic double walled waterbath: n nsize: 35x25x12.5cms, no of holes: 6, thermostatic control, provided with concentric rings of dia 75mm, temperature range: 300c to 1100c, provided with 1100 c mercury thermometer. ninner tank and lid made of stainless steel ( ss-304 grade ) nouter chamber is made of mild steel duly powder coated.