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Polytech Instruments Pvt.Ltd.

Polytech Instruments Pvt.Ltd.
Ghodbunder Road, Thane, Maharashtra

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Call 08068051313 Ext. 375

Our Products

  1. Testing Equipment 67 Products available
  2. Laboratory Equipments 13 Products available
  3. Measurement Gauges & Fittings 12 Products available
  4. Measuring Instruments & Equipment 11 Products available
  5. Laboratory Apparatus 8 Products available
  6. Medical Equipment & Supplies 5 Products available
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  10. Analyzers And Analytical Instruments

    2 Products available
  11. Others Products 45 Products available

Laboratory Apparatus

Our Complete range of products are Vicat Softening point apparatus, Bulk Density Apparatus, Test Sample Molding Apparatus, Environmental Stress Cracking Apparatus and UNRESTRAINED LINEAR THERMAL SHRINKAGE APPARATUS.

Vicat Softening point apparatus

Vicat Softening Point Apparatus
Designed and built to cover multiple International Testing Standards theRay-Ran Advanced HDT/Vicat Apparatusutilises microprocessor technology to accurately determine the deflection and softening point characteristics of all thermo plastic test specimens.
TheHDT/Vicat apparatusallows for multiple simultaneous testing of samples depending on the amount of test stations available, either 2 or 4. The simple manually operated raise and lower function of the test stations ensure easy access to the test sample supports for sample loading and retrieval before and after each test.
Each test station is fitted with a PT100 platinum resistance thermometer which accurately records the temperature next to the sample under test to 0.1C and an electronic displacement transducer which measures the sample displacement to 0.01mm as standard or to 0.001mm as an option. The on board microprocessor ensures test result accuracy and repeatability and the built in liquid crystal display (LCD) provides simple on screen instructions reducing user error. Test parameters are easily selected using the onboard membrane keypad. A simple data selection process and yes/no prompts make the operating procedure very simple to undertake. The microprocessors temperature control function ensures the ramping rates of either 50C/h or 120C/h are kept within the specified test standard requirements as well as performing non standard ramp rates to customers own specific needs. Test temperatures of 300C are easily achieved and to ensure optimum safety at higher temperatures the Nitrogen Blanket option is recommended.

The methods of testing available on the apparatus are

HDT - Heat deflection / distortion testA standard sized test specimen is subjected to a bending stress, whilst the temperature is raised at a uniform rate. The temperature at which the specified deflection occurs is measured and recorded. Testing is carried out in accordance with the ISO 75 (parts 1, 2 and 3) and ASTM D648 Test Standards.For this test a required fibre stress of 0.45, 1.8, or 8.00 MPa is easily selected. Custom fibre stresses can also be managed by the microprocessor if required. The unique binary weight system is used to apply the required fibre stress to the test sample and is automatically calculated by the microprocessor based on the sample size and span supports. Temperature ramp rates, sample size, span and deflection values are also easily entered into the testing parameters of each station. The HDT span supports of 100mm or 64mm are easily adjusted on each tool station to suite your testing method of Flat wise or Edgewise sample testing.Each machine is supplied with HDT test nibs with 3mm radius which are easily attached to the load displacement rods for testing in accordance with relevant international test standards.

Vicat (VST) - Softening point testA specified needle (indentor) penetrates a specified distance into a sample with a specified load, whilst the temperature is raised at a uniform rate. The temperature at which the sample was penetrated is recorded as the Vicat Softening Temperature (VST). Testing is carried out in accordance with the ISO 306 and ASTM D1525 Test Standards.For this test penetration loads are easily selected via the microprocessor for use with the single loading weights of 10 N and 50N. The supplied cylindrical indentor test nib with 1mm surface area is attached to the load displacement rod for sample testing in accordance with relevant testing standard.
The apparatus is supplied as standard with an integrated solenoid operated cooling system which is automatically activated after each test. It can be connected to either a standard water supply or to the optional chiller unit for improved heat reduction. The integrated cooling coil ensures rapid heat loss back to start temperature conditions within a short time period increasing production.The self calibration feature of the apparatus ensures that the test results remain accurate. Unique calibration plugs are supplied with each machine which simply plug into the PRT socket for you to carry out the calibration procedure. Test results are downloaded to the supplied file capture software via the RS232 serial connector and are displayed in tabular format. Results can also be saved as .CSV files which can be opened with Microsoft Excel for data manipulation and report presentation. If required the optional thermal printer can be supplied and fitted to the apparatus for direct results printout.
Built with operator simplicity in mind, its ease of operation and high accuracy makes the Ray-Ran Advanced HDT/Vicat Apparatus ideal for product development and quality control within production, research and development labs and teaching institutions and should more than meet all of your testing requirements.
Technical Specification
  • HDT/Vicat testing enabled
  • Manual Raise/Lower of test stations
  • Advanced microprocessor control
  • 2 sample test stations
  • Digital temperature control
  • Temperature range to 300C
  • Resolution +/- 0.01mm
  • Oil bath stirrer
  • Solenoid operated cooling system
  • Integrated safety thermostat
  • HDT Heads (1 per station)
  • Vicat Nibs (1 per station)
  • Standard Fiber Stress 0.45, 1.8 or 8.00 MPa
  • User defined fiber stress for HDT testing available
  • Standard Vicat penetration of 0.1mm or 1.00mm
  • User defined penetration depth for Vicat testing available
  • Temperature resolution +/- 0.1C
  • Temperature ramp rates of 50 or 120 C/hr
  • User defined ramp rates available
  • HDT span supports 64mm or 100mm
  • Bath capacity 8 litres
  • RS 232 connection
  • RS232 Cable
  • Windows File Capture Software
  • Fully traceable certificate of calibration
  • Product user manual
  • CE declaration certificate
  • 1 year return to base warranty
  • 110v 240v 16amp
Optional Ancillaries
  • Binary HDT Test Weights (1 set required per station)
  • 1.00Kg Vicat Test Weight (1 required per station)
  • 5.00Kg Vicat Test Weight (1 required per station)
  • Displacement Transducer 0.001mm
  • Light Weight Load rods to test to .45 MPa
  • Heat Transfer Medium 5ltrs
  • Nitrogen Blanket
  • Air to Nitrogen Extractor
  • Thermal Printer
  • Thermal Printer Paper
  • Water Chiller unit
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bulk density apparatus

Bulk Density Apparatus

Bulk Density is a property of powders, granules and other "divided" solids
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Test Sample Molding Apparatus

Test Sample Molding Apparatus
The Ray-Ran Test Sample Injection Moulding Press has been specifically designed to produce a wide variety of laboratory test samples such as colour plaques, tensile and impact test specimens as well as small components required for mechanical testing procedures. The unique low cost moulding machine has a compact design for vertical bench mounting making the apparatus ideal for Research and Development Institutes, Universities, laboratories and small workshops. The apparatus is pneumatically operated with inlet air pressures up to 10 bar (150 psi) which is adequate for moulding most materials including Polypropylene, Polyethylene and PET with injection pressures up to 450 bar (6500 psi)
Digital temperature control up to 400 deg C melts the polymer which is then extruded into the mould. Digital tool block heating is included for more efficient polymer flow into the mould with temperatures up to 200 deg C to prevent freezing.
The apparatus is supplied with a quick release cam operated tool block which will accept low cost tool inserts machined to any shape that will fit within the Standard Tool Block parameters. This makes the apparatus ideal if different samples are required from the same material with minimal wastage and time. Tool Inserts to suit any International Standard, e.g. ASTM, ISO, DIN, JIS, etc., can be supplied for tensile dumbbells, colour plaques, impact bars, etc. For samples that cannot be easily moulded within the standard tool block, optional specialised tooling can be supplied to customers requirements within the parameters of the machine.
The unique interchangeable Cylinder Liner and Die assembly supplied as standard with the apparatus compliments the simplicity of the equipment during and after the moulding process as it enables the operator to change from one colour or material to another in just a few seconds, increasing production and eliminating the need for purging. Simply remove the cylinder liner being used and replace it with a clean one, wait for it to reach temperature, fill the liner with your new material and continue the moulding process. The used liner can then be cleaned at the operators convenience using a dedicated cleaning solution or ultrasonic cleaning bath. The 47cm capacity of the cylinder liner ensures multiple moulds can be made saving time and reducing valuable material wastage.
To mould a test sample polymer is loaded into the top of the liner which is heated to the required temperature to plasticise the polymer. When the injection piston is released the cylinder liner nozzle automatically locks into the injection gate of the tool block and the piston extrudes the polymer into the moulding plate insert. After the polymer has been allowed to set for a few seconds, the tool block cam is released and the moulding plate insert withdrawn. The moulded test sample is then removed, the injection gate is cleaned of any residual polymer and the moulding plate insert replaced and clamped in the tool block ready for the next sample to be moulded. For a more convenient flow of polymer into the cylinder liner an optional polymer feeder hopper can be supplied so the liner is always topped up after each mould is produced ensuring a countless moulding process.


Technical Specification
  • Pneumatically operated
  • Maximum Air Line Pressure: 150 psi/10 bar
  • Maximum Polymer Pressure: 6500 psi/450 bar
  • Maximum Shot Size: 47cm
  • Maximum Sample Sizes 175mm (L) x 45 (W) x 12.7 (T)
  • Digital Temperature Control
  • Automatic Nozzle-to-tool Locking Device
  • Cam-lock Tool Block
  • Quick Change Cylinder, Nozzle & Die
  • Visual alarms for Tool Locking
  • 110v 60hz and 240v 50Hz
  • Product user manual
  • Traceable calibration certificate
  • CE declaration certificate

Optional Ancillaries
  • Polymer Feeder Hopper
  • Low cost moulding Inserts available to all International Standards
  • Quick Change Cylinder, Nozzle & Die
  • Air compressor
  • Non standard tool block
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Environmental Stress Cracking Apparatus

Environmental Stress Cracking Apparatus
The Ray-Ran Environmental Stress Cracking Apparatus determines the susceptibility of ethylene plastics to stress-cracking when exposed to different environments such as soaps, wetting agents, oils and detergents. When the material is under certain conditions of stress these reagents can accelerate the cracking process which is one of the most common causes of unexpected brittle failure of polymers known. Designed in accordance with the ASTM D1693 international test standard the apparatus is extremely cost effective and very simple to use.
Manufactured to a high standard the apparatus is supplied with electronic digital temperature control, temperature bath and all tooling accessories.
The integrated temperature bath fitted with a digital temperature controller, heater and a PT100 platinum resistance thermometer accurately maintains the test temperature, usually 50 C or 100 C 0.5 C. To ensure temperature stability within the bath a stirrer motor system is fitted and the built in electronic timer monitors the duration of the test.
The bath is fitted with a stainless steel sample rack which holds up to 48 glass test tubes which are immersed in a heat transfer medium such as silicone oil. Rubber stoppers to seal the tubes and test sample specimen holders in either stainless steel or brass (optional) are also supplied for each tube. The specimen holder is designed to maintain a constant stress on the mid section of the test samples with up to 10 specimens fitted into a specimen holder at one time.
The unique set of tooling accessories required to produce your test samples include:
  • Test Sample Cutter
  • Sample Nicking Jig - Used to make a controlled imperfection in the test sample
  • Sample Bending Clamp - Used to induce a concentrated stress in the sample
  • Sample Transfer Tool - Used to move the test samples from the bending clamp into the specimen holders
To conduct a test the material is cut to the required shape and shape and marked with a concentrated notch. An induced stress is made on the sample and it is place into the test sample rack and moved to the test tube which is filled with the test reagent and placed into the test bath at a constant temperature. At timed intervals the samples are checked for any cracks developing at 90 to the notch. The number of failures is recorded.

Technical Specification
  • PID electronic temperature control
  • Resolution 0.1C
  • PT100 PRT sensor accurate to 0.1C
  • Integrated stirrer motor
  • Electronic Timer HR:MIN:SEC
  • Stainless steel liquid bath
  • Sample Cutter
  • Sample nicking jig
  • Sample bending clamp
  • Sample Specimen holders (Stainless steel)
  • 48 glass test tubes
  • Rubber stoppers
  • Product user manual
  • CE declaration certificate
Optional Ancillaries
  • Heat Transfer Medium (Silicon Oil)
  • Sample Specimen holders (Brass)
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UNRESTRAINED LINEAR THERMAL SHRINKAGE APPARATUS

UNRESTRAINED LINEAR THERMAL SHRINKAGE APPARATUS
Designed and manufactured by Ray-Ran the Unrestrained Linear Thermal Film Shrinkage Apparatus or more commonly referred to as the liquid immersion method is used to determine the thermal shrinkage of plastic film & sheeting.
As a result of manufacturing processes, internal stresses may be locked into a film or sheet which can be released by heating which causes shrinkage of the material. The amount of shrinkage which takes place is dependent on the temperature during the test. The results are plotted on a graph showing percentage shrinkage against temperature.
Manufactured to a high standard the apparatus is supplied with electronic digital temperature control, temperature bath and all tooling accessories.
The integrated temperature bath fitted with digital temperature controller, heater and a PT100 platinum resistance thermometer accurately maintains the test temperature to within 0.5 C. To ensure temperature stability within the bath a stirrer motor system is fitted and the built in electronic timer monitors the duration of the test.
The apparatus comes as standard with stainless steel specimen holders which hold the film samples of 100mm x 100mm square. A sample cutting template of the same size is also supplied to ensure that the test samples are accurately cut to the required test dimensions.
To conduct a simple test the apparatus is heated to test temperature and the test samples immersed in the temperature bath medium. After 10 seconds they are removed and allowed to cool back to room temperature. A measurement of the sample is taken longitudinal and transverse directions and the percentage shrinkage calculated.
Designed in accordance with the ASTM D2732 international test standard the apparatus is extremely cost effective and very simple to use.

Technical Specification
  • Simple determination of Unrestrained film shrinkage
  • Liquid immersion method
  • Simple to operate
  • PID electronic temperature control
  • Resolution 0.1C
  • PT100 PRT sensor accurate to 0.1C
  • Integrated stirrer motor
  • Electronic timer HR:MIN:SEC
  • Stainless steel liquid bath
  • Sample cutting template 100mm x 100mm
  • 6 off Sample specimen holders (Stainless steel)
  • Product user manual
  • CE declaration certificate

Optional Ancillaries
  • Sample specimen holders (Stainless steel)
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Torsional Stiffness Apparatus

Torsional Stiffness Apparatus

The Torsional Stiffness Apparatus incorporates a torsion head and wire that translate a twisting motion to a 1/2" wide x 4 1/2" long specimen. Mounted to a rigid base and support post, the torsion head includes a dial protractor graduated from 0 to 360. Made of 0.010 inch diameter tempered stainless steel wire, the torsion wire passes through the center of the torsion head in a loosely fitting sleeve gripped by a friction bearing. A fixed index pointer indicates the degrees of twist introduced to the torsion wire.

Specimens are secured to the Torsional Stiffness Apparatus by two clamps. The upper specimen clamp is fastened to the lower end of the torsion wire and is able to rotate as the torsion wire is twisted. The lower specimen clamp holds the specimen in place which allows the twisting action to occur. To accommodate the twisting action, the lower specimen clamp can slide up or down guide posts mounted to the base.

To operate the Torsional Stiffness Apparatus, the torsion head is rotated in a plane normal to the torsion wire. As the torsion head rotates, the torsion wire twists the test specimen. Mounted to the top of the test specimen upper clamp assembly is an indicator that measures the twist applied to the specimen until the specimen has been twisted 90.

An optional Finger Control Knob provides an ergonomic design that allows for two-hand operation of instrument, permitting a smooth twisting action of the specimen.

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melting point apparatus

Melting Point Apparatus
EZ-Melt is a fully automated melting point apparatus that determines the melting points of chemical substances. Its fast, accurate, and very easy to use. You simply enter the start temperature, stop temperature, ramp rate and press Start. Its that simple!
  • Fully automated operation
  • Simultaneous analysis of 3 samples
  • PID-controlled temperature ramping
  • Digital image processing technology
  • Pharmacopeia and GLP compliant
Absolute Value
EZ-Melt is priced far below any other automated system, as well as most manual systems. It provides the absolute best value of any commercially available melting point apparatus.

Automated Operation
Unlike time-consuming manual melting point systems, EZ-Melt is specifically designed for unattended (automated) operation. During a melt, a closed-loop PID algorithm controls temperature ramping, and a built-in digital camera continuously monitors your samples as they melt. Using digital image processing technology, images are analyzed and the melting points (clear point and onset of melt) are determined. Results are read on the large 4-digit LED display.

Temperature Tagging
Samples can be viewed at any time using the built-in magnification lens. During a measurement, you can flag relevant events by pressing the Left, Center or Right front-panel buttons. Up to four individual temperatures can be tagged for each sample.

Precise Temperature Control
The small, aluminum oven design, along with microprocessor-controlled temperature ramping, allows fast and repeatable warm-up and cool-down cycling. Ramp rates from 0.1 C/min. to 20 C/min. (1-2-5 sequence) provide the flexibility needed for virtually any melt.

Accurate Results
EZ-Melt uses a platinum RTD sensor to make temperature measurements to 400 C with 0.1 C resolution. It is easily calibrated in the lab using certified reference standards, and complies with modern Pharmacopeia protocols.

Affordable Precision
EZ-Melt is the fast, accurate and affordable solution to melting point measurements. Dont waste time with a manual system use EZ-Melt!
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Students Melting point system

Students Melting Point System
DigiMelt is a modern, low cost, digital melting point apparatus designed specifically for the student lab. Students learn the visual detection capillary method of melting point determination without the frustration of trying to control the oven temperature. DigiMelt rapidly heats the oven to the programmed start temperature, then ramps at the specified rate. The student carefully observes the samples and records the melting points with a touch of a button.
  • MPA160 Melting Point Apparatus
  • Fast, safe, reliable measurements
  • Mercury free
  • Built-in digital thermometer
  • Microprocessor controlled ramps
  • Ramp rates from 0.5 to 20 C/min
  • Easy to clean and maintain
  • Tube tapper packs samples
  • NRTL safety certified
  • Digital Temperature Readout

DigiMelt incorporates a platinum resistance temperature detector (RTD) instead of the usual mercury thermometer. This means better accuracy on the readings, and no more mercury cleanup from broken thermometers. The RTD is encased inside the oven block making it virtually unbreakable.

Microprocessor Temperature Control
Some student instruments use a large knob that simply throttles power to the oven without any sense of what the target temperature is. DigiMelt uses an RTD for feedback, so it "knows" the oven temperature. This means the students can enter a start temperature, a ramp rate, and a stop temperature and the microprocessor takes care of the rest. Furthermore, the microprocessor can deliver variable amounts of power to the oven, so it can quickly ramp to the starting temperature, then perform the ramp as slowly as 0.5 C/min.

High Quality Optics
Rather than forcing the student to peer through a tiny lens with poor illumination, the DigiMelt uses a large magnifier that allows plenty of eye relief. The user can see all three capillaries easily at a comfortable distance from the instrument. White LEDs are used to provide high-contrast illumination.

Tube Tapper
For many students, the melting point lab is the first time they have touched a capillary. This can lead to lots of capillaries on the floor and many broken capillaries. DigiMelt employs an integral cell phone vibrator motor to let students pack their sample without tapping them on the bench or dropping them through a long glass tube. A molded guide in the chassis allows students to pack three samples at a time.

Easy Maintenance
Cleaning the lens is as simple as removing the lens retaining ring. If a student should break a capillary, the entire lens holder assembly slides out for easy clean up of the broken glass. Replacing thermometers is a thing of the past as the RTD will never break and cannot be removed from the instrument. Unlike conventional incandescent bulbs that must be periodically replaced in some student instruments, the white LEDs used in DigiMelt will last a lifetime.

Safer for Students
The DigiMelt uses an internal RTD thermometer, which means students and TAs are never exposed to toxic mercury vapors. Some student instruments will reach 500 C and stay at that temperature indefinitely a severe burn hazard. The DigiMelts maximum temperature is 260 C, which allows testing of virtually all organic compounds a student might examine. Intelligently designed cowling protects students from touching the hot oven. Furthermore, the oven will automatically turn off after being idle for 30 minutes.
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