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22A Gel Time Meter

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The gelation point is usually characterized by a sudden, pronounced increase in material viscosity
The determination of the gelation point for thermosetting compounds is critical in evaluating the rate of polymerization for materials such as resins, waxes, varnishes, styrenes, monomers, potting compounds, melamine, formaldehydes, unsaturated oils, thermosetting foodstuffs, and other polymerizable materials. The gelation point is usually characterized by a sudden, pronounced increase in material viscosity (thickness).

The gelation point can help determine shelf life of a substance by plotting the log of gel time vs.1/t (absolute temperature). Simply determine gel times at two or more elevated temperatures and extrapolate to ambient. The points should fall into a straight line. A Gel Time meter provides a highly reliable means for measuring the gel time defined as the time for the material under test to reach the incipient gelled state at a constantly, controlled temperature.

Model 2295A Digital Temperature Controller
The Model 2295A provides the ultimate in safe, automatic, variable temperature control. It is the ideal way to provide temperature bath control for gel time testing. Simply set the front panel to the desired set point (up to 315¡Æ C) and the 2259A maintains precise temperature regulation to within ¡¾ 0.2¡Æ C after temperature stabilization.
 
Features
  • Ideal for production, quality control and research work
  • Simple, Intuitive operation
  • Determine precise gelation point for thermosetting compounds
  • Reproducible results within ¡¾1%
  • Automatic shut-off at Gel Point for error-free testing
  • Audible and visual indication at gel point
  • Self-indicating to nearest second
  • Fully automatic temperature controler available (Model 2295A)
  • Portable Design: Compact and lightweight
 
ApplicationsGel Time Meter and Components
  • A typical system used to measure the gelation point consists of the following items:
  • The test sample is placed into a test tube and immersed within a constant temperature bath
  • A rotating glass rod spindle is placed into the sample
  • The glass rod is attached to a torsion wire being driven by a synchronous motor rotating at 1 rpm
  • Timing commences and the Gel time meter monitors the test until the gel point has been reached
  • The Gel Time is displayed and a beeper and indicator light provide audible and visual indication of the gel time being reached
 
SPECIFICATIONS

Model 2295A Temperature Controller

Display   4 1/2 digit LED 1/2" high
Temperature Range  32 to 1,562¡Æ F (0 to 850¡Æ C)
Accuracy / Resolution ¡¾ 1¡Æ C (0 to 325¡Æ C) / 0.1¡Æ for Centigrade scale
Input Sensor Type  K Type Thermocouple
Power   120 VAC, 50/60 Hz

CAT NO. MODEL DEscRIPTION AVAIL PRICE 
22A   22A   Gel Time Meter, 120V/60Hz   Yes   3,013,200 
22A/50   22A/50   Gel Time Meter, 120V/50Hz   Yes   3,013,200 
22A-240   22A-240   Gel Time Meter, 240V60Hz   Yes   3,445,200
22A-240/50   22A-240/50   Gel Time Meter, 240V/50Hz   Yes   3,445,200 
2295A   WD-68900-01   Digital Temperature Controller   Yes   1,501,200
2296   2296   Thermocouple Type K with 5 Foot Coil Cord   Yes   270,000
22A Kit A   22A Kit A   Start up Kit   Yes   Call 031-777-1588
(12) Test Tubes (2232-5),(12) Stirring Rods (2242-1), (12) Plastic Sleeves,large & small 2242-2), (12) Allen Set Screws (2242-5), (1) Allen Wrench Small, (0.035¡±)(2232-31)