CABLE CONSTRUCTION :-

The measurement of temperature is one of the most vital functions in the control of manufacturing and processing operations. As demands for greater quality, reliability and economy increase, the demands for more precise measurement and control increase. Newer and more sophisticated electronic circuitry is employed creating stringent demands on the wire and cable used to sense and transmit temperature measurements. To meet these ever increasing demands Insucon has a full line of Thermocouple Grade Wire and Thermocouple extension wire and Cable. Complementing its line of Electronic instrumentation Cable Insucon now provides the industry with a complete line of wire and cable for manufacturing  and process control, all produced to the highest standards of reliability and safety established by government and industry.

THE THERMOCOUPLE :-

At the heart of all temperature measurements is the thermocouple. Although involving very complex design parameters, the fundamental concept of all thermocouples is the same . Two wires of dissimilar metal are joined together at one end. An increase in temperature creates an electromotive force (emf) or signal, which is transmitted through these wires to a monitoring device which "reads" this signal and displays it on a previously calibrated meter of digital device.

The monitoring device is usually at a location some distance away from the actual thermocouple. To connnect the thermocouple to the monitor requires wire or cable ( for multiple thermocouple installations) that will maintain the integrity of the temperature - emf signal generated by the primary wires in the thermocouple.

CONDUCTOR MATERIALS :-

The range and accuracy of temperature measurement are dependent on the conductor materials employed . Pairs of various metal alloys will react differently with changes in temperature.

Chart No. 1 gives the temperature range and limits of error (tolerance) for the most popular alloy combinations. All Insucon thermocouple wore and cable is tested and calibrate to the standard limits of error as indicated. Where situations require closer tolerances, wire and cable calibrated to the special error limits is available under special order.

LIMITS OF ERROR FOR THERMOCOUPLE GRADE AND EXTENSION WIRE CHART No. 1

INSUCON'S Standard line of thermocouple wire and cable is available in a wide range of insulating and jacketing materials to suit the most demanding environmental conditions.

Chart No. 2 gives the most popular combinations of material and the characteristics of each. Special situations may require other types of materials. INSUCON'S technical service team is available to help in determining the exact choice for your application.

The key to precise temperature measurement is consistency . Establishing very exacting standards of calibration, ANSI, the American National Standards Institute and ISA, Instrument Society of America have been able to govern the specification and manufacture of thermocouple and extension wire and cable . These standards establish quality control techniques and require certification by the manufacturer to ensure performance.

INSUCON provides the entire product line with full compliance to these standards. ANSI colour coding is used throughout enabling positive identification and installation in complete conformance to governing specifications.

ISA / ANSI COLOUR CODE

THERMOCOUPLE WIRE DIAMETER & RESISTANCE
(Ohms per 100 Double Feet @ 20^oC)