THERMOCOUPLES / CONTROL PANELS

Thermocouple Selection Criteria

Type	Limits of Error	Temperature Range
J (Fe - K)	+/- 2.2 Deg C or +/-0.75%	Upto 750 Deg C
K (Cr - Al)	+/- 2.2 Deg C or +/-0.75%	Upto 1250 Deg C
T (Cu - K)	+/- 1.0 Deg C or +/-0.75%	Upto 350 Deg C
R/S/B (Pt/Pt Rh)	+/- 2.2 Deg C or +/-0.75%	Upto 1850 Deg C
Pt-100	+/- 1.0 Deg C or +/-0.75%	-200 to +600 Deg C

Applications :

1. FOR CERAMIC, GLASS AND REFRACTORY INDUSTRIES
Thermocouples used for High Temperature applications are Pt/Pt Rh type . Pt/Pt Rh 13%, 10%, or 30% can be used depending upon the operating temperatures. German make Recrystallised High Alumina Pythogorous KER - 610, KER - 710, SS 310 or Inconel 600/800 grade tubes are provided as protection sheaths. High Alumina tubes can withstand temperatures upto 1850 Deg C.

2. FOR HEAT TREATMENT FURNACE
Heavy duty K (Cr/Al)Type Thermocouples are used with outer SS310, Inconel 600 , Incolley 800 or Ceramic KER-610 tubes as protection sheaths. This sheathings posses good resistance to oxidation at higher temperature. Simplex or Duplex with straight or L type are available. Mineral Insulated Thermocouples with outer SS 316 or Inconel 600 grade sheath (Simplex and Duplex) in diameters 1.0mm , 1.5mm , 3.00mm , 4.5mm , 6.00mm , 8.00mm are also offered. Thermocouples with Single or Multibore Insulators and junction block are used in laboratory applications for air temperatures. Handheld Thermocouples connected to Portable indicators can be offered for sensing the temperatures of metal surfaces.

3. CEMENT , CHEMICAL , FERTILISER INDUSTRIES
Thermocouples and RTDs are used as per the requirements. Different sheath materials are used depending on the application.

THERMOCOUPLES WIRES & CABLES
Compensating Cables
Compensating cables in K, J, R, S type are available in different insulating materials like PVC, Asbestos, Fiberglass, Teflon , SS braiding.

4. POWER REGULATORS CONTROL PANEL
SCR controlled Power Regulators with time profile supervisory control unit or Multiple Ramp/Soak, Multiple Program, Multiple/Single input programmable PID controllers with PC based RS 485 interface connection for controlling furnace temperatures or any other process.

DIGITAL TEMPERATURE INDICATOR / CONTROLLERS
Types: S/R (Pt/Pt Rh), K (Cr/Al) , J (Fe/K) , Pt - 100 .
Temperature Range: 0 to 1800 ,0 to 1200 ,0 to 600 ,-250 to +400 Deg C. Digital temperature indicators are used to indicate the process temperature and controllers are used to control the process temperature with indication. Temperature controllers can be offered with single or two set points. Multi channel Temperature indicators with 2, 3, 6, 8, 12 channels can be offered. Portable battery operated Handheld temperature indicators are available up to 1200 Deg C.

Digital PID controllers with autotune, fuzzylogic, multi program, multiple ramp / soak, cooling cycle, universal input, relay, SSR, (4-20) mA, triac outputs are available. (Both Indian and Imported makes)

5. TEMPERATURE TRANSMITTERS
Transmitters provide high isolation between input and outpots, thus gives excellent stability and trouble free opeartion. Also, current being less succeptible to industrial RFI/EMI and ground loop interference, transmitters are being used in every process control application. They are available in head mounted or DIN rail mounted cersions.