Rjak Corporation

Thermocouples are widely used in measurement & control the temperature. Thermocouple have a general specification & used with/ without mounting system, the size & length of Thermocouples depend on their application. There are several different recognized Thermocouples. Type available each type has different useful temperature ranges as well as different application.

Type of Thermocouple –

NOBLE METAL THERMOCOUPLE - These type of Thermocouple are manufactured with Precious or noble metals such as-

(Platinum/13%Rhodium – Pure Platinum) Type “R” – used up to 1450 dig.C 
(Platinum/10%Rhodium – Pure Platinum) Type “S” – used up to 1450 dig.C 
(Platinum/30%Rhodium – Platinum/6%Rhodium) Type “B” – used up to 1750 dig.C 

These Thermocouples protected by ceramic 610 tubes / ceramic 710 tubes.
These Thermocouples are usually FRAGILE.

BASE METAL THERMOCOUPLE -

These type of Thermocouples are manufactured with Inexpensive metals such as-
(Ni Cr-Ni) Type “K” - used up to 1200 dig.C temperature.
(Fe-Ko) Type “J”- used up to 750 dig.C temperature.

Thermocouple is protected with metallic tube/ drilled bar made of SS 304, SS 316, SS 310 HRS 446 & inconal 600 in different diameter.

MINERAL INSULATED THERMOCOUPLE - These type of Thermocouples are manufactured with common   Inexpensive metals such as-
(Ni Cr-Ni) Type “K” - used up to 1200 dig.C temperature.
(Fe-Ko) Type “J”- used up to 750 dig.C temperature.
These Thermocouples are protected with seamless metallic tube of SS 304, SS 316, SS 310
inconal 600 in range of  1.5 mm 4.5mm 6mm & 8mm diameter . The Thermocouple element
is insulated from the metal sheath by a compacted MAGNESIUM OXIDE [MGO] power

Digital Temperature indicator & Controllor: - 

The Thermocouples / RTD Sensors should be connected to the instruments by proper cable minimize error due to cable resistance, for thermocouple sensors; compensating cable of proper type must be used.

Input Sensor Specification #Thermocouple  # RTDs	:	Iron- Constant (Fe/Con)- up to 400 C Comel – Almelo (Cr/Al)-up 1200 C Platinum-platinum Rhodium (pt/pt-rh-13%) upto1600 C Platinum – platinum –Rhodium (pt/pt –rh-13%) upto1600 C Resistance Temperature Detector (pt-100)up to 600C
Indication Accuracy	:	1%or  2 C of FSC
Compensation	:	Cold junction compensating automatic For all thermocouples types.
Really Status	:	Relay energized for heating (OR Coo-Ling) Operation.
Really Output	:	One change over relay contact 5A/230V AC  rating
Control   Action	:	On –OFF or time proportional
Control Version	:	Single set point & Dual set point
Sensor Break Portion	:	Relay turn off in case of sensor break
Power Supply	:	230V  Ac15%,50 Hz
Indication	:	Main ON, Relay ON and thermocouple break
Display	:	RED 3 Digit, 3/4” height
Application	:	All type of industries there is require only Display Temperatuure
Panel Mounting size in mm	:	96x96          72x72    48x96    172x72
Panel Cutout size in mm	:	92x92    68x68    44x92    168x68

Compensating  Thermocouple Cable : 

Compensating cable are used as connection lead From the Probe (Thermocouple) to the measuring Instrument (Temperature Indicator) . These cables incorporate different alloys which give the same emf output (With in a limited temperature range)  as those in the thermocouple.

       There for it is essential that a cable is used which has the same emf output as
       The Thermocouple; otherwise spurious emf is generated at these junction. Compensating. Cable provides convenient, economic solution with in probe & indicator. Compensating Cable is require as per type (J/K/R/S/RTD) of Thermocouple. 

       Compensating cable has two cores (positive & negative) each core has different colour code for reorganisation of the polarity, Compensating Cables are insulated by PVC/ PVC, fibreglass/fibreglass, Fibreglass/fibreglass/SS, Fibreglass/fibreglass/asbestos having different conductor size Like 3/24 SWG, 3/26 SWG, 7/26 SWG, 7/36 SWG

INFRA RED SENSORS:

Imported Non-Contact Infrared Thermometer with laser Select key & LCD display. With range -50dig.C to 550dig.C / 0dig.C to 1500dig.C