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Instrumentation

THERMO COUPLES& RTD SENSORS

Description:

RTD's are high precision device used to measure temperatures in corrosive and non-corrosive media. They work on the principle of variation of resistance of a sensing element, usually made of Platinum, with corresponding change in temperature.
These RTD's are available in following types :
PT 100, PT 130, PT 46, PT 200 ( As Per DIN 43760 OR BS904 CLASS II) Pt 50 (as per JIS) Simplex or Duplex.
Thermocouples:
A thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end which produce a small unique voltage at a given temperature. This voltage is measured and interpreted by a thermocouple thermometer.

 

These Thermocouples are available in Three Types of hot Junctions :

The Grounded Junction
Recommended for the measurement of static or flowing corrosive gas or liquid temperature and for high pressure application. The junctions are welded to the protective sheath giving faster response
An Underground Junction :
Used for measurement in corrosive application where it is desirable to have the thermocouple electronically isolated form and shielded by a seath. The junction is physically isolated from the sheath from MgO powder.
An Exposed Junction :
It is used for the measurement of static or flowing non-corrosive gas temperature where fast response time is required. The junction extends beyond the protective seath to give accurate and fast response. The seath insulation is sealed where the junction extends to prevent penetration or moisture or gas which would cause.

Types of Thermocouples and ranges:

Table

Types of Assemblies available:

Terminal Block Type.
Hand Held Type.
Mineral Insulated Metal Sheeted.
Transition Joint Type.
Quick Disconnect.
Thermocouple with special outer sheaths like silicon Carbide, PTF, PVDF coated etc.

Mountings:

Fixed male threaded, addition, Gland type, Nipple - Union, Nipple assembly or adjustable flanged types, Bayonet type and others.

Insulations:

Multibore ceramic tubing / Magnesium Oxide (MgO filled) / M.I.

Ordering information’s for Thermocouples and RTDs:

Operating Range, RTP Type & Class - K / J / T / E / B / R / S - Simplex / Duplex,
Specify Wire Gauge,
Type of RTD Element & Class
Head Assembly Weatherproof / Ex. Proof, Sheath Material - Length & O.D.,
Extension cable material - It's covering length, Process connection, Wire connection - 2 Wire / 3 Wire / 4 Wire

Mountings:

Fixed male threaded, addition, Gland type, Nipple - Union, Nipple assembly or adjustable flanged types, Bayonet type and others.

Panel Mounting Indicator cum controlers

Application:
Continuous temperature measurement at any one Reactor / Process Vessel in any industry. Available in all standarad in DIN enclosures of all sizes and IP 65 enclosures for clean room applications. Also available in wall mounting housings with big 1" high display size.
SPECIFICATIONS:
Input : RTD Pt - 100, Thermocouples, 'J', 'K' , 'R', 'S' types.
Display : 3 ½ Digit 7 segment. 0.5" High Super Bright Red L.E.D
Display Resolution : +/- 0.1 °C
Accuracy : +/- 0.1 % -50° to 350° 'C (RTD)
Ranges : 0°C - 500° 'C 'J' type Thermocouples 0°C - 1100° 'C 'K' type Thermocouples
Panel Mounting Controllers
Application:

Application: Online continuous temperature measurement and control on any vessel, reactor, point of measurement in any industry including bulk drugs, chemicals, pharmaceuticals, edible oil, rubber and all other process industry. The instrument is factory programmed for any input including RTD Pt - 100, J, K, R , S, T Thermocouples and 4 -20mA input from temperature transmitters. Optional built-in transmitter excitation of 24 volts D.C is also available.

SPECIFICATIONS:
Input : RTD Pt - 100, Thermocouples, 'J', 'K' , 'R', 'S' , 'T', 4-20mA current input types.
Programming : 2 Set limits (High & Low) with independent relays using front panel soft keys.
Display : 4 1/2 Digit Red L.E.D, 7 segment, 0.56" High, Optional backlit dot matrix LCD
Accuracy : +/- 0.1% -50° to 350° C (RTD)
Ranges : 0°C - 500° C 'J' type Thermocouples 0°C - 1100° C 'K' type Thermocouples 4 - 20mA input range front key programmable.
Output : 2 Nos. 6A rated relays with independent NO / CO / NC contacts
Temperature Indicators - (Flameproof Housing) Model TEW-FLP
Specifications

Input : RTD (pt-100), Thermocouples

Range :
For RTD (Pt-100) - 1000C to 199.90C (Resolution 0.10C) for RTD (Pt-100) -1000C to 4000C (Resolution 10C)
For 'J' (Fe-K) 00C to 6000C
For 'K' (Cr-Al) - 00C to 12000C
For 'S' (Pt. Pt-10%Rh) 10000C to 16000C
For 'R' (Pt. Pt-13%Rh) 10000C to 16000C
Indication : 3 1/2 Digit seven segment LED 1/2" & 1" size
Accuracy of Indication : ±0.5% of FSD±1 Digit.
Operating Temperature : 0C to 500C
Supply : 230VAC±10%
Flameproof Housing : As IS : 2148/2004
Degree of Protection : As per IS : 12063/1987

 
   
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