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TEMPERATURE ELEMENTS Thermocouples / RTD Assemblies.
Skin Thermocoples
  • The Skin Thermocouples is Designed to Sense Surface Temperature of Boiler or Process Tubes.

  • Typical Skin Thermocouple Assembly comprises of MI Thermocouple, welding pad and strap, intermediate loop (twice pipe diameter), adjustable threaded adapter and heavy duty enclosure.
ELEMENTS K, Simplex or Duplex
SHEATH SS 310, 446, *INCONEL 600, *INCOLOY 800/825 OD 6 mm to 12.7 mm
JUNCTION GROUNDED or UN-GROUNDED
PAD SIZE 2" x 1/2" x 1/4" ; 1" x 1" x 3/4"
Shaped to match pipe curvature
CLAMP / STRAP 1 1/2" x 1/2" x 1/8"
For anchoring Thermocouple
MOUNTING Standard 1" NPT in SS 316
ENCLOSURE Die Cast Aluminium, Cast Steel with Compression Fitting for gripping Thermocouple
  • Thermocouple Junction is welded in the centre of pad
  • Thermocouple is inserted in the pad
    SKIN RTDs (MI) also could be offered on specific requirement.

    *     Manufacturers' Trade Name
Limits of Error for Thermocoupls
THERMOCOUPLE
TYPE 		TEMPERATURE
RANGE °C		 STANDARD
Whichevere is Greater		 SPECIAL
Whichever is Greater
T 0-350 ± 1°C or ± 0.75% ± 0.5°C or ± 0.4%
J 0-750 ± 2.2°C or ± 0.75% ± 1.1°C or ± 0.4%
E 0-900 ± 1.7°C or ± 0.5% ± 1°C or ± 0.4%
K 0-1250 ± 2.2°C or ± 0.75% ± 1.1°C or ± 0.4%
R or S 0-1450 ± 1.5°C or ± 0.25% ± 0.6°C or ± 0.1%
B 800-1700 ± 0.5% ---
   
Reference junction 0°C. As per ANSI MC 96.1 (1982)

Limits of Error for Platinum-RTD Elements
MEASURING
TEMPERATURE
°C		 PERMISSIBLE DEVIATIONS
CLASS A CLASS B
°C °C
-200 ± 0.24 ± 0.55 ± 0.56 ± 1.3
-100 ± 0.14 ± 0.35 ± 0.32 ± 0.8
0 ± 0.06 ± 0.15 ± 0.12 ± 0.3
100 ± 0.13 ± 0.35 ± 0.30 ± 0.8
200 ± 0.20 ± 0.55 ± 0.48 ± 1.3
300 ± 0.27 ± 0.75 ± 0.64 ± 1.8
400 ± 0.33 ± 0.95 ± 0.79 ± 2.3
500 ± 0.38 ± 1.15 ± 0.93 ± 2.8
600 ± 0.43 ± 1.35 ± 1.06 ± 3.3
    As per DIN 43760, BS 1904
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