Thermocouple Probe
Todays deals on Thermocouple Probe?
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Omega DP462 Temperature Controller Thermocouple Meter w/ Probe & Manual $279.99 |
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EDL Pocket-Probe Digital Thermocouple and Sensors $249.00 |
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T1 LINE Seiki Thermocouple Probes–KF02A $220.00 |
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T1 LINE Seiki Thermocouple Probes–KF01A $210.00 |
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T1 LINE Seiki Thermocouple Probes–KF02A $200.00 |
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Fluke 51 II 2 60Hz Digital Handheld Thermocouple Thermometer w/ Type K Probe NEW $195.00 |
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T1 LINE Seiki Thermocouple Probes–KF01A $190.00 |
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NEW OMEGA XMO-W5R26-U-062-36-H-SX-6 EXOTIC THERMOCOUPLE PROBE TYPE SXH HIGH TEMP $189.99 |
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T1 LINE Seiki Thermocouple Probes–KS21A $170.00 |
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RTW Pt100 Ohm Titanium Temperature Probe/Sensor/Thermocouple, New $176.40 |
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T1 LINE Seiki Thermocouple Probes–KB66A $160.00 |
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T1 LINE Seiki Thermocouple Probes–KS21A $150.00 |
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T1 LINE Seiki Thermocouple Probes–KB66A $140.00 |
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Used HOZAN DT-510 Digital Thermometer With Surface K thermocouple Probe $149.99 |
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Exergen IRt/c-K-240F/120C Non-Contact Infrared Temperature Probe Thermocouple K $125.00 |
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FLUKE 87 True RMS Digital Multimeter w/ 80TK Thermocouple Module & 80i-400 Probe $104.49 |
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K Type Surface Thermocouple Probe With Extendable Cord $122.99 |
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lot of two OMEGA THERMOCOUPLE Probes $99.00 |
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OMEGA BS5001T3 TEMPERATURE CONTROLLER, THERMOCOUPLE CONTROL, T/TC PROBE, -85 to $115.00 |
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PYROSALES INDUSTRIAL THERMOCOUPLE RTD PT100 (BRAND NEW) $53.74 |
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Cooper Atkins Thermocouple FW2000MK $99.99 |
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NEW Omega BT-000-J-4-48-2 Thermocouple 3″ Probe 56″ $99.00 |
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NEW VERTEQ THERMOCOUPLE PROBE 1054629 1 $99.99 |
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type K Thermocouple Probes in thermal wells LAM #666-0 $109.99 |
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Omega DP119-KC2 Thermocouple Panel Thermometer $99.00 |
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Dickson SM150 Thermocouple Probe Temp. Data *GOOD WORKING & CALIBRATED* $60.00 |
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NIB Fluke 80PK-7 Type K Thermocouple Industrial/High Temperature Surface Probe $89.00 |
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Thermocouple Temperature Probe Kit for Middleby PS314SBI, PS360EWB 33984 $86.00 |
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Thermocouple Temperature Probe Kit for 250,300, and 360 Ovens- part number 33984 $86.00 |
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Thermocouple Temperature Probe Kit for Middleby PS536GS 33984 $86.00 |
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Thermocouple Temperature Probe Kit for Middleby BE2136, BG2136 $86.00 |
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Thermocouple Temperature Probe Kit for Middleby PS570G 33984 $86.00 |
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Thermocouple Temperature Probe Kit for Middleby PS555 33984 $86.00 |
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NEW OMEGA THERMOCOUPLE PROBE WITH HANDLE AND CABLE $79.99 |
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K Probe Thermocouple Meter Thermometer Dual Input LCD $89.95 |
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RTW Pt100 Ohm Titanium Temperature Probe/Sensor/Thermocouple/Thermowell $88.20 |
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K Thermocouple Sensor Probe=45cm 6.4φ 1200℃ L=3m Insula $71.50 |
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(4) NEW Omega Heavy Duty TJ Probe Type J Thermocouple 1/4” O.D. $79.95 |
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Cooper Atkins Thermocouple 386 model # 38653-K thermometer.with probe. (#2) $75.00 |
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COLE PARMER DIGI- SENSE THERMOMETER MODEL 91100-10 TYPE K THERMOCOUPLE $75.00 |
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Mastech MY64 Multimeter with Test Leads Thermocouple Probes Professional Meter $69.00 |
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BARNANT 100 THERMOCOUPLE THERMOMETER 600-2820 3 PROBES $79.00 |
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PYROMATION SURFACE THERMOCOUPLE TEMPERATURE PROBE J14C-9-25-06-9E06-K $70.00 |
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Cooper Atkins Thermocouple series 386 thermometer.with probe (#3) $65.00 |
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K Thermocouple Temperature Sensor Probe=30cm 6.4φ 1200C $62.50 |
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NEW Surface Temperature Probe Type K Thermocouple Sensor Thermometer Tool kit $59.99 |
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Atkins 39658-k Thermocouple Thermometer w/ Probe in Nice Leather Case. Works!! $65.00 |
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Lot (5) Conax Buffalo Thermocouple Probe Cable Assy NEW $59.99 |
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K Thermocouple Sensor Probe=20cm 6.4φ 1200℃ L=3m Insula $58.20 |
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Dickson SM150 Thermocouple Probe Temp. Data Logger NR $67.99 |
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NEW 8″ TEMPERATURE PROBE WITH TYPE K THERMOCOUPLE CONNECTOR AND WIRE $67.99 |
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Pyromation J Type Thermocouple Probe 440-385U-S 100deg $65.00 |
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Stainless Steel Type K 7.3″ Liquid or Air Immersion Thermocouple Probe NEW $63.75 |
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NEW CONSUTECH SYSTEMS LLC THERMOCOUPLE 12″ LONG TYPE J (S17A) $50.00 |
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Marchi Associates Thermocouple Probe P/N SDSM-835 (New) $49.00 |
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Cole Parmer Air Gas Thermocouple Probe 08517-75 $49.99 |
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Omega Heavy Duty Transistion Joint Thermocouple Probe TJ72-CASS-116U-6-CC-SMPW-M $55.00 |
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DME AFTC-204-2 Probe Heater W/ Thermocouple NEW $41.60 |
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K Type Thermocouple Temperature Sensor Probe Cable Test $50.00 |
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K Type Thermocouple Temperature Sensor Probe Cable Test $50.00 |
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Cable Cut For Spare Parts FLUKE 80PK-8 Pipe Clamp Temperature Thermocouple Probe $49.99 |
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K Probe Thermocouple Meter Thermometer Single Input LCD $49.95 |
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k-Type Thermometer w One Thermocouple and Stainles Temperature Sensor Probe TC-3 $48.98 |
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Pyromation, Inc. 401-185-1800F Temperature Transmitter and Probe/Thermocouple $48.60 |
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Lot of (5) GIC Thermodynamics 19952 Thermocouple/Temperature Probes/Sensors, New $48.60 |
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Bang & Olufsen B&O temperature probe PT6 thermocouple test and manual $29.00 |
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Surface Piercing Temperature Probe Thermocouple U Type $39.99 |
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EWF1063.22/1UUA L100 Titanium Temperature Sensor/Probe/Thermocouple, New/Unused $45.90 |
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Omega Engineering Thermocouple Probe $45.00 |
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Atotech 08588907 38″ Stainless Steel Temperature Probe/Sensor/Thermocouple, New $45.00 |
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Type K Temperature Probe Thermocouple 750°C $28.99 |
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OMEGA TYPE K THERMOCOUPLE $35.00 |
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UEI ATT30 J-Type 8in Liquid Probe Thermocouple with Han $35.50 |
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Digital PID Temperature controller + 25A SSR + K thermocouple probe $10.00 |
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Immersion Thermocouple P/N KK316G-304-SS 1/4-4-OL $32.95 |
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Watlow Armored “J” Thermocouple Probe 81DJCGB072B NEW $40.00 |
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K-Type Surface Thermocouple Probe Temperature Sensor Digital LCD Thermometer $39.99 |
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Scientific Digital Thermometer 1 K Type & Thermocouple Temperature Sensor Probe $39.99 |
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Omega Engineering Thermocouple Probe Large $39.99 |
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Omega Engineering Thermocouple Probe Small $39.99 |
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5 packs NEW Fluke Y 8114 Thermocouple Connectors $39.99 |
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NEW DTC Platinum Thermocouples Terminal Bulb Probe Type K 9.5 1000 $39.99 |
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K-Type Surface Thermocouple Probe Temperature Angled 932F f. Digital Thermometer $39.99 |
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Lot of 10 Female Type K Watlow Thermocouple Connectors Standard Jack SCF-K-WAT $39.95 |
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New K-Type Thermocouple Probes and Handle $31.35 |
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GEFRAN Thermocouple Sensor Probe TR1-A-2-B-5-A-F $39.00 |
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Omega TJ144-CAXL-18U-2-CC-XCIB Thermocouple Sensor Cable Thermistor Probe New $35.00 |
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TENMA 72-8360 AIR/GAS TEMPERATURE SENSOR TYPE K THERMOCOUPLE PROBE $35.00 |
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JMS S.D. Temperature Probe Thermocouple 12/04/00 $33.00 |
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Digital PID Temperature Controller with K-type thermocouple probe $17.99 |
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Digital PID Temperature Controller + K thermocouple probe $17.99 |
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Fluke 80PK-1 Beaded K-Type Thermocouple Probe $32.88 |
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resistor thermocouple lead spool an-5534-1 new $19.99 |
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More Shine Pt100 Ohm SS Temperature Probe/Sensor/Thermocouple, Stainless Steel $32.40 |
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Omega Super OMEGACLAD XL Heavy Duty Transition Junction Thermocouple Probe TJ36 $24.99 |
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Type K thermocouple $29.00 |
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COLEPARMER WU-08505-55 TYPE J SMALL DIAMETER STD.THERMOCOUPLE PROBE 4″L NEW $23.99 |
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New Nickerson Machinery B512 Thermocouple 5mm Dia Probe $27.50 |
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No Name T123HT-BJA Thermocouple Type J 90° T123HTBJA $27.50 |
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OMEGA THERMOCOUPLE, 1/8″ X 5 1/2″ PROBE $19.99 |
Thermocouple Probe Questions
COMPENSATING CABLES & EXTENSION LEADS FOR THERMOCOUPLE & RTDs
Introduction : It is often desirable to connect a thermocouple probe, as a part of a very long circuit from the sensor itself to a remote reference unit and/or measuring instrument. Yet, we would avoid the expense of high specification thermocouple cable on a long run. Connecting cheaper cable would be ideal but we need to do so without having to take particular care that temperature where the connection is made is known and taken in to account.
When connecting thermocouples to instruments, it is essential that a cable is used, which has the same emf output as the thermocouple; otherwise spurious emf is generated at these junctions. The best solution is to use the same material as the thermocouple (extension cable). The tolerances for these are listed in the following tables.
A cheaper alternative is to use compensating cables, the alloys of which are different from those of the thermocouple but have the same output over a limited temperature range.
Compensating and extension grades of wire are supplied in the bright-annealed condition.
For this to be possible, the thermo electrics properties of the additional conductor must not differ too much from those of the thermocouple itself. Extension and compensating cable provide convenient, economic solution-each with its pros and cons.
Extension cable uses wire of nominally the same conductor as the thermocouple itself, which thus inherently possess similar thermo power characteristics, and with no connection problems.
Miss-match error arising from high connecting box temperature is likely to be relatively small. These cable are less costly then thermocouple wire, although not cheap, and are usually produced in a convenient form for carrying over long distance typically as flexible wiring or multi-core cables. They are recommended for best accuracy.
Compensating cables, on the other hand are less precise, but cheaper. They harness quite different relatively low cost alloy conductor materials, whose net thermocouple in question, but which not them as faithfully as do extension cable. Thus, the combination develops similar output as those of the thermocouple, but the operating temperature range has to be restricted to keep miss-match error acceptably small.
TECHNICAL CONCEPT:-
The thermocouple wires, made of different metals or alloys A and B, are joined together at one end H, called the hot (or measuring) junction, at a temperature T1.The other ends, CA and CB (the cold or reference junctions), are maintained at a constant reference temperature T0, usually but not necessarily 32°F (0°C).From the cold junctions, wires, usually of copper, lead to a voltmeter V at room temperature Tr.Due to the thermoelectric potential gradients being different along the wires A and B, there exists a potential difference between CA and CB.This can be measured by the voltmeter, provided that CA and CB are at the same temperature and that the lead wires between CA and V and CB and V are identical (or that V is at the temperature T0, which is unusual).Such a thermocouple will produce a thermoelectric emf between CA and CB which depends only upon the temperature difference T1 – T0.
Thermocouple(Type designation) Materials
B Platinum-30% rhodium/platinum-6% rhodium
E Nickel-chromium alloy/a copper-nickel alloy
J Iron/another slightly different copper-nickel alloy
K Nickel-chromium alloy/nickel-aluminum alloy
R Platinum-13% rhodium/platinum
S Platinum-10% rhodium/platinum
T Copper/a copper-nickel alloy
INSULATION:-
Insulation used in cable is:
• PVC
• TEFLON
• GLASS FIBER
• Silicone rubber: -
• Fire resistance mica cable: -
• PVC:
It is cheaper then other; it is used for the temperature range 30°C to 105°C. It is available in twisted, flat, &multi pair combination. There is arrangement of options-with ripcord, PVC sheathed, screened, with a copper wire drain, or steel wire armoured construction-the conductor itself being solid or stranded.
• TEFLON:
It is used for high temperature range 273°C to 250°C, or 300°C for short period. It is available in twisted, flat, & multi pair combination, but not steel wire armoured versions. It withstands attack from virtually all known chemicals, oils & fluids. All over the cable is made in extruded form and is therefore gas, steam & water tight which makes them most suitable for application such as autoclaves or sterilizers.
• Glass fiber:
It is used for higher temperature range. It handles up to 50°C to 400°C, in some cases it is used up to 800°C. Single and multi-pair varieties are available in flat and twisted with many of the options. Ceramic fiber cable are used up to 1400°C which are suitable for use at normal air ambient temperature where there is a possibility of a hot spot, which might damage lower rated cables as PVC.
• Silicon rubber:
Excellent properties for the propagation of flame by in corporation of flame retardant silicon rubber compounds. Suitable for situations where there is a risk of fire. Ideal for application where, for short period of time, the temperature can fluctuate, which would cause other cable to become inflexible and brittle.
• Fire resistance mica cable:
Resistance to a temperature of 750°C for at least three hours in accordance with the flame test requirement. Essential for situations where it is of strategic importance to ensure that the cable continues to function during a major crisis-involving fire. The cable incorporates a high temperature rated MICA glass tape with a XLPE insulation on the cores and low smoke and fume material on the bedding and/ or outer sheath.Sheath material used is halogen free.
• Color-coding &specification:
Extension lead & compensating cable are distinguished by color code and letters, to ease identification of the whole circuit. Although the code used to be different from country to country, standard color has been adopted for all standard thermocouple.
B S 4937 part 30(1993) provides standards of coding. In this there is no difference between extension & compensating cable-color codes. With compensating cable, the different alloy used is distinguished by KCA & KCB.
• Armoured flame retardant PVC:
Armoured flame retardant PVC is extremely useful where there is a need to run a number of thermocouple signals back to instrument. All cable incorporate insulated cores, bedding and overall sheath in flame retardant PVC, which has good properties for the reduced propagation of flame. The mechanical properties of these cables meet the requirement of BS EN 60811:1995.
• Non-Armoured flame retardant PVC:
Non Armoured flame retardant PVC is extremely useful where there is a need to run a number of thermocouple signals back to instrument. All cable incorporate insulated cores, bedding and overall sheath in flame retardant PVC, which has good properties for the reduced propagation of flame. The mechanical properties of these cables meet the requirement of BS EN 60811:1995.
RTD Cable:-
RTD Cable are used to carry the RTD signals to the control room or field mounted instruments.they will be in three wire four wire for simplex and ; six and eight wire for duplex
RTD.The conductor normally used for RTD cable is Nickle Plated Copper (NPC) or Silver Plated Copper (SPC) or Bare Copper (BC).
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