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THERMOCOUPLES and RTD's
Product Index
Product
 
Page
Bayonet Thermocouple
2
Fixed Length Bayonet Thermocouple
3
Compression Fitting Thermocouple
4
General Purpose Thermocouple
5
Melt Extruder Thermocouple
6
Extension Cables
7
Connectors and Accessories
8
MgO Bendable Thermocouples
9
Extension Wire
 
10
RTDs
11
Portable Thermocouples
12
Digital Thermometers
13



W. H. COOKE & CO. Phone: 717-630-2222 Page 2
BAYONET TYPE
For Use To 800°F.

WITH ADJUSTABLE LENGTH SPRING
Cuts inventory cost. Fits hole depths from 1" to 14".
Bayonet cap turns to desired immersion length.
Flexible. Bends to any angle.

TERMINATION STYLE
Catalog Number Termination Style
L08-1 1
L08-2 2
L08-3 3
THERMOCOUPLE
1
2
STAINLESS STEEL
OVERBRAID WIRE
3

HOW TO ORDER:
1. Specify catalog number
2. Specify "B" length
3. Specify "J or "K" calibration
4. For dual element add suffix "D" to catalog number

Order Example: L08-1-J B=4'

WITH ADJUSTABLE LENGTH FLEX HOSE
Same advantages as above but not as flexible.
Bayonet cap turns over entire length.
Not as much spring tension as spring type above.

TERMINATION STYLE
Catalog Number Termination Style
L08-14 1
L08-15 2
L08-16 3
THERMOCOUPLE
1
2
STAINLESS STEEL FLEX
HOSE ACTS AS A SPRING
3
NOTE: Construction: 304 S. S. flex hose and tubing, 20 gauge fiberglass
insulated stranded wire. See page 8 for Bayonet Adaptors.

HOW TO ORDER:
1. Specify catalog number
2. Specify "B" length
3. Specify "J or "K" calibration
4. For dual element add suffix "D" to catalog number

Order Example: L08-15-J-D B=5'

W. H. COOKE & CO. Phone: 717-630-2222 Page 3
BAYONET TYPE
For Use To 800°F.

WITH FIXED LENGTH
THERMOCOUPLE TERMINATION STYLE
Straight
Catalog Number Termination Style
L08-4 1
L08-7 2
L08-10 3

1
45° Bend
Catalog Number Termination Style
L08-5 1
L08-8 2
L08-11 3

2
90° Bend
Catalog Number Termination Style
L08-6 1
L08-9 2
L08-12 3
3


NOTE: Construction: 304 S. S. flex hose and tubing, spring, 20 gauge fiberglass insulated stranded wire. Adaptors are not furnished with thermocouples and must be ordered separately. See page 8.

HOW TO ORDER:
1. Specify catalog number
2. Specify "A" length
3. Specify "B" length
4. Specify "J or "K" calibration
5. For dual element add suffix "D" to catalog number

Order Example: L08-9-J-D A=2" B=4'


Selection of adaptor and hole depth "C" determines the required "A" dimension. See chart at right.

SELECTION TABLE FOR "A" DIMENSION OF
FIXED LENGTH BAYONET TYPE THERMOCOUPLE
"C" Hole Depth In Inches "A" Dimension Inches
7/8" Long Adaptor 1 3/8" Long Adaptor 2 1/2" Long Adaptor
1/4 to 1/2 1 5/8 2 3 1/8
1/2 to 1 2 2 1/2 3 5/8
1 to 1 1/2 2 1/2 3 4 1/8
1 1/2 to 2 3 3 1/2 4 5/8
2 to 2 1/2 3 1/2 4 5 1/8
2 1/2 to 3 4 4 1/2 5 5/8
3 to 3 1/2 4 1/2 5 6 1/8
3 1/2 to 4 5 5 1/2 6 5/8
4 to 4 1/2 5 1/2 6 7 1/8
4 1/2 to 5 6 6 1/2 7 5/8
5 to 5 1/2 6 1/2 7 8 1/8
5 1/2 to 6 7 7 1/2 8 5/8
6 to 6 1/2 7 1/2 8 9 1/8
W. H. COOKE & CO. Phone: 717-630-2222 Page 4
ADJUSTABLE COMPRESSION FITTING
For Use To 800°F.

THERMOCOUPLE TERMINATION STYLE
Straight
Catalog Number Termination Style
L18-1 1
L18-4 2
L18-7 3

1
45° Bend
Catalog Number Termination Style
L18-2 1
L18-5 2
L18-8 3

2
90° Bend
Catalog Number Termination Style
L18-3 1
L18-6 2
L18-9 3
3

NOTE: Construction: 304 S. S. hose and tubing, 20 gauge fiberglass insulated stranded wire.  A brass compression fitting with 1/8" NPT is furnished with each thermocouple.  See page 8 for S. S. fittings.

HOW TO ORDER:
1. Specify catalog number.
2. Specify "B" length.
3. Specify "J or "K" calibration.
4. For dual element add suffix "D" to catalog number.

Order Example: L18-2-J-D A=2" B=4'


NOT-IN-MELT TYPE
THERMOCOUPLE

Catalog Number Termination Style
L48-1 1
L48-2 2
L48-3 3

HOW TO ORDER:
1. Specify catalog number.
2. Specify "B" length.
3. Specify "J or "K" calibration.

Order Example: L48-1-J B=4'
1
2
STAINLESS STEEL
OVERBRAID WIRE		 3
W. H. COOKE & CO. Phone: 717-630-2222 Page 5
GENERAL PURPOSE THERMOCOUPLE
For Use To 900°F.
Catalog Number
Type
L18-38 Iron-Constantan
Max Temp. 900°F
L18-38-SS Iron-Constantan
Max Temp. 900°F

Stainless steel 3/16"
O. D. tip with 20 ga. fiberglass covered wires.

Stainless steel 3/6"
O. D. tip with 20 ga. F/G S. S. overbraid covered wires.

HOW TO ORDER:
1. Specify catalog number.
2. Specify "A" length.
3. Specify "B" length.
Order Example: L18-38 A=4" B=5'


SURFACE THERMOCOUPLE
For Use To 800°F.

Catalog Number Termination Style
15/32 Dia. 7/32 For #10 Screw
L58-1 L58-17 1
L58-2 L58-18 2
L58-3 L58-19 3

HOW TO ORDER:
1. Indicate catalog number
2. Specify "B" length
3. Specify "J or "K" calibration

Order Example: L58-1-J B=4'
THERMOCOUPLE TERMINATION STYLE


1


2
STAINLESS STEEL
OVERBRAID WIRE		 3


STICK-ON TYPE
THERMOCOUPLE
For Use To 400°F.

Catalog Number Termination Style
L-PSA-1 1
L-PSA-2 2
L-PSA-3 3

HOW TO ORDER:
1. Specify catalog number.
2. Specify "B" length
3. Specify "J or "K" calibration.

Order Example: L-PSA-1-J B=4'
THERMOCOUPLE TERMINATION STYLE

1



2
Butt welded tip covered on both sides with 1" square silicone pressure sensitive adhesive. 3
NOTE:  Available in Type "T" calibration by special order.  Connectors shown are "mini" style.  Standard connectors available on request.    
W. H. COOKE & CO. Phone: 717-630-2222 Page 6
PLASTICS MELT EXTRUDER TYPE
For Use To 800°F.
WITH RIGID PLUG EXTENSION

SINGLE ELEMENT DUAL ELEMENT
Catalog Number "A" "L"
L28-1 Flush 3"
L28-2 1/4" 3"
L28-3 1/2" 3"
L28-4 3/4" 3"
L28-5 1" 3"
L28-6 Flush 6"
L28-7 1/4" 6"
L28-8 1/2" 6"
L28-9 3/4" 6"
L28-10 1" 6"
Catalog Number "A" "L"
L28-11 Flush 3"
L28-12 1/4" 3"
L28-13 1/2" 3"
L28-14 3/4" 3"
L28-15 1" 3"
L28-16 Flush 6"
L28-17 1/4" 6"
L28-18 1/2" 6"
L28-19 3/4" 6"
L28-20 1" 6"

WITH FLEXIBLE HOSE TO PLUG EXTENSION

SINGLE ELEMENT DUAL ELEMENT
Catalog Number "A" "L"
L28-21 Flush 3"
L28-22 1/4" 3"
L28-23 1/2" 3"
L28-24 3/4" 3"
L28-25 1" 3"
L28-26 Flush 6"
L28-27 1/4" 6"
L28-28 1/2" 6"
L28-29 3/4" 6"
L28-30 1" 6"
Catalog Number "A" "L"
L28-31 Flush 3"
L28-32 1/4" 3"
L28-33 1/2" 3"
L28-34 3/4" 3"
L28-35 1" 3"
L28-36 Flush 6"
L28-37 1/4" 6"
L28-38 1/2" 6"
L28-39 3/4" 6"
L28-40 1" 6"

HOW TO ORDER:
Specify catalog number

NOTE: Calibration is Type J (Iron-Constantan). Type T (Copper-Constantan) and Type K (Chromel-Alumel) can be furnished on request. Construction: 304 S. S. flex hose and body. Single element made from 24 gauge fiberglass insulated wire. Dual element made from 30 gauge wire.

W. H. COOKE & CO. Phone: 717-630-2222 Page 7
EXTENSION CABLE ASSEMBLIES
SINGLE ELEMENT

Catalog Number Termination
Styles
L38-1 1 1
L38-2 2 1
L38-2M 2M 1
L38-3 3 1
L38-3M 3M 1
L38-7 2 3
L38-7M 2M 3M
L38-8 2 2
L38-8M 2M 2M
L38-9 3 3
L38-9M 3M 3M
DUAL ELEMENT
Duals are available in all of the above configurations. When ordering add D as a suffix to the number. e.g. L38-2-D.
MINI PLUGS AND JACKS
Mini plugs and jacks are available in all of the above configurations. When ordering add M as a suffix to the number. e.g. L38-8-M. 		Note:  Construction: Stainless steel, 13/16" ID S. S. hose tubing, 20 stranded gauge fiberglass insulated stranded wire.


TERMINATION STYLE 1:
TERMINATION STYLE 2:
TERMINATION STYLE 3:
W. H. COOKE & CO. Phone: 717-630-2222 Page 8
MINIATURE PLUGS AND JACKS



COLOR CODED JACKS

Catalog Number Type Color
MJ-J Iron-Constantan (J) Black
MJ-K Chromel-Alumel (K) Yellow
MJ-T Copper-Constantan (T) Blue
MJ-R/S Platinum/RHO 10% & 13% (R/S) Green


COLOR CODED PLUGS

Catalog Number Type Color
MP-J Iron-Constantan (J) Black
MP-K Chromel-Alumel (K) Yellow
MP-T Copper-Constantan (T) Blue
MP-R/S Platinum/RHO 10% & 13% (R/S) Green

STANDARD PLUGS AND JACKS



COLOR CODED JACKS

Catalog Number Type Color
SJ-J Iron-Constantan (J) Black
SJ-K Chromel-Alumel (K) Yellow
SJ-T Copper-Constantan (T) Blue
SJ-R/S Platinum/RHO 10% & 13% (R/S) Green


COLOR CODED PLUGS

Catalog Number Type Color
SP-J Iron-Constantan (J) Black
SP-K Chromel-Alumel (K) Yellow
SP-T Copper-Constantan (T) Blue
SP-R/S Platinum/RHO 10% & 13% (R/S) Green

BAYONET ADAPTORS - NICKEL PLATED STEEL
S. S. AVAILABLE UPON REQUEST

 PANEL JACK

(One piece construction
mounts in 1-1/8" cutout)





H32 Panel Jack (Specify J,K,T)
Catalog Number Length Thread
L68-1 7/8" 1/8 - 27 N.P.T.
L68-2 7/8" 3/8" - 24
L68-3 1-3/8" 1/8 - 27 N.P.T.
L68-4 1-3/8" 3/8" - 24
L68-5 2-1/2" 1/8 - 27 N.P.T.
L68-6 2-1/2" 3/8" - 24
L68-15 2-3/8" 14 x 1.5 MM
L68-16 2-1/2" 10 x 1.5 MM

COMPRESSION FITTINGS

Compression fittings slip over tube of sensors
for mounting and sealing into vessels.
WEATHER-PROOF BOOT
FOR STANDARD
PLUGS & JACKS



2 - Required

#H420
TUBE O.D. 1/8" 3/16" 1/4" MATERIAL
Thread Size 1/8-27 NPT 1/8-27 NPT 1/4-18 NPT ----------
Part No. BT18-B BT316-B BT14-B Brass
Part No. BT18-S BT316-S BT14-S Stainless Steel
W. H. COOKE & CO. Phone: 717-630-2222 Page 9
LUNAR-PAK MINERAL INSULATED (BENDABLE) T/C'S

HOT JUNCTION
TYPES 		Grounded (G)
 Ungrounded (UG)
 Exposed (E)

FIG. 1 Thermocouple w/20 ga. fiberglass insulated lead wire.
FIG. 2 Thermocouple w/20 ga. fiberglass insulated lead wire and stainless steel overbraid.
FIG. 3 Thermocouple w/20 ga. fiberglass lead wire and terminated with male plug.
FIG. 4 Thermocouple w/20 ga. fiberglass insulated lead wire and stainless steel overbraid and terminated with a male plug.
FIG. 5 Thermocouple w/20 ga. fiberglass insulated lead wire and terminated with female jack.
FIG. 6 Thermocouple w/20 ga. fiberglass insulated lead wire and stainless steel overbraid and terminated with a female jack.
FIG. 7 Thermocouple terminated with male plug.
FIG. 8 Thermocouple terminated with female jack.
FIG. 9 Thermocouple terminated with hinged flip top cover weatherproof head and 1/2" x 1/2" NPT x 1-1/2" long 316 SS NPT mounting fitting brazed to sheath. For spring loading add "SL" to end of part number. Spring loaded type is not sealed from process and is generally used with a thermowell.

NOTE: Screw cover head design is available at same price but must be requested otherwise flip top head will be supplied.
FIG. 9-EP Thermocouple terminated with explosion proof head - Same description as above except with screw cover explosion proof head assembly.
FIG. 10-NPT

Replacement thermocouple element for figures 9 through 9-EP.

Sheath is silver soldered to 1/2" NPT 316 SS MTG Nut.
W. H. COOKE & CO. Phone: 717-630-2222 Page 10
HOW TO ORDER "LUNAR-PAK" MINERAL INSULATED T/C'S
(SELECT APPROPRIATE SYMBOLS TO BUILD A PART NUMBER)
THERMOCOUPLE AND EXTENSION WIRE

DUPLEX CONDUCTOR, THERMOCOUPLE GRADE
Catalog Number Gauge Wire
Type		 Calibration Insulation
Each Conductor		 Insulation
Overall		 Nominal
Size O. D.
J20-3-302 20 Stranded Iron-Constantan Double Glass Braid Glass Braid .075 x .137
J20-3S-302 20 Stranded Iron-Constantan Double Glass Braid Glass Braid and
Stainless Overbraid		 .100 x .162
J24-1-304 24 Solid Iron-Constantan Glass Braid Glass Braid .047 x .081
J20-1-508 20 Solid Iron-Constantan Teflon Teflon .047 x .078
J20-1-305 20 Solid Iron-Constantan Glass Wrap Glass Braid .032 x .052
K20-1-304 20 Solid Chromel-Alumel Glass Braid Glass Braid .059 x .105
K24-1-304 24 Solid Chromel-Alumel Glass Braid Glass Braid .047 x .081
T20-1-304 20 Solid Copper-Constantan Glass Braid Glass Braid .059 x .105
T20-1-508 20 Solid Copper-Constantan Teflon Teflon .060 x .095
All Glass Braided wire is Silicone Impregnated

DUPLEX CONDUCTOR, EXTENSION GRADE
Catalog Number Gauge Wire
Type		 Calibration Insulation
Each Conductor		 Insulation
Overall		 Nominal
Size O. D.
J16-5-502 16 Solid Iron-Constantan PVC PVC .111 x .188
K16-5-502 16 Solid Chromel-Alumel PVC PVC .122 x .193
K20-5-502 20 Solid Chromel-Alumel PVC PVC .113 x .182
T16-5-502 16 Solid Copper-Constantan PVC PVC .122 x .193

Color Code: Iron White, Constantan Red, Overall Black, Chromel Yellow, Alumel Red, Overall Yellow, Copper Blue, Constantan Red, Overall Blue. This is a partial listing of wire available. Inquire about other insulations and gauges.

W. H. COOKE & CO. Phone: 717-630-2222 Page 11
PLATINUM RESISTANCE TEMPERATURE
DETECTOR (RTD) PROBES
FLIP TOP HEAD TYPE

Catalog Number Alpha Max Sheath Temp.
R288-1 0.00385 500°F
R288-1-HT 0.00385 1000°F
R388-1 0.00392 500°F
R388-1-HT 0.00392 1000°F

HOW TO ORDER:
1. Indicate catalog number
2. Specify "A" length
3. Specify 2, 3, or 4 wires

Order Example: R288-1 A=4" 3 wires



RTD terminated with hinged flip top cover weatherproof head and 1/2" x 1/2" NPT x 1-1/2" long 303 S. S. NPT mounting fitting brazed to sheath.
NOTE: For spring loading add "SL" to end of part number. Spring loaded type is not sealed from process. For adjustable immersion depth use compression fittings on page 8.
Screw cover head design is available at same price but must be requested otherwise flip top head is supplied.
GENERAL PURPOSE TYPE

Catalog Number Alpha Lead Type Max Sheath Temp.
R218-38 0.00385 teflon 400°F
R218-38-HT 0.00385 teflon 1000°F
R318-38 0.00392 teflon 400°F
R318-38-HT 0.00392 teflon 1000°F





TRANSITION FITTING DIMENSIONS


STANDARD TYPE


HIGH TEMP TYPE (HT)
with Transition & Strain Relief Spring

NOTES:
1. For adjustable immersion depth use compression fittings on page 8.
2. 304 stainless steel top with fiberglass or teflon covered wires.
3. Teflon wire rated 400°F. (Fiberglass lead wire available by request - rated 800°F)

HOW TO ORDER:
1. Specify catalog number
2. Specify "A" length
3. Specify "B" length
4. Specify 2, 3 or 4 wires

Order Example: R218-38 A=4" B=5' 3 wires

GENERAL SPECIFICATIONS
 Type of Element: Platinum, 100 ohms @ 0°C+-0.1 ohms. Calibration: DIN (European) curve.
Alpha = 0.00385 ohms/ohm/°C or N.B.S. (American) curve. Alpha = 0.00392 ohms/ohm/°C. Leads: 22 ga. stranded unless otherwise specified.

RTD LEAD WIRE

Catalog Number Gauge Wire Type Calibration Insulation
Each Conductor		 Insulation
Overall		 Nominal
Size O. D.
RT3-22-4-701 22 Stranded RTD PVC PVC 0.158
RT3-24-8-702 24 Stranded RTD Teflon/Fiberglass Teflon 0.145
RT3-24-8-705 24 Stranded RTD Fiberglass Fiberglass 0.090


W. H. COOKE & CO. Phone: 717-630-2222 Page 12
Portable Thermocouples for use with
Hand Held Digital Thermometers
Available in Type J, K, or T Calibrations

Catalog No. GPP - General Purpose Probe - Max. Tip Temperature: 600°F
Catalog No. GPP-HT - General Purpose Probe - High temp version - tip rated to 1400°F
General purpose sensor used for a variety of applications.


Catalog No. PP - Penetration Probe - Max. Tip Temperature: 600°F
Used to take "jab in" readings of semi-soft materials such as molten plastic, foodstuffs, etc.
Typically used to measure internal temperature of meat.


Used to measure temperature of surfaces such as heat sealing bars and platens.
Catalog No. SPA - Surface Probe - Max. Tip
Temperature: 500°F continuous, 1000°F intermittent.


Catalog No. AP - Air Probe - Max. Tip Temperature: 600°F
Used to measure air temperature in ducts. Small gauge
"beaded" junction recessed in "Flow Thru" vented tip.

HOW TO ORDER:
1. Specify Model Number
2. Specify Calibration
Order Example: AP-K

NOTE:
1) Sheath (tip) available in other diameters, lengths and materials by request.
2) Cable available in other lengths by request.
3) A) Top collar is 303 SS. B) Handle is black phenolic. C) Strain relief is PVC.
W. H. COOKE & CO. Phone: 717-630-2222 Page 13
PORTABLE DIGITAL THERMOMETERS


Jenco Model 701-J, K, T


 Uses 9 volt battery.
Has a magnetic back for attaching to metal surfaces.
You must specify F or C range.

Model Range
701-JC -50 to +700°C
701-JF -50 to +1200°F
701-KC -50 to +800°C
701-KF -50 to +1000°F
701-TC -50 to +400°C
701-TF -50 to +700°F

Fluke Model 50S



 Accepts J and K type thermocouples.
Readout displays °C or °F.
Includes a protective holster.
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