Sheath Alloys	Standard Needle	Reinforced needle	Insertion sensors
Tapered cone	Bendable needle	Teflon coated	ERT needle
RT needle		Weighted needle

 

 

Needle Sensors
or as they are commonly referred to, Immersion sensors.

Sheathed Thermocouples
Sheathed thermocouples are similar in construction to electric heating elements. Ceramic insulators are strung on the wires, the sheath is drawn over the insulated wires,
this causes compaction of the entire assembly. The initial geometry is crucial to getting a highly reliable final product. EDL sets the highest standards in the thermocouple manufacturing industry, by manufacturing only the highest quality sheathed thermocouple stock.

Sheath
EDL uses the highest quality alloys whose molecular structure dramatically decreases the chance of thermocouple contamination, thus, ensuring longer life cycle and lower failure rates.

Insulator
The use of the highest quality compaction grade Magnesium Oxide assures the required insulator inertness. Inertness is crucial in thermocouple applications to avoid the migration of atoms between the sheath, the insulator and the thermocouple wires, that may cause sensor decalibration.

Junction
All junctions are brazed or TIG welded, unlike that of many companies who crimp their junctions to reduce the production costs. Brazing or welding the junctions increases impermeability of the sheath, thus, creating greater confidence in temperature measurement.

Cold End Seal
High temperature cement is used to provide a solid barrier to moisture and contamination in the back end of the thermocouple.

 

2 Internal Needle Constructions Available

Grounded Junction

The grounded junction is the standard construction because it has the thermocouple integral at the Sheath closure, thus causing the least thermal lag.

 

Ungrounded Junction

Ungrounded junctions isolate the thermocouple junction from the Sheath closure thus assuring electrical isolation from the Sheath, but it is at the sacrifice of some thermal lag.

EDL Standard Needles use a grounded tip design for instantaneous response. Needles with an ungrounded construction are also available. In environments with static, stray EMF's, or monitoring conductive solutions, the ungrounded needle will often prove to be be more suitable.

return to top

Sheath Alloy Types
Sheath alloys are often required in different material types to suit your specific application.  The following is a list of sheath materials and their corresponding EDL codes. There may be an increase in the cost of the thermocouple sensor due to the price of the sheath material and the required manufacturing changes that are associated with it. Please contact our sales department for a quotation on items that are not in our catalog.

S0 - Stainless Steel Type 310
S1 - Stainless Steel Type 321
S4 - Stainless Steel Type 304
S6 - Stainless Steel Type 316
I0 - Inconel Type 600
I1 - Inconel Type 601
I5 - Inconel Type 625

 

Standard Sheath Diameters

Fine		Standard		Process & Insertion
N R E P	0.010” 0.020” 0.035” 0.040”	T K F M Q	0.050” 0.059” 0.072” 0.083” 0.093”	D V A C G	0.125” 0.187” 0.250” 0.313” 0.375”
Note: Not all Sheath alloys are available in all diameters above

 

---

Standard Needle Sensor

• 0.050” to 0.93” diameter
• 1” to 24” long
• For general use in liquids and subsurface's
• Various sheath and lead lengths available
• Ceramic handle for insulation
• Blunt, Center sharp, and Hypodermic sharp tips

Specifications
Sensing Tip............................................ diameter as ordered
Handle ...............................2”long x 0.343” diameter ceramic
Lead ........................................32” long stainless steel woven over braid w/ #20 gauge stranded thermocouple grade wire Teflon® insulated and twisted
Accuracy ....................................... ±1.5°C @ 300°C or 0.4%
Response time ............................1 second to 95% of reading

Model	Temp.	Junction	Alloy	T/C	Diam.	Length	Termination	$
NB = Blunt NC=Center Sharp NH=Hypodermic sharp	06=320°C 600°F   15=815°C 1500°F	G   G	S4   S0	E, J, K, or T	T=0.050" K=0.059" F=0.072" M=0.083" Q=0.093"	1=1" 2=2" 3=3" 4=4" 5=5" 6=6"	M=Mini plug P=Phono plug (Analog) C=Coil cord with Mini plug L=Standard plug U=Un terminated A=Spade lugs (Analog) E=Mini plug- no lead R=RT - use DRT handle	68 68 68 68 68 68 48 48
NOTE: Change G to U for ungrounded junction and add $5 to final price NOTE: T max temperature is 400°C NOTE: For lengths over 6" add $2 per inch to final price maximum length 24"

PART NUMBER
To make a part number Use the RED letters and add the prices as required.

Example:

Blunt grounded needle for operation at 200°C with 32" lead with mini plug, thermocouple type K, with a diameter of 0.072" and a length of 7" in type 304 Stainless steel.
NB + 06 + G + S4 + K + F + 7 + M = $68 + $2 = $70

Final part # is NB06GS4KF7M @ $70.00 each.

To buy Now, please click here for a connection to the Online store.

return to top

 

NEEDLE FINE

 

• 0.040” or smaller
• 0.25” to 12.0” Long
• For use in soft materials
• Fastest response times
• Various sheath and lead lengths available

Specifications
Sensing Tip..............................................diameter as ordered
Handle ..............................2” long x 0.343” diameter ceramic
Lead ........................................32” long stainless steel woven over braid w/ #20 gauge stranded Thermocouple grade wire Teflon®. insulated and twisted.
Accuracy ........................................................ ±1°C @ 300°C
Response time ............................1 second to 95% of reading

Model	Temp.	Junction	Alloy	T/C	Diam.	Length	Termination	$
NBF = Blunt NCF=Center Sharp NHF=Hypodermic sharp	06=320°C 600°F   15=815°C 1500°F	G   G	S4   S0	E, J, K, or T	R=0.020" E=0.035" P=0.040"	1/4" through 4"	M=Mini plug P=Phono plug (Analog) C=Coil cord with Mini plug L=Standard plug U=Un terminated A=Spade lugs (Analog) E=Mini plug- no lead R=RT - use DRT handle	86 86 86 86 86 86 66 66
NOTE: T max temperature is 400°C NOTE: For lengths over 6" add $2 per inch to final price max length 12"

Please note: The above sensors can be supplied in 0.012" and 0.015" diameters.

 

return to top

 

PART NUMBER
To make a part number Use the RED letters and add the prices as required.

Example:

Center sharp grounded needle for operation at 200°C with 32" lead with mini plug, thermocouple type J, with a diameter of 0.040" and a length of 3 " in type 304 Stainless steel.
NCF + 06 + G + S4 + J + P + 3 + M = $86

Final part # is NCF06GS4JP3M @ $86.00 each.

To buy Now, please click here for a connection to the Online store.

 

 

Reinforced Needles

 

• Any needle 1” or longer, sharp or blunt, low or high temperature can be reinforced
  with a heavier gauge stainless steel tubing
• Sensing tip is exposed assuring fast response
• Various sheath and lead lengths available upon request
• Available in Blunt, Hypodermic, or Center sharp configuration
• The reinforcement gives higher rigidity and bend resistance

Specifications
Sensing Diameter....................................................as ordered
Handle .............................. 2” long x 0.343” diameter ceramic
Lead ........................................ 32” long stainless steel woven over braid, #20 gauge stranded thermocouple grade wire, Teflon® insulated and twisted
Accuracy ............................... ±3° or 1%, whichever is greater
Response time .............................. 3.5 sec. to 95% of reading

Model	Temp.	Junction	Alloy	T/C	Diam.	Length	Termination	$
Standard Needles NBR = Blunt NCR=Center Sharp NHR=Hypodermic sharp	06=320°C 600°F   15=815°C 1500°F	G   G	S4   S0	E, J, K, or T	T=0.050" K=0.059" F=0.072"	1=1" 2=2" 3=3" 4=4" 5=5" 6=6"	M=Mini plug P=Phono plug (Analog) C=Coil cord with Mini plug L=Standard plug U=Un terminated A=Spade lugs (Analog) E=Mini plug- no lead R=RT - use DRT handle	76 76 76 76 76 76 56 56
Fine Needles NBFR = Blunt NCFR=Center Sharp NHFR=Hypodermic sharp	06=320°C 600°F   15=815°C 1500°F	G   G	S4   S0	E, J, K, or T	R=0.020" E=0.035" P=0.040"	1=1" 2=2" 3=3" 4=4"	M=Mini plug P=Phono plug (Analog) C=Coil cord with Mini plug L=Standard plug U=Un terminated A=Spade lugs (Analog) E=Mini plug- no lead R=RT - use DRT handle	94 94 94 94 94 94 74 74
NOTE: Change G to U for ungrounded junction and add $5 to final price NOTE: T max temperature is 400°C NOTE: For lengths over 6" add $3 per inch to final price maximum length 24"

PART NUMBER
To make a part number Use the RED letters and add the prices as required.

Example:

Center sharp ungrounded needle for operation at 200°C with 32" lead with mini plug, thermocouple type K, with a diameter of 0.040" and a length of 3 " in type 304 Stainless steel.
NCR + 06 + U + S4 + K + K + 8 + M = $76 + 5 + 6 (2*3)= $87

Final part # is NCR06US4KK8M @ $87.00 each.

To buy Now, please click here for a connection to the Online store.

 

return to top

 

Excuse us but we are still under construction

 

ERT needle

 

RT needle

Excuse us but we are still under construction

 

Weighted needle

 

return to top

 

Excuse us but we are still under construction

 

return to top