THERMOWells

Thermocouples & Thermometers
 

What we offer.

•Flanged
•Van Stone Type
•Standard Threaded or Weld-In
•Ceramic Protecting Tubes

•Silicon Protecting Tubes

•Injection Quills

•Burner Tips

We can produce thermowells of all shapes and size. Please have all of your custom dimensions ready when placing your order.  

Straight, Tapered, and Stepped

Standard Threaded Thermowells

(Straight, Tapered, and Step-Down Shank) 

Flanged Thermowell
(Straight, Tapered, and Step-Down Shank)

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Flanged Tapered Thermowell

Thread Size:  3/4" or 1" NPT
Bore Size: .260" or .385"
Hex Size: 1 1/8" or 1 3/8"
Insert Length: 2 1/2" through 22 1/2" (ask about custom lengths)
Material: T304 and T316 stainless steel, monel and all alloys

Flange Size: 1" and up
Flange Rating: 150# through 2500#
Flange Facing: Raised face and ring-type joint
Bore Size: .260" or .385"
Insert Length: 2" and up
Material: T304 and T316 stainless steel, monel and all alloys

Injection Quill

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Van Stone Thermowell

(Straight, Tapered, Step-Down Shank)

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Van Stone Thermowell (left)

Van Stone Injection Quill (right)

Facing: Raised face
Bore Size: .260" or .385"
Insert Length: 2" and up
Material: T304 and T316 stainless steel, monel and all alloys

Please have the following information ready

1. Material
2. Overall length
3. "U" length
4. Bore diameter
5. Straight, tapered or stepped stem

6. Process connection and instrument connection sizes.
7. Tip diameter & stem diameter

Need to order a

custom thermowell?

Injection Quill designs can be very specific and very different from one another. We are capable of fabricating many different types and variations to suit your needs. 

We also have
Sandelius Instrumentation Products

• Thermocouples
• RTD
• Multi-Point Thermocouples
• Assemblies
• Ceramic Thermocouples

• Tubeskin Thermocouples 
• Radial-Weld Pad Covers

• Transmitters

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Thermometers

Tel-Tru Bimetal Thermometers

3", 4" and 5" diameter head
Stem lengths 2 1/2 to 24"
Dozens of temperature ranges available

Model Codes

AA-375R 3",  AA-475R 4", AND AA-575R 5" diameter head
with calibration feature

Specifications 

Tel-Tru Logo

Stem Lengths:             2 1/2", 4", 6", 9", 12", 15", 18" and 24" (available up to 120")

 

Stem Diameter:          .250" standard up to 42" stem. .375" standard over 42" stem.

 

Connection:                 1/2" NPT.

 

External Reset:            Easy to calibrate by inserting 1/16" Allen wrench into reset opening.

 

Construction:              304 stainless steel external parts. Welded construction.
                                        Corrosion resistant to most chemicals.

 

Hermetic seal:             Per ASME B40.3 dustproof and leakproof.

Harness:                        All stainless steel brackets with screws that loosen to allow 360° 
                                        rotation of head and 180° adjustment of stem position.

Bellows:                        Heavy-duty flexible stainless steel. Hermetically sealed at case and
                                        connection. Protects mechanism that transfers temperature change 
                                        from bimetal coil to pointer.

 

Dial:                               True Anti-Parallax dial, easy-to-read from any angle, minimizes
                                       reading errors. Anodized aluminum with large black numbers and graduations.

 

Lens:                             Glass.

 

Bimetal Coil:              Helix coil is silicone coated on ranges below 500°F for vibration 
                                      dampening and to maximize heat transfer and response time.

 

Accuracy:                   +/-1% full span per ASME B40.3 Grade A. Adjustment of the angle
                                      between case and stem may affect accuracy up to 0.5% of span 
                                      (ASME B40.3).


Over Temperature    Up to 250°F 100%; 250°F to 550°F, 50%; 550°F to 1000°F,
Limits:                           continuous use up to 800°F, intermittent use over 800°F.

Tel-Tru Thermometer face

Fahrenheit

-110/100°

-50/120°

-40/160°

0/140°

0/180°

0/200°

0/220°

0/250°

0/300°

0/500°

20/240°

25/125°

50/250°

50/300°

50/400°

50/500°

50/550°

100/800°

150/750°

*200/1000°
 

°/Div.

10°

10°

10°

10°

Celsius

-75/175°

-70/70°

-50/100°

-50/25°

-50/50°

-40°/70°

-20°/120°

-10/110°

0/50°

0/60°

0/80°

0/100°

0/150°

0/200°

0/250°

0/300°

0/400°

0/450°

100/400°

*100/550

°/Div.

1/2°

1/2°

Standard Ranges

Fahrenheit

-110/100°

-50/120°

-40/160°

0/140°

0/180°

0/200°

0/220°

0/250°

0/300°

0/500°

20/240°

25/125°

50/250°

50/300°

50/400°

50/500°

50/550°

100/800°

150/750°

*200/1000°
 

Celsius

-75/175°

-70/70°

-50/100°

-50/25°

-50/50°

-40°/70°

-20°/120°

-10/110°

0/50°

0/60°

0/80°

0/100°

0/150°

0/200°

0/250°

0/300°

0/400°

0/450°

100/400°

*100/550

Dual Ranges

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Tel-Tru Thermometer

* Thermometers with temperature ranges 200/1000°F and 100/550°C are NOT recommended for continuous use above 800°F/425°C (for intermittent use only).

Options

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Union connection or other connection types and sizes.
 
Silicone filled.
 
Other lenses are acrylic, polycarbonate, shatterproof glass
    or tempered glass.
 
Other stem diameters .236" (6mm), .315" (8mm), .375" (9.52mm).
 
316SS wetted parts.
 
Other configuration combinations available upon request.

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