View our Frequently Asked Questions.
Digital Thermometers
Tel-Tru’s Digital Thermometers are designed to deliver reliable accurate readings in the toughest industrial environments. All models are built to order using our wide range of configurations, delivering customers exactly what they need.
Dial Thermometers
Tel-Tru designs and manufactures industrial thermometers and other quality industrial temperature instruments to improve quality and operational performance.
RTD Sensors
Check-Set® Thermometer Calibrators
Check-Set Calibrator Data Logger for traceable digital record keeping.
Check-Set Calibrator for fast, easy, and accurate verification.
Remo-Tel®
The Remo-Tel Industrial Temperature Monitoring System automates temperature data logging and provides a 24/7 online monitoring dashboard for industrial and commercial operations to help mitigate risk for product loss and system failure and improve productivity. The Remo-Tel System is ideal for a wide variety of processes including Refrigeration, Molding, Brewing and other extremely time sensitive temperature monitoring applications.
Thermowells
Thermowells for sanitary applications as well as thermowells that can be treated and documented to NACE standards. Thermowells are recommended for pressure, corrosive fluid, or high velocity applications. Produced using highest quality material and machined from solid bar stock for standard or high velocity requirements in a large selection of materials and coatings. Designed and manufactured to assure perfect alignment with the thermometer stem.
Glass Industrial
Our glass industrial thermometers are versatile and adjust-angle, with a lens front and red liquid fill. They are NIST calibrated and guaranteed accurate to ± one scale division.
Pressure Instruments

Digital Thermometers
Tel-Tru’s Digital Thermometers are designed to deliver reliable accurate readings in the toughest industrial environments. All models are built to order using our wide range of configurations, delivering customers exactly what they need.
Dial Thermometers
Tel-Tru designs and manufactures industrial thermometers and other quality industrial temperature instruments to improve quality and operational performance.
RTD Sensors
Check-Set® Thermometer Calibrators
Check-Set Calibrator Data Logger for traceable digital record keeping.
Check-Set Calibrator for fast, easy, and accurate verification.
Remo-Tel®
The Remo-Tel Industrial Temperature Monitoring System automates temperature data logging and provides a 24/7 online monitoring dashboard for industrial and commercial operations to help mitigate risk for product loss and system failure and improve productivity. The Remo-Tel System is ideal for a wide variety of processes including Refrigeration, Molding, Brewing and other extremely time sensitive temperature monitoring applications.
Thermowells
Thermowells for sanitary applications as well as thermowells that can be treated and documented to NACE standards. Thermowells are recommended for pressure, corrosive fluid, or high velocity applications. Produced using highest quality material and machined from solid bar stock for standard or high velocity requirements in a large selection of materials and coatings. Designed and manufactured to assure perfect alignment with the thermometer stem.
Glass Industrial
Our glass industrial thermometers are versatile and adjust-angle, with a lens front and red liquid fill. They are NIST calibrated and guaranteed accurate to ± one scale division.
Pressure Instruments

Not exactly what you need? Send us an RFQ for a custom order.
*Photo for reference purposes only. Consult product description or call customer service for questions.
$90.27

Designed for precision and accuracy in temperature measurement. Our legendary American-made thermometers provide reliability and trust across many industrial applications. Built with quality and durability and tailored to meet specific needs with customized solutions from standard components. Quick lead times, competitive pricing, and the best value in dial thermometers.

To ensure the longevity and accuracy of your Tel-Tru thermometer, please avoid placing the thermometer face inside or too close to a heat source, such as an oven, grill, or open flame. Excessive heat exposure may damage the thermometer’s internal components, leading to inaccurate readings or permanent failure.
Bi-Metal Dial Thermometer, GT300R, 3in Dial, Back Connected, 304 Stainless Steel, 2.5in Long, .250in Diameter Pointed Tip Stem, 50/500FC, Glass Lens, 1/2 NPT, Recal, NIST Traceable, Made in the USA
| Connection Type | 1/2" NPT |
|---|---|
| Dial Size | 3 |
| Lens Material | Glass |
| Material | 304 Stainless Steel |
| Max Temp | 500 |
| Min Temp | 50 |
| Model | GT300R |
| Reset | Yes |
| Stem/Probe Diameter | .250 |
| Stem/Probe Length | 2.5 |
| Style | Back |
| Tip Type | Pointed |
| Tolerance Deg (+/-) | 4.5 |
| Tolerance % (+/-) | 1% |
| Units | F° & C° |
| Warranty | 8 Year(s) |
| Temperature Range | 50/500FC |
| Dial Color | Silver |
| Lead Time (business days) | 5 |
View our Frequently Asked Questions.
Our goal is 100% customer satisfaction. For warranty returns, a return authorization (RA) number is required.
For warranty information concerning a product purchased from Tel-Tru, please refer to Section 12, Warranty, of our Terms and Conditions policy.
If the product was purchased from a reseller, please contact them for the return authorization number.
If the product was purchased directly from Tel-Tru, please contact our customer service at 585.308.9904 / 800.232.3857 or info@teltru.com.



