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


Temperature is a critical factor in every stage of the maple syrup industry, from sap collection and processing to bottling and storage. Proper temperature management is essential to uphold the quality, flavor, and safety of maple syrup products. Tel-Tru supports the maple syrup industry by providing precision instruments for temperature monitoring at every stage of production. By integrating Tel-Tru’s temperature monitoring equipment; bimetal dial thermometers, digital thermometers, remote monitoring systems and thermometer calibrators producers can ensure that the syrup meets industry standards and consumer expectations.
If your filter selections require us to create a product to fit exact specifications, rest assured. For over 100 years we have built over 100,000 versions of our products. We will leverage that experience to build your product to exact specification with rapid turnaround using the RFQ results link.
Or you can reset the filters to find a close alternate in-stock item.
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Seasonal timing and optimal temperatures are essential for triggering sap flow and achieving desired sugar concentration during sap collection. Monitoring optimal temperatures ensures higher yields of sap with the desired sugar concentration, crucial for producing top-quality maple syrup. Tel-Tru’s temperature monitoring equipment aids in maintaining precise boiling temperatures during sap processing, ensuring optimal evaporation without over-cooking the syrup. This accuracy is vital for consistent quality and flavor.
During finishing and bottling, temperature control is crucial for filtering and sterilizing the syrup, preventing microbial growth and spoilage. Proper storage temperature, ideally between 32°F and 50°F, is also essential to preserve the syrup’s flavor and quality over time.