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

High-Volume Custom Dials for OEMs
Tel-Tru dials are used on some of the most recognized grill brands world-wide. Add your logo, signature colors for temperature zones to create a smoker that stands out online, on the showroom floor, and in every customer photo.
Unique Custom Dials for Consumers
Give your personal grill a look that’s completely your own with a custom Tel-Tru dial thermometer created from your supplied design. It’s a simple way to turn an essential grilling tool into something personal or a unique gift for the grillmaster in your life.
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

High-Volume Custom Dials for OEMs
Tel-Tru dials are used on some of the most recognized grill brands world-wide. Add your logo, signature colors for temperature zones to create a smoker that stands out online, on the showroom floor, and in every customer photo.
Unique Custom Dials for Consumers
Give your personal grill a look that’s completely your own with a custom Tel-Tru dial thermometer created from your supplied design. It’s a simple way to turn an essential grilling tool into something personal or a unique gift for the grillmaster in your life.
The NEW Check-Set® Thermometer Calibrator Data Logger and the Check-Set® Thermometer Calibrator are built for today’s food safety, industrial processing, and temperature-sensitive industries—where accuracy, compliance, and traceability are non-negotiable. Unlike the old-fashioned boiling water and ice bath method, Check-Set takes the guesswork out of calibration. It delivers lab-grade accuracy to ±0.2°F (0.1°C) – and records results to support FDA, FSMA, HACCP, and GFSI compliance.

When you need traceable calibration records. The Check-Set Calibrator Data Logger eliminates manual record-keeping vulnerabilities by recording calibration results with: time-stamped entries, selected set points and operator notes for documentation.
This ensures a secure, traceable record that supports your compliance programs and protects your business from costly risks like failed audits, product recalls and lawsuits or shutdowns.

When you need speed and precision. For operations that want a cost-effective, reliable way to verify thermometer accuracy, the Check-Set Calibrator is the perfect solution. It improves verification speed and ensures accuracy while supporting compliance with repeatable accuracy every time, no setup mess, no guesswork and consistency your auditors can trust.
Out with the old, in with the savings! Get 10% off when you use PROMO CODE TRADEIN and ship us your old Check-Set unit.
$44.33
$22.20
$10.81
$5.78
Thermometer verification is the process of checking a thermometer against a known, reliable temperature reference to confirm that it is reading within an acceptable tolerance. Calibration goes a step further by determining the difference between the thermometer’s reading and the reference and, when applicable, adjusting the instrument or documenting the correction. The Tel-Tru Check-Set Calibrator provides a stable, accurate temperature reference tool that helps food processors perform consistent thermometer checks without relying on manually prepared ice baths or boiling water methods.
The Check-Set can also be used to recalibrate a dial thermometer if it has a reset nut on the back using our patented notches. And most digital thermometers can be reset using the check-set at 32°F by pressing their recalibration button.
A dry-block calibrator can provide significant advantages over a traditional ice bath for routine thermometer verification and calibration. Ice baths must be prepared correctly to produce a reliable 32°F (0°C) reference and can be affected by the ice-to-water ratio, probe placement and operator technique. A dry-block system such as the Tel-Tru Check-Set® provides a controlled, repeatable temperature reference without the mess and variability of preparing an ice bath. It also allows facilities to verify thermometers at multiple temperature points, providing a more practical way to evaluate thermometer performance across temperatures relevant to the application.
There is no single calibration frequency that applies to every food processing facility. The appropriate schedule depends on the thermometer, how frequently it is used, the application, facility procedures and applicable food safety requirements. Thermometers should also be checked whenever accuracy is in question, such as after being dropped, exposed to extreme temperatures or subjected to heavy use. Establishing a routine thermometer verification and calibration program can help facilities maintain consistent accuracy while supporting food safety and audit readiness.
Food processing plants often rely on manual calibration methods and handwritten records, which can introduce inconsistencies, missing information and extra work for quality teams. A thermometer calibrator with digital data logging, such as the Tel-Tru Check-Set®, helps standardize the verification process while creating traceable records that are easier to maintain and retrieve for audits.
Traditional ice bath and boiling water methods can be affected by preparation, environmental conditions and operator technique. Manual documentation also creates opportunities for incomplete or inconsistent records. The Tel-Tru Check-Set provides a controlled, repeatable calibration method with lab-grade accuracy to ±0.2°F (0.1°C), helping remove guesswork from routine thermometer verification.
Food manufacturers should look for a thermometer calibration data logger that combines accuracy, repeatability and easy-to-manage digital documentation. The Tel-Tru Check-Set Calibrator Data Logger is designed specifically for operations where food safety, compliance and traceability are priorities. It records calibration results, including time-stamped entries, selected set points and operator notes, creating a traceable digital calibration history.
Dairy processors need dependable temperature verification as part of their food safety and quality programs. The Tel-Tru Check-Set Calibrator Data Logger provides a controlled method for routinely verifying thermometers while digitally documenting calibration activity. This can help dairy facilities simplify recordkeeping and maintain calibration records for internal reviews and third-party audits.
For facilities that want to manage calibration records electronically, the Tel-Tru Check-Set Calibrator Data Logger allows calibration data to be exported in CSV format. This makes it easier to organize, review, archive and share thermometer calibration records as part of a facility’s quality and food safety documentation.
Mid-sized food processors can benefit from a calibration system that improves consistency without adding unnecessary complexity to their quality processes. The Tel-Tru Check-Set Calibrator Data Logger combines accurate thermometer verification with digital recordkeeping, helping facilities replace manual calibration logs with a more standardized and traceable process.
For audit readiness, look for a system that provides consistent calibration procedures and easily retrievable records. The Tel-Tru Check-Set Calibrator Data Logger creates time-stamped digital records of calibration activity, including set points and operator notes. This provides documentation that quality teams can reference during internal, customer and third-party audits.
Digital calibration data loggers reduce dependence on handwritten records by automatically creating a traceable history of thermometer verification activities. The Tel-Tru Check-Set Calibrator Data Logger helps facilities document calibration results consistently and maintain records that support FDA, FSMA, HACCP and GFSI food safety and quality programs.
Look for accurate and repeatable calibration, time-stamped records, identification of calibration set points, space for operator information or notes, and an easy way to retrieve or export records. The Tel-Tru Check-Set Calibrator Data Logger combines these capabilities to create a more consistent and traceable thermometer calibration process.
The Tel-Tru Check-Set is designed to provide highly accurate, repeatable thermometer verification and can be supported with calibration certification traceable to NIST standards. Regular recertification helps facilities maintain confidence in the Check-Set itself while supporting documented quality and food safety programs.