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 monitoring plays a crucial role in all stages of gas and oil production, from initial extraction to final distribution.
Industrial sensors are designed for applications in hazardous environments to monitor the temperature of oil and gas during the production and refining processes. The industry demands high accuracy temperature sensors, necessitating temperature measurement solutions that are accurate and resistant to corrosion. Tel-Tru is a leading provider of thermometers and resistance temperature detectors (RTD’s) essential to the chemical, oil, and gas industries for temperature monitoring applications.
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.
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Safety is paramount due to the flammable nature of oil and gas – making reliable, accurate, and cost-effective measuring instruments essential for safe and efficient operations. Adherence to regulatory compliance is also crucial to maintaining safety throughout drilling, transporting, and refining phases.
Within refineries, there is a critical need to monitor high pressures and temperatures including distillation, fractionation, hydrocracking, and process treatment. Accurate temperature measurement is essential in combustion furnaces, where temperatures can range from 0° to 1,260°C. Processes such as LNG (Liquefied Natural Gas) and CNG (Condensed Natural Gas) production also require reliable measurement instruments for refrigeration monitoring and other methods like biodiesel and ethanol production.
Data logging is crucial in the oil and gas industry for enhancing operational efficiency, safety, and decision-making. Real-time monitoring of drilling operations, production rates, and equipment status allows for immediate optimization and reduced downtime. Predictive maintenance, facilitated by continuous data logging, helps prevent costly equipment failures and extends machinery lifespan. It is a fundamental aspect of modern oil and gas operations that drives improvements across all facets of the industry.
Tel-Tru offers a diverse range of temperature measurement solutions tailored to meet the rigorous demands of the oil and gas industry:
Dial Thermometers designed to deliver reliable, accurate readings in the toughest industrial environments and built to order using a wide range of configurations.
Adjustable Angle Large Industrial Dial Thermometers (Bimetal) available in 3″, 4″, and 5″ sizes, these thermometers feature a heavy-duty design with a versatile case and stem that can be adjusted to almost any angle for easy viewing. They are preferred across various industries, including process, offshore, power, and chemical sectors.
Back Connected Large Industrial Dial Thermometers (Bimetal) available in 3″, 4″, and 5″ sizes, these thermometers have a rugged 90° back angle, rear-threaded connection design.
Pressure Gauges process with +/- ½% accuracy and general industrial gauges with stainless steel tube and socket.
Remo-Tel Industrial SMART Temperature Monitoring System wireless automated monitoring and data collection of your industrial process. Real-time data monitoring and temperature alerts save time and expense with improved efficiency.
Digital Thermometers designed to deliver reliable, accurate readings in the toughest industrial environments and built to order using a wide range of configurations.
Industrial RTD Assemblies and Transmitters that are highly configurable and deliver outstanding reliability. Standard assemblies include a thin film PT100 platinum RTD sensing element in a welded 316L stainless steel probe, suitable for various applications including chemical processing, and oil and gas.
Heavy duty Thermowells in Threaded, Flanged, and Weld-in configurations in 304ss, 316Lss, and other special materials to protect your temperature sensors. Tel-Tru thermowells protect your instruments from corrosion and pressure in harsh environments and provide a barrier between the process fluid and the sensor for safe and reliable temperature measurements. Thermowells can extend the lifespan of the sensor and reduce maintenance costs and downtime associated with sensor replacement. Thermowells are used in pipelines, refineries, and processing plants.
Tel-Tru temperature instruments are engineered to withstand harsh conditions, whether used in offshore rigs, floating production storage and offloading vessels (FPSO) or shale fields. They provide precise and dependable measurements, crucial for protecting equipment, ensuring employee safety, and safeguarding the environment. In midstream applications, from tank cars and transfer stations to pipelines and pump stations, Tel-Tru’s instruments are ideal for monitoring temperature and ensuring the safety of both employees and equipment.