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-SetĀ® Thermometer Calibrators
Check-Set Calibrator Data Logger for traceable digital record keeping.
Check-Set Calibrator for fast, easy, and accurate verification.
Remo-TelĀ®
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-SetĀ® Thermometer Calibrators
Check-Set Calibrator Data Logger for traceable digital record keeping.
Check-Set Calibrator for fast, easy, and accurate verification.
Remo-TelĀ®
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


Tel-Tru is proud to be a made in USA manufacturer of temperature monitoring instruments, calibration equipment, and accessories for United States government agencies and branches of the military including Navy, Army, Air Force, Marine Corps, Space Force, and Coast Guard.
From mission-critical operations to the functionality of advanced equipment and weaponry, every aspect of defense strategy hinges on optimal performance ā and temperature monitoring plays a pivotal role in achieving that goal.
Standard and customized temperature measuring solutions available to support application and MIL-SPEC requirements.
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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Products we supply to branches of the USA military include remote wireless SMART temperature monitoring solutions, thermometers / temperature indicators, calibration dry block equipment, pressure gauges, and accessories supplied.
Aircraft, Howitzer ammunition monitoring, marine engines, Army Corp of Engineers water temperature testing, and USDA thermometer accuracy testing are just a few of the segments and applications where Tel-Tru temperature instruments and equipment are utilized.
In the defense industry, advanced weaponry, ammunition, and equipment are subjected to extreme conditions, including high temperatures, freezing temperatures, humidity, and more. Without proper temperature monitoring measures, sensitive electronic components, munitions, and machinery can malfunction or degrade, jeopardizing mission objectives and putting personnel at risk. Temperature-controlled storage facilities, transportation systems, and operational environments are essential for safeguarding weapon systems, ensuring their readiness and effectiveness when called upon.
Military vehicles, from tanks to aircraft, rely on sophisticated systems and components that must function flawlessly in diverse climates and operational scenarios. Temperature fluctuations can impact engine performance, fuel efficiency, and the functionality of onboard electronics and sensors. By implementing temperature monitoring solutions, defense organizations can optimize vehicle performance, extend operational range, and enhance battlefield capabilities, giving them a strategic advantage in combat situations.
Temperature monitoring is vital for ensuring the health, safety, and comfort of military personnel. Whether deployed in arid deserts or frigid Arctic environments, troops require shelter, clothing, and provisions that shield them from extreme temperatures and maintain a habitable environment. Temperature-controlled barracks, field hospitals, and mobile shelters provide critical support for troops, enabling them to focus on their missions without being compromised by adverse weather conditions.
Environmental factors such as temperature, humidity, and exposure to harsh elements pose significant risks to defense operations and infrastructure. Corrosion, degradation, and structural damage can occur when equipment and facilities are not adequately protected from environmental stressors. Temperature-controlled maintenance facilities, storage depots, and protective coatings mitigate these risks, prolonging the lifespan of assets and reducing the need for costly repairs and replacements.
In the modern defense landscape, information and data are as critical as physical assets. Temperature monitoring is essential for protecting sensitive electronic systems, communications networks, and data storage facilities from overheating, moisture, and other environmental hazards. By maintaining stable temperatures within data centers, command centers, and communication hubs, defense organizations can safeguard vital information, maintain operational continuity, and thwart cyber threats that exploit vulnerabilities in temperature-sensitive systems.
The defense industry is subject to stringent standards or MIL-Spec and regulations that govern the design, manufacturing, and operation of military equipment and facilities. Temperature monitoring requirements are embedded in these standards to ensure reliability, interoperability, and safety across defense systems and infrastructure. By adhering to these standards and implementing best practices for temperature monitoring, defense contractors and military organizations can meet regulatory requirements, mitigate risks, and uphold the highest standards of performance and quality.