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


Tel-Tru temperature sensing and monitoring instruments offer reliable solutions to ensure these processes operate within optimal temperature ranges, enhancing the efficiency and effectiveness of water and wastewater treatment facilities.
Temperature significantly influences the activity of bacteria in wastewater treatment systems. These bacteria thrive within a specific temperature range, typically between 68° and 95°F (20°–35°C). At lower temperatures, bacteria may slow down and at higher temperatures bacteria can become ineffective or cease to function, leading to system upsets. These upsets are characterized by deflocculation, where bacterial floc breaks apart, resulting in higher levels of total suspended solids (TSS) in the effluent.
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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Critical Monitoring: Temperature monitoring and control in water and wastewater treatment for managing bacterial activity and overall process efficiency.
Preventing Upsets: Proper temperature monitoring helps prevent bacterial stress and ensures effective treatment processes.
Industrial Design for Harsh Environments: Tel-Tru provides a range of temperature monitoring instruments, including RTDs, digital thermometers, and monitoring systems, to meet the diverse needs and environments in the water and wastewater industry.
Regulatory Compliance: Our accurate and reliable temperature monitoring ensures compliance with environmental regulations, preventing fines and penalties.
Accurate temperature monitoring is crucial because temperature changes impact other measurable parameters such as pH, conductivity, and dissolved oxygen. These changes affect water density, the ability to support aquatic life, and the capacity to absorb gases and nutrients. Higher temperatures can increase the solubility of certain chemicals and promote the growth of algae blooms, which consume oxygen and harm aquatic ecosystems.
Tel-Tru temperature monitoring instruments designed for the water and wastewater industry provide reliable, accurate, and real-time temperature measurements, ensuring optimal process conditions and regulatory compliance.