The 2-channel digital thermometer for type K probes, code 963.916 Type TM916 Lutron, is a portable instrument designed for professional temperature measurements in industrial, maintenance and technical environments. Thanks to the dual input for two probes, it allows two different measuring points to be checked at the same time and compared using the T1, T2 and T1-T2 functions. This configuration is particularly useful when a single temperature value is not enough and the operator needs to evaluate the difference between two areas of the same system, between process inlet and outlet, between two components or between a surface and the surrounding environment.

The measuring range from -200 to +1370 °C allows the thermometer to be used in many professional applications, from low temperatures to high thermal process checks, depending on the type K probe used. The stated accuracy of ±1% + 1 °C makes it suitable for operational checks, maintenance inspections, thermal diagnostics and comparative tests in workshops, laboratories, production departments and technical systems. The °C/°F selection allows the instrument to adapt to different reading and documentation requirements.

The T1-T2 function is one of the main advantages of the product. It displays the difference between the two channels, making it easier to check thermal variations, heat losses, heat exchange, differences between supply and return, behaviour of two components under different loads or thermal stability of a system. In preventive maintenance this function can help identify anomalies before they become failures, while in quality control it supports verification of the thermal consistency of a process or component.

The thermometer includes MAX/MIN memory with recall, useful for recording the highest and lowest value detected during a test or inspection phase. This function is important when temperature changes over time and the operator needs to identify peaks, drops or significant differences without continuously observing the display. It can be useful on motors, bearings, moulds, heating elements, HVAC systems, production lines, technical panels, automotive components and machine tools.

The compact dimensions of 180 x 72 x 32 mm make the instrument practical for use in workshops, laboratories and maintenance departments. Power is supplied by an included 9 V battery, allowing portable and immediate use without connection to mains power. The product is supplied as a thermometer without probes, so the operator can separately select the type K probe most suitable for the task. This choice is important because measurement quality also depends on the probe used, its temperature range, sensor shape and type of contact with the surface or fluid to be checked.

In industrial environments, the thermometer can be used for preventive and corrective maintenance, machine tool checks, mechanical component verification, system testing, thermal process analysis, HVAC control, diagnostics on motors and gearboxes, automotive inspections and laboratory tests. In precision mechanics, temperature is a critical variable because it can affect expansion, dimensional stability, tolerances, fits, functional play and process repeatability. The instrument does not directly measure heights, transmission play or geometric errors, but it allows the operator to monitor a parameter that can contribute to dimensional variations and abnormal behaviour.

To obtain reliable measurements, compatible type K probes should be selected according to the required range and application, connected correctly to the two inputs, and the reading should be allowed to stabilise before interpretation. When comparing two points using T1-T2, it is important to use probes with similar characteristics in order to reduce differences caused by the sensor type and make the comparison more meaningful. The 2-channel digital thermometer code 963.916 is therefore a practical solution for technicians and professionals who need to measure and compare temperatures quickly, clearly and efficiently.