Metravi DTM-901 Dual Input Digital Thermometer

A. Product Overview

The Metravi DTM-901 is a dual-input digital thermometer developed for fast-response contact temperature measurement with laboratory-grade accuracy. Its two thermocouple inputs allow users to monitor two temperature points at the same time or compare the temperature difference between them.

The large backlit display can show T1, T2, T1 minus T2, maximum, minimum and average temperature readings. A relative-time clock records the timing of MAX, MIN and AVG events, helping users identify when important temperature changes occurred.

The thermometer supports both K-type and J-type thermocouples and provides readings in Celsius, Fahrenheit and Kelvin. Its electronic offset function helps compensate for thermocouple errors and improve overall measurement accuracy.

Main Features

• Two thermocouple inputs for simultaneous temperature measurement
• Compatible with K-type and J-type thermocouples
• T1, T2 and T1 minus T2 temperature display
• Maximum, minimum and average measurement functions
• Relative-time reference for recorded temperature events
• Electronic offset adjustment
• Large backlit digital display
• Celsius, Fahrenheit and Kelvin measurement units
• Automatic power-off for improved battery life
• 0.1-degree display resolution below 1000 degrees

Temperature Measurement Range

• K-type thermocouple: minus 200°C to 1372°C
• J-type thermocouple: minus 210°C to 1100°C
• Display resolution: 0.1°C, 0.1°F or 0.1 K below 1000 degrees and 1-degree resolution above 1000 degrees

B. Working Principle

The Metravi DTM-901 works by receiving electrical signals from connected K-type or J-type thermocouple probes. A thermocouple produces a small voltage based on the temperature difference between its measuring junction and reference junction.

The thermometer processes this signal and converts it into a temperature reading. When two probes are connected, the instrument can:

• Display the temperature measured by probe one as T1
• Display the temperature measured by probe two as T2
• Calculate and display the difference between T1 and T2
• Record maximum, minimum and average temperature values
• Apply an electronic offset to compensate for probe-related measurement errors

This dual-input operation allows users to compare two surfaces, environments, process points or equipment sections without using two separate thermometers.

C. Why the Metravi DTM-901 Is Used

The Metravi DTM-901 is used when accurate contact temperature measurement is required at one or two points. Its dual-channel design makes it particularly useful for temperature comparison, differential temperature testing and troubleshooting.

It can help users:

• Compare inlet and outlet temperatures
• Measure temperature differences across heating and cooling equipment
• Monitor two process points simultaneously
• Check the performance of refrigeration and HVAC systems
• Measure surface, liquid, air and equipment temperatures with a suitable thermocouple probe
• Identify maximum and minimum temperature changes
• Record average temperature during an inspection period
• Compensate for thermocouple measurement variations
• Carry out high-temperature measurements with compatible probes

The wide K-type and J-type temperature ranges make the thermometer suitable for applications involving both low-temperature refrigeration systems and high-temperature industrial processes.

D. Suitable Buyers

The Metravi DTM-901 Dual Input Digital Thermometer is suitable for:

• HVAC technicians
• Refrigeration service engineers
• Industrial maintenance professionals
• Laboratory technicians
• Quality-control departments
• Process-industry engineers
• Electrical and mechanical maintenance teams
• Heating-system technicians
• Boiler and furnace maintenance personnel
• Food-processing facilities
• Cold-storage operators
• Research and testing laboratories
• Equipment manufacturers
• Technical training institutes
• Industrial instrumentation dealers

Frequently Asked Questions

1. What is the Metravi DTM-901?

The Metravi DTM-901 is a portable dual-input contact thermometer that works with two K-type or J-type thermocouple sensors. It can measure two temperature points simultaneously and display their temperature difference.

2. Which thermocouple types are supported?

The DTM-901 supports K-type and J-type thermocouples.

3. What is the K-type thermocouple measurement range?

With a compatible K-type thermocouple, the thermometer has a specified range of minus 200°C to 1372°C.

4. What is the J-type thermocouple measurement range?

With a compatible J-type thermocouple, the thermometer has a specified range of minus 210°C to 1100°C.

5. Can it measure two temperatures simultaneously?

Yes. Two thermocouple probes can be connected to display T1 and T2 readings simultaneously.

6. What does T1 minus T2 mean?

T1 minus T2 represents the temperature difference between the first and second connected thermocouple probes. This function is useful for comparing inlet and outlet temperatures or two different process points.

7. Does the DTM-901 provide MAX, MIN and AVG readings?

Yes. It can display maximum, minimum and average temperature readings. It also provides a relative-time reference for these recorded events.

8. What is the electronic offset function?

The electronic offset function allows users to compensate for thermocouple errors, helping improve the overall accuracy of the measurement system.

9. Which temperature units are available?

The thermometer can display readings in Celsius, Fahrenheit and Kelvin.

10. Does the thermometer have a backlit display?

Yes. It has a large backlit display designed to improve visibility in low-light working environments.

11. Does it have an automatic power-off function?

Yes. The automatic power-off or sleep mode helps increase battery life when the thermometer is not being used.

12. What is the display resolution?

The specified resolution is 0.1°C, 0.1°F or 0.1 K for readings below 1000 degrees and 1-degree resolution for readings above 1000 degrees.

13. Is the thermocouple probe selection important?

Yes. The temperature range, response time, accuracy and application suitability depend partly on the connected thermocouple probe. Users should select a probe suitable for the surface, liquid, air or high-temperature application being measured.

14. Can it be used for HVAC and refrigeration work?

Yes. Its dual-input and differential-temperature functions make it suitable for checking temperature differences across air-conditioning, refrigeration, heat-exchange and cooling systems.

15. Can the Metravi DTM-901 measure liquid temperature?

Yes, provided a compatible immersion thermocouple probe suitable for the liquid and required temperature range is connected.