HHMD Dual Channel Digital Handheld Display - Type J & K Thermocouple

The HHMD Dual Channel Digital Handheld Display is a versatile, high-accuracy temperature measurement instrument designed for engineers, technicians, and field professionals who require reliable thermocouple readings in a portable format. Supporting both Type K and Type J thermocouples, this handheld temperature meter delivers precise, real-time measurements across a wide temperature range.

With dual input capability, advanced measurement functions, and a large, easy-to-read LCD display, the HHMD is an ideal solution for applications ranging from industrial maintenance and HVAC diagnostics to laboratory testing and research environments.

Dual Channel Temperature Measurement

The HHMD features two thermocouple inputs, allowing users to monitor two independent temperature points simultaneously. This dual-channel functionality provides greater flexibility for comparing temperature readings or tracking changes across different locations.

Whether you’re measuring inlet and outlet temperatures, comparing two surfaces, or monitoring thermal gradients, the HHMD makes it easy to capture and analyze temperature data in real time.

The device also supports differential measurement with its T1–T2 function, enabling users to quickly determine the temperature difference between two probes—an essential feature for troubleshooting and performance analysis.

Compatible with Type K and Type J Thermocouples

The HHMD is designed to work with two of the most widely used thermocouple types:

• Type K thermocouples – ideal for high-temperature applications

• Type J thermocouples – commonly used in industrial and lower-temperature environments

Users can easily switch between thermocouple types, making the HHMD a flexible tool for a wide range of temperature measurement applications.

Temperature measurement ranges include:

• Type K: -328 to 2498°F (-200 to 1370°C)

• Type J: -328 to 1922°F (-200 to 1050°C)

This broad measurement capability ensures that the HHMD can handle everything from cryogenic testing to high-temperature industrial processes.

High Accuracy and Reliable Performance

Accuracy is critical in temperature measurement, and the HHMD delivers dependable results with:

• ±0.1% of full scale + 0.7°C accuracy (Type K & J)

This level of precision makes the HHMD suitable for both field diagnostics and controlled testing environments where reliable data is essential.

With a microprocessor sampling rate of one sample per second, the unit provides steady, real-time updates, allowing users to monitor temperature trends as they happen.

Large, Easy-to-Read LCD Display

The HHMD is equipped with a large, dual-line LCD display that makes it easy to view temperature readings at a glance.

• Primary display: 5 digits, 0.51-inch (13 mm) high

• Secondary display: 5 digits, 0.37-inch (9.5 mm) high

This dual display format allows users to simultaneously view both input channels or additional calculated values, improving efficiency during measurement and analysis.

The display updates once per second, providing clear and consistent readings in both stable and dynamic conditions.

Advanced Measurement Functions

The HHMD goes beyond basic temperature measurement with a suite of advanced functions designed to enhance usability and data analysis:

• Max/Min Recording – Track the highest and lowest temperatures recorded

• Average Function – Monitor average temperature over time

• T1–T2 Differential – Measure temperature differences between two inputs

• Data Hold – Freeze the display for easy reading and recording

These features make the HHMD a powerful diagnostic tool for identifying trends, troubleshooting systems, and capturing critical measurement data.

Portable, Battery-Powered Design

Designed for use in both field and laboratory environments, the HHMD is powered by a standard 9V battery, providing approximately 250 hours of operation under typical use.

Key portability features include:

• Lightweight design (approximately 6 ounces including battery)

• Compact size for easy handling and storage

• Long battery life for extended use without frequent replacements

This makes the HHMD an excellent choice for technicians who need a dependable, go-anywhere temperature measurement solution.

Simple Thermocouple Connectivity

The HHMD uses standard mini thermocouple connectors, allowing for quick and secure connection of probes. This industry-standard interface ensures compatibility with a wide range of thermocouple sensors and accessories.

Included with the unit are two Type K thermocouple test leads, allowing users to begin measuring immediately without additional equipment.

Durable Construction for Demanding Environments

Built from high-quality materials, the HHMD is designed to withstand the rigors of industrial and field use. It operates reliably in environments with:

• Temperatures from -4°F to +140°F (-20°C to +60°C)

• Up to 80% relative humidity (non-condensing)

Its durable construction ensures long-term performance even in challenging conditions.

Complete Kit for Immediate Use

The HHMD comes ready for operation right out of the box, including:

• (1) 9V battery

• (1) mesh carrying case

• (2) Type K thermocouple test leads

The included mesh carrying case provides convenient storage and transport, keeping the unit and accessories organized and protected.

Ideal Applications

The HHMD Dual Channel Thermocouple Display is suitable for a wide range of temperature measurement applications, including:

• HVAC system diagnostics

• Industrial process monitoring

• Equipment maintenance and troubleshooting

• Laboratory testing and research

• Electronics and component temperature measurement

• Field service and inspection

Its combination of portability, accuracy, and dual-channel capability makes it a valuable tool across multiple industries.

Why Choose the HHMD Dual Channel Thermocouple Display?

The HHMD stands out as a reliable and versatile handheld temperature meter due to its:

• Dual channel input for simultaneous measurements

• Compatibility with Type K and Type J thermocouples

• Wide temperature measurement range

• High accuracy and stable performance

• Advanced functions including Min, Max, Average, and differential measurement

• Large, easy-to-read LCD display

• Portable, battery-powered design

• Included accessories for immediate use

These features make the HHMD an excellent choice for professionals who need dependable temperature measurement in both field and laboratory environments.

Reliable Temperature Measurement Wherever You Need It

Accurate temperature data is essential for maintaining performance, efficiency, and safety across a wide range of applications. The HHMD Dual Channel Digital Handheld Display provides a convenient and reliable way to capture that data—anywhere, anytime.

Whether you’re troubleshooting equipment, verifying process conditions, or conducting research, the HHMD delivers the performance and flexibility you need to get the job done.