Metravi HT-12 Temperature and Humidity Meter with External Probe

A. Product Overview

The Metravi HT-12 is a compact digital temperature and humidity monitoring instrument suitable for routine environmental observation. Its large LCD displays indoor temperature, indoor relative humidity and the temperature detected by the external probe.

The meter measures temperature from minus 10°C to 50°C and relative humidity from 20 percent RH to 95 percent RH. It records minimum and maximum temperature and humidity values, helping users review changes that occurred during a monitoring period. The display also provides a comfort-level indication for quick assessment of indoor environmental conditions.

Additional functions include selectable Celsius and Fahrenheit units, a 12-hour or 24-hour clock format and an alarm clock with an alarm duration of up to 60 seconds. The device operates using one 1.5 V AAA battery.

Key Features

• Simultaneous indoor temperature and humidity measurement
• External probe for temperature measurement at another location
• Temperature measuring range from minus 10°C to 50°C
• Humidity measuring range from 20 percent RH to 95 percent RH
• Min and Max temperature and humidity recording
• Comfort-level indication
• Selectable Celsius and Fahrenheit units
• Selectable 12-hour and 24-hour clock
• Alarm clock function
• Large and easy-to-read digital display
• Temperature and humidity readings updated every 10 seconds

B. Working Principle

The Metravi HT-12 uses its internal sensing elements to measure the temperature and relative humidity around the main display unit. At the same time, the connected external probe measures temperature at a second location.

The meter processes the sensor signals and converts them into digital values shown on the LCD. The readings are sampled approximately every 10 seconds, allowing the display to update regularly as environmental conditions change.

The internal memory compares each new reading with previously measured values and stores the minimum and maximum temperature and humidity readings. The comfort-level indicator uses the measured indoor conditions to provide a simple visual indication of the surrounding environment.

The external probe can be placed inside a cabinet, enclosure, storage area or another nearby location while the main unit remains positioned where its display can be read conveniently.

C. Why It Is Used

The Metravi HT-12 is used when temperature and humidity conditions need to be checked quickly and continuously without installing a complex monitoring system.

Monitoring temperature and humidity can help users identify uncomfortable, unsuitable or changing environmental conditions. Excessive humidity may contribute to condensation, moisture accumulation and damage to stored materials, while low humidity may affect comfort and certain sensitive products.

Its external temperature probe is useful when the temperature inside one location must be observed while the display remains outside. The Min and Max function also helps users determine whether temperature or humidity crossed an expected level during the monitoring period.

The Metravi HT-12 is particularly useful for:

• Checking room temperature and humidity
• Comparing indoor temperature with the temperature at another location
• Monitoring cabinets, storage areas and equipment enclosures
• Reviewing minimum and maximum environmental readings
• Observing humidity conditions in offices, rooms and workspaces
• Monitoring temperature-sensitive materials within the instrument’s measuring range
• Maintaining comfortable indoor environmental conditions

The HT-12 is an indication and monitoring device. It does not automatically control cooling, heating, humidification or dehumidification equipment.

D. Suitable Buyers

Homes and Residential Users

Homeowners can use the HT-12 to monitor room temperature and humidity and assess whether indoor conditions are comfortable.

Offices and Commercial Spaces

Offices, shops, reception areas and commercial establishments can use the meter for routine indoor climate monitoring.

Warehouses and Storage Facilities

Warehouse operators can use it to observe temperature and humidity conditions in storage areas where materials may be affected by heat or moisture.

Laboratories and Educational Institutions

Laboratories, classrooms and training centres can use the meter for basic environmental measurement and demonstration purposes.

Greenhouses and Plant-Growing Areas

The device can help users observe temperature and humidity conditions around plants, provided the environment remains within the instrument’s specified range.

Equipment and Electrical Panel Users

The external probe can be positioned inside a cabinet or enclosure to observe temperature while the main display remains accessible outside.

Retailers and Instrument Dealers

Industrial instrument suppliers, electrical dealers, laboratory equipment sellers and online retailers can offer the HT-12 to customers requiring a compact temperature and humidity monitoring solution.

Frequently Asked Questions

1. What does the Metravi HT-12 measure?

The Metravi HT-12 measures indoor temperature, indoor relative humidity and temperature at another location through its external wired probe.

2. What is the temperature range of the Metravi HT-12?

The specified temperature measuring range is from minus 10°C to 50°C.

3. What is the humidity range of the HT-12?

The meter measures relative humidity from 20 percent RH to 95 percent RH.

4. What is the temperature resolution?

The temperature resolution is 1°C.

5. What is the humidity resolution?

The humidity resolution is 1 percent RH.

6. What is the temperature accuracy?

The temperature accuracy is within 1°C from 0°C to 40°C. Outside this range, the specified accuracy is within 2°C.

7. What is the humidity accuracy?

The humidity accuracy is within 5 percent RH between 40 percent RH and 80 percent RH. Outside this humidity range, the specified accuracy is within 8 percent RH.

8. Does the Metravi HT-12 include an external probe?

Yes. The HT-12 includes an external wired temperature probe for measuring temperature at a second location.

9. Can it measure humidity through the external probe?

No. The external probe is intended for temperature measurement. Humidity is measured around the main display unit.

10. Can indoor and external temperature be displayed simultaneously?

Yes. The HT-12 is designed to show indoor temperature and humidity along with the temperature measured by the external probe.

11. Does it record minimum and maximum readings?

Yes. It records minimum and maximum temperature and humidity values for convenient review.

12. Does the HT-12 have a comfort-level indicator?

Yes. The display includes a comfort-level indication to provide a quick visual reference for indoor environmental conditions.

13. Can the temperature unit be changed?

Yes. Users can select either Celsius or Fahrenheit.

14. Does the meter have a clock and alarm?

Yes. It has a selectable 12-hour or 24-hour clock and an alarm clock function. The alarm can sound for up to 60 seconds.

15. How frequently are the readings updated?

The specified sampling frequency is approximately once every 10 seconds.

16. What battery does the Metravi HT-12 use?

The meter operates using one 1.5 V AAA battery.

17. Can it be used inside a refrigerator?

The external probe may be used for temperature observation when the expected temperature remains within the specified range of minus 10°C to 50°C. It is not suitable for ultra-low-temperature or deep-freezer applications below minus 10°C.

18. Is the Metravi HT-12 a data logger?

No. It records Min and Max values but does not provide time-stamped data logging, computer connectivity or downloadable reports.

19. Can the HT-12 control a heater, cooler or humidifier?

No. It is a monitoring and display instrument and does not provide relay outputs for automatic equipment control.

20. Where can the Metravi HT-12 be used?

It can be used in homes, offices, shops, laboratories, warehouses, classrooms, greenhouses, storage areas and equipment cabinets where basic temperature and humidity monitoring is required.