Metravi ST-9283B General Purpose Digital Thermometer

A. Product Overview

The Metravi ST-9283B is a compact general-purpose digital thermometer designed for contact temperature measurement. It uses an external probe with a 110 mm stainless steel sensing section and a 1-metre connecting cable, allowing the user to measure temperatures in containers, equipment, liquids, air ducts and other accessible locations.

The thermometer covers a wide temperature range from -50°C to 300°C, equivalent to -58°F to 572°F. It provides 0.1°C resolution in Celsius mode and 0.2°F resolution in Fahrenheit mode.

The instrument includes programmable high and low temperature alarm functions. These alarms help the user identify when a measured temperature rises above or falls below the selected limit.

Main Features

• Measuring range from -50°C to 300°C
• Fahrenheit range from -58°F to 572°F
• 110 mm stainless steel sensor
• External probe with approximately 1-metre cable
• High temperature alarm
• Low temperature alarm
• Data-hold function
• Celsius and Fahrenheit selection
• One-second sampling rate
• Low-battery indicator
• Protective plastic sleeve with clip
• Compact LCD display
• Portable, battery-operated design

The catalogue specifies an LCD size of 18 x 41 mm, a meter size of 64 x 100 x 18 mm and a weight of approximately 95 g including the battery.

B. Working Principle

The Metravi ST-9283B works through direct contact between its stainless steel probe and the material, surface, liquid or air being measured.

The probe contains a temperature-sensitive element whose electrical characteristics change according to temperature. When the sensing section is placed in contact with the target, the internal electronic circuit detects this change and converts it into a digital temperature value.

The measured value is then shown on the LCD in either degrees Celsius or degrees Fahrenheit.

For accurate measurement:

1. Place the stainless steel sensing section in proper contact with the target.
2. Allow sufficient time for the reading to stabilise.
3. Avoid measuring only with the plastic probe body.
4. Ensure that the selected high and low alarm limits are appropriate for the application.
5. Use the data-hold function when the display cannot be viewed during measurement.

The thermometer samples the temperature approximately once every second.

C. Why It Is Used

The Metravi ST-9283B is used when a physical probe is required to measure the temperature of a product, material, liquid, enclosed space or equipment component.

Unlike a non-contact infrared thermometer, a probe thermometer can measure temperature at the actual contact point or within a material, depending on how the probe is positioned.

It is useful for:

• Checking temperatures inside liquids and semi-solid materials
• Monitoring food preparation and storage temperatures
• Measuring air temperature inside ducts or enclosures
• Testing heating and cooling equipment
• Checking laboratory samples and process materials
• Monitoring temperature during maintenance inspections
• Identifying temperatures above or below predefined limits
• Recording stable readings using the data-hold function
• Measuring areas where the main display unit must remain away from the target
• Performing general-purpose contact temperature checks

The high and low alarm facility is particularly useful where the operator needs a warning when the temperature moves outside an acceptable range.

D. Suitable Buyers

The Metravi ST-9283B is suitable for:

• Food-processing companies
• Commercial kitchens and catering businesses
• Restaurant quality-control teams
• Laboratory technicians
• HVAC service technicians
• Refrigeration maintenance teams
• Industrial maintenance engineers
• Production supervisors
• Quality-control departments
• Educational laboratories
• Repair workshops
• Facility-management companies
• Equipment service contractors
• Cold-storage operators
• Warehouses handling temperature-sensitive materials
• General industrial users requiring a portable probe thermometer

Frequently Asked Questions

1. What is the temperature range of the Metravi ST-9283B?

The thermometer measures from -50°C to 300°C, equivalent to -58°F to 572°F.

2. Is the Metravi ST-9283B a contact thermometer?

Yes. It is a contact-type digital thermometer that uses an external stainless steel probe.

3. What is the length of the stainless steel sensor?

The stainless steel sensing section is approximately 110 mm long.

4. Does the thermometer have an external probe?

Yes. The catalogue specifies an external probe measuring approximately 198 mm overall, including a 110 mm stainless steel sensor, with a 1-metre connecting cable.

5. What is the accuracy of the Metravi ST-9283B?

From -50°C to 200°C, the specified accuracy is ±1°C. Above 200°C, the specified accuracy is ±2°C.

In Fahrenheit mode, the specified accuracy is ±2°F from -58°F to 392°F and ±4°F above 392°F.

6. What is the display resolution?

The resolution is 0.1°C in Celsius mode and 0.2°F in Fahrenheit mode.

7. Does it support both Celsius and Fahrenheit?

Yes. The user can select either degrees Celsius or degrees Fahrenheit.

8. Does it have high and low temperature alarms?

Yes. The ST-9283B includes adjustable high and low temperature alarm functions.

9. What is the purpose of the temperature alarm?

The alarm helps notify the user when the measured temperature exceeds the selected high limit or falls below the selected low limit.

10. Does the thermometer have a data-hold function?

Yes. The data-hold function allows the displayed reading to remain visible after measurement.

11. How frequently does it update the temperature reading?

The sampling rate is approximately one reading per second.

12. Can it be used for food temperature measurement?

It can be used for general contact temperature checks in food preparation. The probe should be properly cleaned before and after use, and the user should follow applicable hygiene and food-safety procedures.

13. Can it measure liquid temperature?

Yes. The stainless steel sensing portion can be placed into a compatible liquid for contact temperature measurement. The main meter body and cable connection should be kept away from unnecessary liquid exposure.

14. Can it measure surface temperature?

Yes, but the probe must make proper physical contact with the surface. A contact probe may respond more slowly on flat surfaces than when inserted into liquids or soft materials.

15. Can it be used for HVAC applications?

Yes. It can be used for general HVAC temperature checks, including air ducts, vents, equipment and service inspections, provided the probe is positioned correctly.

16. Is it suitable for continuous permanent monitoring?

The ST-9283B is primarily a portable handheld thermometer. It is more suitable for inspection and spot measurement than for permanent panel-mounted or continuous data-logging applications.

17. Does it record temperature history?

No data-logging or historical recording function is specified in the catalogue. The data-hold function only retains the current displayed reading.

18. What battery does it use?

The catalogue specifies one 1.5 V AAA battery.

19. Does it have a low-battery warning?

Yes. A low-battery indicator is included.

20. What accessories are supplied?

The standard accessories listed in the catalogue are the external probe, battery and manual card. A protective plastic sleeve with clip is also specified for the stainless steel probe.

21. Is the thermometer waterproof?

The catalogue does not specify a waterproof or IP protection rating. The meter should therefore be protected from water, excessive moisture and direct immersion.

22. Can it be used as a medical thermometer?

No. It is a general-purpose digital thermometer and is not specified as a clinical or medical device.