DTM-305, DTM-307 Digital Thermometers Product ID: DTM-305, DTM-307


The thermometer is a device that measures temperature of using a variety of different principles. You can use a thermometer to tell the temperature outside or inside your house, inside ovens, even the temperature of your body if you have fever.

Tecpel provides you digital thermometers which are most widely used because of their convenience. Our thermometers can measure the wide temperature range from -50°C to 1,300°C. Furthermore, with digit LCD display , our thermometers can be more stylish and accurate than others.

It has been 400 years that Galileo invented the earliest thermometer . Now Tecpel give you K-type thermocouple which is inexpensive and, owing to its popularity, available in a wide variety of probes.

Our compact, contemporary thermometers are ideal for use in your home or office. They have outstanding temperature sensor that can make your measure more preciser.

No matter what your purpose, our thermometers are a quick, simple and effective way of getting temperature information. The quality thermometers of Tecpel can fit your needs.

Please also see our hot products as below:

DTM-305: Single input.

DTM-307: Dual input + 0.1 ° C resolution.

Company Web Site: http://www.tecpel.com


DTM-305 Specifications : 

Measurement Range:
-50°C to 1300°C (-58 °F to 2000 °F)
-50 °Cto 1000 °C:
±(0.3%rdg+1 °C)
1000°C  to 1300°C :
±(0.5%rdg+1 °C)

-58 °F to 2000 °F
±(0.3%rdg+2 °F)

Temperature Scale: Celsius of Fahrenheit user-selectable
Resolution:1 °C or 1 °F (or 0.1 °C of  0.1 °F)
Sensor:K­-type Thermocouple
Sampling rate: 3 times/per second
Power Requirement: 1 piece 9V battery
Dimensions: 5.8"x2.8"x1.5" (147x70x39mm) 
Weight: 13.8 oz(395g)

TPK-01x1,holster and owners manual. (DTM-305)

​TPK-01x2 ,holster and owners manual. (DTM-307)

  • DTM-305:
    • -50°C ~ 1,300°C (-58°F ~ 2,000°F).
    • 3 1/2 Digit LCD display.
    • K-type thermocouple.
    • Reading Hold °C of °F annunicators.
    • Single thermocouple input.
    • Switchable resolution 0.1°/1.0°;
    • 0.1°C resolution under 199°C
    • Front panel offset adjustment.
    • Automatic low battery indication.
    • Maximum record.
    • Overrange indication.
  • DTM-307:
    • -50°C ~ 1,300°C (-58°F ~ 2,000°F).
    • 3 1/2 Digit LCD display.
    • K-type thermocouple.
    • Function & unit sign display °C of °F annunciators.
    • Dual thermocouple input.
    • Differential temperature (T1-T2).
    • Front panel offset adjustment.
    • Maximum record.
    • Reading hold.
    • Automatic low battery indication
    • Overrange indication.
    • With 0.1°C resolution under 199°C
Specification DTM-305 DTM-307
Output Single Dual
Differential Temperautre (T1-T2) Non Yes




Q & A:

We are currently using your 305B thermometer, and I see the 'OL.'mark appears when I turn it on. This mark never disappears and I cannot use this device. What does this sign mean? and what should I do in order to eliminate this?


This could happen
1. The sensor got damaged.
You’d better try to change another new sensor to check if it works well.

2. If you measure temperature over 200 deg C,
the meter will show “OL” to let you know you should change
the resolution from “ O.1 “ to “ 1 “.

3.  Before the battery is consumed up, the meter will shall "OL"" too.
4. Finally, the worst possibility is that the meter gets damaged and should be returned back to our distributor for after-sales service.

Q & A:
We are facing a thermometer with a 0L display.
the terminal connection is correct.
I am using this model to measure 245degree temperature.
Is it due to over the limit of reading?
But I am sure that this thermometer can read more than this. Am I right?

Answer: You are right.
Please refer to the manual and you should switch its display decimal from o.1 to 1.0 because It is only 3 1/2 digits. 

Q& A: 
I would like to ask what is the problem when our thermometer is showing
negative reading instead of positive reading when we are checking a high
temperature solution.
Is there any way to troubleshoot this?

You probably use a flawed thermocouple probe
and insert the thermocouple 2 pin reversed.
The narrow pin is positive, broad one is negative.
Please check.