Digital Thermo Hygrometer - DTM-303A

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500.00 Grams
Minimum Purchase:
1 unit


TECPEL Digital Temperature humidity meter - DTM-303A

Dual row display, with 3 meters extension wire with sensor, Accurate and Reliable


A thermometer measures the temperature of the environment or material that we are operating on. A Hygro thermometer is a device that measures both temperature and relative humidity. Two means help the thermometer to display the signal. First, the digital sensor in infrared models, and secondly the converter that shows the numbers.

DTM-303A Hygro-Thermometer is a multi-functional hygrometer with the features of measuring indoor humidity, indoor/outdoor temperature (℃,℉), max/min temperature and humidity recalling (℃,℉), comfortable and uncomfortable index, and alarm clock function with snooze.

This Hygro thermometer provides:

  • Easy to read jumbo display
  • Comfortable and uncomfortable index (comfort/warm/cool)
  • Temperature unit °F/°C selectable
  • Maximum and minimum (°F/°C) temperature and humidity Memory recalling
  • Alarm/snooze set
  • Dual row display
  • 3 meters’ extension wire with sensor
  • 2 x 1.5 volt ""AAA"" sized or equivalent batteries

Measurement range:

The DTM-303A measures temperature at -50...+70°C or -58...+158°F , it also could measure relative humidity in 20%...100%RH range.


This hygro thermometer features temperature accuracy of 1°C or 1.8°F in the temperature range of -20...+70°C or -4...+158°F, but the accuracy outside of this range would be more than 1°C or 1.8°F. Humidity accuracy of the DTM-303A is 3% RH in the range of 30...70%RH and outside of this range the accuracy is 5% RH.


Resolution of a sensor is the smallest difference that it could measure. For this thermometer, resolution is 0.1° for whole temperature range, and 0.1%RH for whole Humidity range.


Here is important points you need to know about the DTM-303A operating bottoms, and indictors:

  • On/Off: Press once to switch on thermometer and press again to switch off. "Warm", “comfort" or "cool" sign appears at appropriate temperature and humidity.
  • °F/°C: Press °F/°C to select desirable temperature unit.
  • Max/min: Press once to recall maximum temperature and humidity tested. Max sign shows on the display. Press again to recall minimum temperature and humidity tested. Min sign shows on the display. Unit restores to real time mode automatically after 5 seconds.
  • In/Out: Press once to display outdoor measurement. "Out" sign shows on the display. Press again to display indoor measurement. "In" sign shows on the display.
  • Low battery indicator: Replace new battery when the low battery indicator appears on the screen.


Series Information

Tecpel Co. Ltd. has over 20 years of experience in the Test and Measurement market. They have set up over 50 country distributors worldwide. Their products are exported to Europe mainly. The confidence they have in their products is reflected in their one-year warranty.

Their product lines include power supplies, oscilloscopes, electronics & electrical meters and testers, Thermometer, sound level meters, etc.

About Tecpel temperature humidity meters:

Tecpel is regarded as one of the leading Taiwanese manufactures of high quality test and measurements, which provide different types of temperature humidity meters:

  • TRH-3351: Air quality indicator, CO2, temperature and humidity monitor
  • TRH-3308A, TRH-3358A: Temperature humidity CO2 meter LED monitor with data logger
  • TR-31, TR-32: Temperature Logger TR-31 / Temperature humidity logger TR-32
  • DTM-20: Hygro Thermometer with audio alarm features
  • DTM-301H: Large Display Thermometer / Hygrometer
  • DTM-302: Hygro Thermometer
  • DTM-303A: Hygro Thermometer
  • DTM-303B: Hygro Thermometer, Temperature and humidity meter for incubator
  • DTM-303H: Hygro Thermometer with alarm clock
  • DTM-311A: Digital Indoor Outdoor Thermometer with beeper alarm
  • DTM-320: Temperature and relative humidity meter
  • DTM-321, DTM-322: Temperature and humidity meter
  • DTM-323: Digital Hygro Thermometer
  • DTM-550: Highly Accurate Hygrometer / Humidity thermometer
  • TR-71nw, TR-72nw, TR-72nw-S: T & D wired LAN temperature and humidity data logger
  • TR-74Ui: Accumulating Light, humidity and temperature data logger
  • TR-71U, TR-72U, TR-73U: T & D Thermo  / Barometric pressure recorder
  • TR-76Ui: Temperature, humidity and CO2 Data Logger
  • TMM-590: Moisture Meter
  • TR-77Ui: Temperature and humidity data logger
  • ZG-106: CO2 Monitor


You may be interested to see this product's catalog. If so, please click to view the DTM-303A datasheet.
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Warranty Information

One-Year Warranty
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Additional Information

Temperature measurement range:
-50...+70°C or -58...+158°F
Humidity measurement range:
Temperature Accuracy:
1°C or 1.8°F in the range of -20...+70°C or 4...+158°F, otherwise more than 1°C or 1.8°F
Humidity Accuracy:
3%RH in the range of 30...70%RH, otherwise 5%RH
Temperature Resolution:
Humidity Resolution:
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