DTM-305C Temperature Meter Single input with type K bead thermocouple Product ID: DTM-305C

This is a professional temperature meter provided by Tecpel Co., Ltd, ideal for many circumstances which need precise manipulation. This specific device has a great capacity of measuring accurately, helping users to get the most correct data at once. Moreover, it's worth mentioning that the temperature meter is especially manufactured as a portable device, suitable for users to carry with, and more convenient to operate the measuring work.

Specializing in manufacturing high quality test and measurement equipments such as temperature meter, we are the leading and well-known Taiwanese manufacturer in this industry. We value customers’ needs most; therefore, we are committed to providing our customers with high quality, best price products with prompt services.

Here, we are glad to present you our best products. If you have any further questions about this specific Temperature Meter, please send your inquiry to us. We're willing to provide any help as far as we could do!


Highly accurate thermometer with 0.1% basic accuracy.
Large display for easy to read. 
Thermocouple offset adjust. 
Robust protective Holster. 

Auto-Power Off. Display back-light. 
MIN/MAX/AVG/REL/HOLD functions. 

Wide measuring ranges suit versatile applications. 



Display: 3½ digit liquid crystal display (LCD) with a maximum reading of 1999. 
Polarity: Automatic, positive implied, negative polarity indication.

Low battery indication: The “ battery sign” is displayed when the battery voltage drops below the operating level.
Measurement rate: 2.5 times/second.

Operating environment: 0°C to 50°C at < 70% RH.
Storage temperature: -20°C to 60°C, 0 to 80% R.H. with battery removed from meter.

Accuracy: Stated accuracy at 23°C±5°C,
Battery: 1.5Vx4pcs AAA size.
Dimensions: 160mm(H) x 83mm(W) x 38mm(D).  
Weight: approx. 235g including batteries.  

Range: -200°C to 1372°C, -328°F to 1999°F  
±(0.1% rdg+1°C) on -60°C to 1372°C
±(0.1% rdg+2°C) on -60°C to -200°C
±(0.1% rdg+2°F) on -76°F to 1999°F
±(0.1% rdg+4°F) on -76°F to -328°F K-type(Chromic -Alum) 

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.