TM is a cheap RS232 serial thermometer with measuring range from -55°C to +125°C. It communicates in a simple ASCII format.
Digital sensor TM can very easily measure temperatures and transmit those measured-out values to a PC. As a transfer protocol TM uses a simple ASCII format so there is no conversion needed (Output directly in degrees celsius °C). It is connected to the PC via a COM port (RS232).
Features of simple serial thermometer
- Measures temperatures from -55°C to +125°C, 0,1°C resolution
- Output is in ASCII format in °C, no conversion needed.
- Connects to a serial port (COM)
- Port powered
- Wix software included (freeware)
- Easily integrated in own applications (DLLs, souce codes and communication description provided freely)
Usage
- Temperature measurement for living areas, warehouses and manufacturing areas.
Sensor cable length
Standard cable length is 3m. Other lengths available on request. Maximum cabnle length is 20m
Tips
- Don't have serial port on your PC? Try our USB thermometer.
- Looking for Ethernet thermometer?
- If you need to measure several distant locations, you can use similar sensors called TQS3.
Thermometer function description
TM is connected and powered from a serial port (COM). Once the DTR signal is activated, TM measures temperature and sends it to the PC in ASCII format as a string. When DTR is active continuously, TM sends the current temperature every 10s. This is indicated by an LED on the RS232 connector. Standard sensor is fo atmospheric measurements only.
Connections
TM only has on serial connector (CANON9, DSub9) that is to be connected directly to a PC.
Used signals are in the table:
| pin | RS232 signal |
Function |
| 2 | RXD | Recieves data from the sensor - measured temperature |
| 4 | DTR | Powers and controls the sensor |
| 5 | GND | Signal grounding |
Thermometer communication protocol
TM can be easily used with a software (WIX), custom software or any terminal (TeraTerm, Telix, hyperterminal). Customer made softweare is another option as the communication protocol is very simple.
| Input (from PC to TM) |
Function | Output (from TM to PC) |
| DTR signal active | Power on, measurement | °C> Example: +025.3C |
| DTR signal continuously active | Periodic sending of a current temperature |
TM service ... a Windows service to view TM or TMU temperatures
TMservice is a resident service for Windows OS, which can be used to view TMU or TM thermometers. It can watch set-up thresholds, store measured-out values and inform users about the sensor. More info...
File:
| TM Datasheet |
68.09 KB |  |
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TQS4 O - Outdoor RS485 ThermometerDescriptionA digital thermometer for RS485; outdoor design with IP65 protection. It measures temperatures in the range from -55 ° C to +125 ° C and the measured value is sent in degrees Celsius. The thermometer has very low consumption and communicates via Spinel or MODBUS protocols. The TQS3 intelligent temperature sensor can be connected to other modules by a single bus, which can be up to 1200 m long. New feature: The users can now switch between the Spinel and Modbus RTU communication protocols using ModbusConfigurator software. 59,04 EUR (20 % VAT incl. excl. Shipping costs) |
This Product was added to our catalogue on Tuesday 12 August, 2014.
