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  TEMPERATURE ACQUISITION SYSTEM
SMARTEC SMTAS08 with RS232



Acquisition system for 8 temperature sensors. Temperature logger max 8 sensors 
 
Picture SMT AS08 Temperature board

  Features

•The Smart Temperature Acquisition System (SMTAS08) is an 8 channel temperature measurement system. It was designed to get the best possible temperature measurement results with the SMT160-30 Smartec digital temperature sensors.

• The SMT160 is a three-terminal integrated temperature sensor with a duty-cycle-modulated square-wave output signal.

• The SMTAS08 is equipped with a Microchip PIC16F876 microcontroller.

• An RS232 interface chip offers external serial communication with the microcontroller.

• In turn each of the sensors is powered by a corresponding processor output. An analog multiplexer (74HC4051), which is controlled by the microcontroller, selects one of the eight sensor outputs by connecting it to the microcontroller input port. The input is then sampled to measure the dutycycle for this sensor (represented by two counter values, t1 and t2). This process is repeated for each of the sensors, after which the 8 values of t1 and t2 are sent to the RS232 port.

• No power supply is needed.

• Accuracy, TO18 model, 0.7 °C in the range from -30 °C to +100 °C and an accuracy of 1.2 °C from -45 to +130 °C.

• See SMTAS04 acquisition board if measurement of only 4 digital temperature sensors are required. The SMTAS04 is also available with USB interface.
  Picture software for SMTAS08

• A demo Labview , a Visual Basic program and the Logsmart program is available for download. All programs allow communication with the SMTAS08 board, ( Labview screen shot above). 

• The free LogSmart program writes the value of the temperature sensors to a log file. This can be a symbolic link file, tab file or excel file. (Logsmart screen shot below) 


The PIC processor assembly program listing used on the SMTAS08 is available for download on this page.

Download PDF-File

Manual for SMTAS08

ASM source code for PIC

HEX object code for PIC

Labview executable

Visual Basic application

SMTAS08 Datalogger executable

SMTAS08 Datalogger pdf manual

Part number & Price £

SMTAS08 £ 48.80   Call for OEM price


To order or request more information please contact sales@mms-e.com
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