Gas analytical equipment

An electronic tool, designed to perform simultaneous temperature adjustment and stabilization for semiconductor gas sensors heating element and measurement of electric resistance of sensing element of a sensor. The unit allows the application of sensors with wide range of heating element parameters and sensing element resistances.

Metal oxide semiconductor gas sensor testing unit MS-12

Technical details

Number of sensors	Up to 12
Range of measurable resistance of sensing unit	0.1 kOhm – 10 GOhm
Sensing layer resistance measurement frequency	1-50 Hz, adjusted by software
Sensor heating element max operating voltage	5 V
Sensor heating element heating mode	Isothermal, programmable parameters: Temperature Duration of isothermal step Number of consecutive isothermal steps is unlimited.
Sensor heating element heating mode	Temperature modulation, programmable parameters: Minimum temperature, oC Maximum temperature, oC Heating rate, oC/sec Cooling rate, oC/sec Pause duration at min and max t, sec Number of cycles (unlimited)
Heating accuracy is achieved by	Pre-calibrated dependence voltage vs. heating element temperature OR PID regulation

Software features (included)

Input of heating element parameters
- Resistance
- Thermal coefficient of resistance
- Contacts of heating element resistance
Calibration of heating element temperature vs. applied voltage
Programming temperature vs. time profile for each one of 4 sensors individually
Adjustment of frequency of measurements of sensing element resistance
Visualization graphs of sensor temperature vs. time and resistance vs. time
Auto saving of collected data

The unit includes

Electrical block
Gastight sensor chamber
Connection cables for sensor chamber and electrical block
Power cable