Tel : + 27 11 704 7001 / 5 / 8
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Impact Instruments was established in 2004 as an importer, agent and or distributor for several leading, international brands. Our territory covers South Africa and surrounding SADC countries, where agreements permit. With more than thirty years combined industry experience, we provide technical solutions and believe in not only selling equipment but ensuring that users are product and application trained. We guarantee high quality products and an outstanding level of service at all times. Should you not find what you are looking for, please contact us directly.

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For industrial and environmental worker safety in moisture and dust free applications, we offer the SENMA, enclosed in an ABS housing with membrane pump, solenoid valve and a range of electrochemical; NDIR; thermal conductivity; PID sensors, to choose from.
Gas sample is sucked through the membrane pump, into the unit for analysis, when the gas concentration exceeds the specified level, the relay outputs switch, close or alarm, as per user's setup.
       Technical data
Main features


  • Wide choice of electrochemical, NDIR, TCD and VOC sensors
  • Available for various ranges and resolutions
  • ABS housing
  • Miniature membrane pump
  • Solenoid valve for automatic ventilation and zeroing
  • PC program to adjust the analyser's settings and to view the results
  • Communication with PC via MODBUS 485 / RS485
  • Analogue output (0/4รท20mA)
  • Alarm (open drain) relay output
  • Optional display (4,5 digits)

General view of SENMA

 External view of SENMA

Internal view of SENMA
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