CanRobo – CR1000

The CanRobo is a compact and robust air velocity measurement device that is deployed in underground roadways and is spaced at regular intervals. It provides a go or no-go visual indication for non-flameproof vehicles and personnel. The unit is pre-set for the minimum allowable airflow in the haulage. If the airflow drops below that threshold then the indication will change from green to red.


  • Inexpensive
  • Unit is compact and robust
  • Proven durability in operational area
  • Unit is splash proof
  • Easy to install and relatively maintenance free
  • Fixed position installation in underground roadways
  • LED Display is Green when air flow is above 0.5m/s and Red when air flow falls below 0.5m/s.
  • High visibility display (LED’s)
  • 220Vac Supply
  • Battery backup – 4 hours
  • Probe is housed in a removable jack-plug for ease of repair and calibration

Airwolf II – AW1000

The Airwolf II is a handheld air velocity sensor which has been tested and proven over a long duration in harsh South African underground mining conditions. It uses the Vortex Shedding principle to accurately measure air velocity. There are no moving parts making the instrument highly insensitive to dust, temperature and humidity. The unit comes with a leather pouch for easy belt attachment.


  • No calibration in field required
  • No moving parts
  • Accurate and easy to use
  • Display of real time airspeed
  • Display of average airspeed over a period (traversing)
  • Long life battery
  • Certified Intrinsically Safe (I.S.)
  • Range: 0.1 to 10 m/s

Stand-alone Sensors – SS1001/1002/1003

A range of single gas and airflow sensors certified to the Exia I Standard which can be optionally coupled to the mines existing backbone via the 4-20mA output signal.

Stand-alone Sensors available:

  • Methane (CH4)
  • Carbon Monoxide (CO)
  • Air Velocity (AV)
  • Most other gasses



  • Robust stainless steel IP65 rated enclosure
  • Ultra sonic airspeed measurement is not affected by dust, water vapour or temperature
  • Large auto scrolling segment LED display for local indication
  • Fire-patrol digital input with external push button.
  • Local audio visual alarm option
  • Calibration every six months (normal condition display)
  • Optional LCD display
  • Proven track record for more than 20 years


Interface Options:

  • Standard 4…20mA outputs per sensor
  • Exia loop isolators are available for I.S. Systems

TriSens – TRI3000

The TriSens is a rugged Intrinsically Safe Underground Environmental Monitoring device. It can be integrated into existing Industrial Ethernet and PLC networks to give a real-time status indication in the Control Room on SCADA. The sensor has fire-patrol facility to time stamp underground inspection readings.

The Standard TriSens accurately measures:

  • Airflow (AV)
  • Carbon Monoxide (CO)
  • Methane (CH4)



  • On-board Microcontroller for local Alarm Handling and Data Communication
  • Fire-patrol digital input with external push button
  • Node address configured on TriSens via push button
  • Robust IP65 rated enclosure
  • Ultra Sonic airspeed measurement is not affected by dust, water or temperature
  • Large Auto scrolling Liquid Crystal Display for local indication
  • One additional Analog Input is available (For Temperature or Alternative gas Measurement)
  • Local visual Alarm Status indication (Red/Green Flasher via the FSS3000*)
  • Audio visual alarm output for Guduza Exia Audio Visual Alarm
  • Power control output for Guduza Exia Relay Interface (Used to control switchgear)


The FSS3000 is a fail-safe, self-contained strobe that can be used to indicate the status of a device, e.g. the alarm status of an environmental monitor.


Interface Options:

  • Standard 4…20mA outputs per sensor, Exia l loop isolators are available for I.S. requirements.
  • FSK Data Communication via 1200Bd modem to NetFep Gateway*


NetFep Gateway
The NetFep Gateway provides Intrinsically Safe data communication to the TriSens utilizing very robust FSK modem technology. The outbound side of this Gateway provides data communication to Industrial Ethernet and PLC systems utilizing Modbus RTU (RS232/RS485) and Modbus TCP interfaces.

Dual Airflow Meter – DA1000

The Dual Airflow Meter is deployed as a fixed position unit for underground haulages and measures air velocity in two directions. The Vortex method of air speed detection offers the advantage of a once off calibration and is not sensitive to dust and moisture. The unit gives 2 x 4 – 20mA outputs for use with Data Acquisition Equipment such as PLC’s. Measuring airflow from 0-15m/s with an accuracy of ±5%.


  • Durable IP65 enclosures
  • Current loop output
  • Reverse voltage protection
  • Very reliable sensor heads
  • Vortex air measurement
  • Analog output (4 – 20mA)
  • Data Acquisition Equipment


Technical Information:

  • No calibration needed
  • Airflow range 0 to 15 m/s
  • Accuracy ± 5%
  • IP65 enclosure
  • 4 – 20mA output
  • Power consumption 3 watts
  • Input Power Required : 9 – 24Vdc


Related Products:

  • Handheld Airflow Meter (Airwolf II)
  • CH4 Single Sensor
  • CO Single Sensor
  • CO/CH4/Airflow Combined Unit (TriSens)

SafeMet – SM1000

The SafeMet Methane Standalone Sensor is part of the Guduza Econo Series range. This robust device is typically deployed in haulages, giving a go or no-go indication of methane levels above set point in the immediate area. The lens provides a very visible 360º green and red indication for below and above the set point measurement.The alarm levels is factory set according to the client’s required set point.


  • Relay output for control
  • Supply options
    • 12Vdc
    • 86 – 260VAC (Battery backup optional)



  • Easy to mount
  • Durable IP65 enclosures
  • Reverse voltage protection
  • Battery backup – 2 hours
  • Robust connectors
  • Very reliable sensor head
  • Solid state light source
  • Factory set trip point

SafeAir – SA1000

The SafeAir Standalone Sensor is part of the Guduza Econo Series range. This robust device is typically deployed in haulages, giving a go or no-go indication of air velocity in the immediate area.

Product Application:

  • Air velocity identification in underground roadways
  • Air velocity robot for the control of non-flameproof.
  • Vehicles in underground coal mining operations



  • Unit is compact and robust
  • Unit is splash proof
  • Battery back-up – 2 hours

Non I.S. Roadway Monitoring System – RMS1000

These sensors are Compact Environmental Monitoring units. These units can be integrated into SCADA/PLC networks to give a real time status indication in the control room as well as on the sensor itself.

Multiple Sensor Monitoring:

  • CH4: 0.0 to 5.0%
  • CO: 0 to 1000 ppm
  • Air Velocity: 0 to 10 m/s
  • Barometric Pressure: 300 to 1100 hPa



  • FSK data communication via 1200 Bd modem
  • Modbus RTU data communication via I.S. RS 485 interface



  • Local visual alarm indication by means of 360° LED
  • Large liquid crystal display for local indication
  • Fire-patrol Digital input
  • Robust IP65 enclosure
  • Airspeed measurement not affected by dust, water or temperature
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