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Hazard Evaluation And Response Trigger

HEART is a proactive personal occupational hygiene exposure monitoring system intended to record, store and analyze physiological and environmental data of each employee during his/her working shift.

Product Detail:


  • Recorded data are time and date stamped.
  • Synchronised real time video recording which can estimate the location of the user when an event occurred
  • Video and audio capability (when self initiated)

 Sensor Pack

  •  Portable battery operated device fitted onto a harness
  • Monitors the immediate working environment by periodic sampling for various parameters.
  • Data is recorded onto a rugged non-volatile storage device
  • Capacity of storing samples covering the entire working  shift of at least eight to ten hours.
  • Exposure warnings are displayed on a LCD screen on the sensor pack, with an audio alarm warning the user.

 Central Management System (CMS)

  •  After each shift, all the data captured on the sensor pack and / or camera will  be downloaded to a CMS database.
  • The CMS will analyse the data and immediately flag any deviations or  dangerous conditions

 HEART Currently Measures

  •  Environmental Noise Levels
  • Environmental Temperature
  • Barometric Air Pressure
  • Relative Humidity
  • Physical Vibration
  • Body Temperature Sensor
  • Heart Rate Monitor Sensor
  • Video & Audio
  • Gases – refer to Gas sensor table

 Durability Features

  •  Sensor Pack: 4 foot drop approved
  • Sealed All-weather Design
  • Rain, Spill, Dust and Vibration Resistant [IP65]

 Typical Applications

  •  Assist in Human Resource Development & Training
  • Visual Footage of Work Area Conditions and Work Practices
  • Built-in Alarms/Early Warning Systems
  • Only Record Voice When Self Initiated
  • Improved Risk Assessment Compilation Method

 Occupational Hygiene and Safety

  •  Visual footage to assist with Investigations, Task Observations, Inspections, Training and Lessons Learned Library, etc.
  • Direct Correlation between Work Area Conditions and Exposures
  • Early warning Capability to Enable Pro-active Focused Detailed Root Cause Investigations
  • Enable Pro-active Informed Management Decisions
  • Reductions in Diagnostic Equipment and Data Analysis Costs
  • Leading Indicators

 Environmental Measurement

 Gas Sensor Table


Nitrogen Dioxide No2 ppm 0 20
Nitric Oxide NO ppm 0 250
(Nitrogen Monoxide)        
Carbon Monoxide CO ppm 5000 10000
Carbon Dioxide Co2 ppm/% 5000 100
VOC VOC ppm 0 300
Flammable Gas (Methane) Ch4 % 0 100
Sulphur Dioxide So2 ppm 0 2000
Nitrous Oxide N2O ppm 0 1000
Ammonia Nh3 ppm 100 5000
Phosphine Ph3 ppm 0 10
Hydrogen Cyanide HCN ppm 0 100
Ethylene Oxide C2H4O ppm 0 100
Silane SiH4 ppm 0 50
Hydrogen Fluoride HF ppm 0 10
Oxygen O2 % 0 30
Hydrogen Sulphide H2S ppm 0 100
Chlorine CL2 ppm 0 20

 Physiological Measurement

The heart rate monitor sensor is fitted onto a belt which the user wears around his/her chest. Data is communicated to the sensor pack through radio frequency wireless communication.

The body temperature sensor is used to measure the employee’s skin temperature. This sensor is housed in the same body belt as the heart rate sensor, which is worn around the user’s chest. Body temperature is measured from 30oC to 45oC with 1 decimal point precision. The sensor has a single zone of measurement.

 Situational Measurements

 Private Area Beacons

The Sensor pack has a Zigbee PRO compliant RF module built in. Video and audio in a private areas such as a bathroom or wash house are blanked out.


A mobile camera records all the video and audio for an eight hour shift. This is synchronized with the data on the sensor pack providing an audiovisual cue of where an overexposure has taken place. By default the audio recording is not presented due to privacy constraints.