Specifications: Phocheck is a highly sensitive photoionization detector (pid) with a dynamic detecting range of between a few ppb and 10,000 ppm, making it the only instrument on the market able to detect voc's at low toxic thresholds and lower explosivity limits. Phocheck offers instant laboratory indicative measurements from a rugged, lightweight, handheld instrument. Allowing users to make an immediate contamination risk assessment and therefore take early corrective action Main features: -ppb to 10,000 ppm for ultimate detection capability. -real time graph display for an instant assessment of readings. -unique 'fence electrode' technology for humidity compensation. -rapid response and recovery for faster detection. -250+ preprogrammed gases and gas mixtures. -icon driven menu for the removal of language. Barriers. -intrinsically safe for use in flammable areas. -view stored reading graphically on screen for an overview of results. -333 hours of data logging (if readings are taken at one minute intervals). -health and safety mode for stel and twa monitoring. -data download via infrared port to a PC for analysis with easy to use software.