l The instrument can be equipped with dozens of kinds of sensors such as electrochemical, catalytic, non-dispersive infrared (NDIR) and photo-ionization detector (PID) sensors in order to meet users’ different demands;

l The instrument can not only display the concentration of a dangerous gas in real time but also calculate the TWA and STEL values of a toxic gas and display the results on the LCD as per corresponding instructions;

l The instrument possesses analog, digital and on/off signal outputs simultaneously;

l The ultra-large LCD screen is equipped with ultra-bright backlight, convenient for reading;

l  Its Protection Classification can exceed IP66;

Phosphine - PH3 

Hazard:                        Flammable      Will Explode LEL 1.79%

Classification:            Health                Extremely toxic

Synonyms:                 Celphos, Delicia, Detia, Hydrogen Phosphide, Phosphoretted Hydrogen, Phosphorus Trihydride

Exposure limits:       (OSHA) PEL\TWA: 3 ppm

                                    (ACGIH) STEL: 1 ppm

                                    (OSHA) IDLH: 50 ppm  

Industries:                 Chemical intermediate, doping agent, pesticide, fumigant   

Phosphine is a colorless, flammable highly toxic gas with a fishy or garlic-like odor. Phosphine acts on the central nervous system and lungs leading to pulmonary edema. Symptoms like faintness, vomiting, headache, tightness in the chest may appear rapidly after exposure. Even a short exposure to an acute amount of phosphine can lead to chronic neurological problems. It should also be recognized that phosphine is highly flammable and may spontaneously ignite in air or even explode when mixed with oxygen. Phosphine coming in contact with oxidizers, halogenated hydrocarbons, or even aluminum and copper may cause the same. It is for this reason that extreme care must be adhered to whenever working with or around phosphine.   

Effects of Various PH3 Levels  

Phosphine Level in PPM                   Resulting Conditions on Humans

.3                                                  OSHA Permissible Exposure Limit (PEL).

1                                                   OSHA Short Term Exposure Limit (STEL).

35                                                 Diarrhea, nausea, respiratory distress.

500                                               Lethal after 45 minutes.

2000                                             Lethal after 1-3 minutes.