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;

Hazard:                                 Flam                  Will explode; LEL 4.0%

Classification:  Health       Extremely toxic

Oxidizing agent

Synonyms:                           Hydro sulfuric acid, sewer gas, sour gas, rotten egg smell

Exposure limits:                 (OSHA)     PEL\TWA: 20 ppm

(ACGIH)    STEL: 5 ppm / 15 min.

(OSHA)     IDLH: 300 ppm / 30 min

Industries:                            Oil and Gas industries (complete from drilling to refining), pulp and paper, and waste water treatment           

Hydrogen sulfide is a colorless gas that is known by its characteristic rotten egg like odor. It appears naturally as a byproduct of decomposition. One of the drawbacks to trusting the senses (olfactory) for protection against hydrogen sulfide is that prolonged exposure to the gas renders the sense of smell inoperative.

Hydrogen sulfide is a highly toxic gas. It reacts with the enzymes in the blood stream which inhibit cell respiration. in other words, high concentrations of hydrogen sulfide can shut off the lungs. Low concentration exposure to the gas can burn the respiratory tract and cause swelling around the eyes.

Effects of Various H2S Levels

Hydrogen Sulfide Level in PPM                   Resulting Conditions on Humans

        0.13                                                          Minimal perceptible odor 

        4.60                                                          Easily detected, moderate odor        

        10                                                             Beginning eye irritation.   

        27                                                             Strong, unpleasant odor, but not intolerable.   

        100                                                           Coughing, eye irritation, loss of sense of smell after 2 to 5 minutes.

        200-300                                                   Marked conjunctivitis (eye inflammation) and respiratory tract irritation after one hour of exposure  

        500-700                                                   Loss of consciousness, cessation (stopping or pausing) of respiration, and death. 

       1000-2000                                               Unconsciousness at once, with early cessation of respiration and death in a few minutes. Death may occur evenif

                                                                          individual is removed to fresh air at once.