| 4-20 IQ INTELLIGENTTRANSMITTER  | 
                      
                    
                    
                    
 The 
                    model 4-20 IQ is a microprocessor based intelligent sensor 
                    transmitter. It comes equipped with a digital display which 
                    provides a local reading of the gas concentration. Operating 
                    on 14-24 VDC power, it provides a linear 4-20 mA output proportional 
                    to the gas concentration, and is housed in an explosion-proof 
                    casing. The 4-20 IQ has been UL Classified and CSA Approved 
                    Class I, Div. 1, Groups B, C, and D. The 4-20 IQ can operate 
                    as a stand-alone instrument, or it can be used with an IST 
                    control unit to provide control room readings and alarm relays. 
                    
The 
                      4-20 IQ come equipped with an automated calibration feature 
                      which allows the unit to be calibrated without manually 
                      adjusting any potentiometers. Just apply gas and the 4-20 
                      IQ will do the rest. It couldn't be easier! Interfacing 
                      with the 4-20 IQ is accomplished by using a magnetic wand 
                      to activate magnetic switches located on the front panel. 
                      Thus, all functions can be performed with removing any covers, 
                      meaning there's no need to declassify an area being monitored. 
                      The 4-20 IQ can be used with any of IST's sensor technologies: 
                      infra-red (IR), solid state, catalytic bead, or electrochemical.