Brandt Instruments Representing Otis Instruments Fixed Gas Detection System, OI-7500 WireFree 32-Channel Explosion-Proof Monitor for Fixed Gas Detection System
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Otis Instruments Fixed Gas Detection Systems Logo

Otis Instruments OI-7500
WireFree™ 32-Channel Explosion Proof Monitor
Fixed Point Remote Gas Detection Systems



home otis instruments fixed point detectors OI-7500 OI-7500 WIreFree 32-Channel Explosion-Proof Monitor

Otis Instruments OI-7500 WireFree Explosion Proof 32-Channel Monitor

OI-7500 WireFree™ 32-Channel Monitor
Explosion-Proof with Battery Power Option

The OI-7500 is a self contained WireFree explosion-proof 32-Channel self contained monitor designed for use in conjunction with Otis Instruments Gen II WireFree Remote Sensor Assemblies.  The OI-7500 features 3 relays, and can monitor up to 32 WireFree sensors.

 

   Explosion and weather proof enclosure
   Glass lid for viewing the display
   Monitors up to 32 individual WireFree sensor assemblies
   Continuous scanning to monitor all channels
   Non-intrusive setup with MENU, ADD and SUB buttons
   Ability for each relay to be latched or non-latched
   Ability to disable alarm relays
   AC or DC power-in option
   Easy radio interface with Otis remote WireFree sensors 
   Rapid response and clearing time

   Radio Options:
               Gen II radio 900 MHz, 200mW

               (2.4 GHz ISM, 100mW available for international use)

                                                                                     

OI-7500 WireFree 32-Channel Monitor
Explosion-Proof & Battery Power Option

Technical Specifications

Enclosure
Adalet Class I, Div. 1
Size 7 " x 6" x 6"
Display Graphical LCD, sunlight readable (transflective), LED back-light, 160x104 pixel resolution
Channels

32 Channels

Operating Temperature -30° F to 70° C
Relays Three dry-contact with 4 Amp fuses; three individually confirgurable set-points
Enclosure Certifications Class I, Div. 1
RF Connection Class 1, Div 1; external N Female connector
Power Connection Phoenix-like screw terminal
Supply Voltage 12-35 VDC or 120/240 Volts VAC
Current Draw 275mA at 24 VDC (monitor only); 6.6 Watts Max
Radio Options 2.4 GHz ISM, 100mW OR 900 MHz, 200mW
Warranty

Hardware: One year (limited)

Otis WireFree Logo

Otis OI-7500 Brochure

   OI-7500 Manual

For additional accessories & options:  Accessories

CSA Certification Icon
ATEX Certification Icon
Otis Instruments OI-7500 WireFree 32-Channel Explosion Proof Monitor Diagram

OI-7500 WireFree 32-Channel Explosion Proof Monitor Diagram

Otis Instruments Replacement Gas Sensors
For Wired or WireFree™ Remote Sensor Assemblies

Part # Description Range Resolution
Accuracy
OI-254-O2 O2, Oxygen 0 - 25% 0.1%
± 2%
OI-120-NP-17SHM LEL, Combustible Gas
(Catalytic Bead) (OI-6000 only)
0 - 100% LEL 1.0% Increments
±1%
OI-140-NP-IR-LEL LEL, Combustible Gas (Infrared)
(OI_6000 only)
0 - 100% LEL 1.0% Increments
± 2%
OI-254-CO CO, Carbon Monoxide 0 - 999 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-140-IR-CO2 CO2, Carbon Dioxide
(OI-6000 only)
0 - 5% 0.1 ppm
± 2%
OI-254-H2S H2S,  Hydrogen Sulfide 0 - 100 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-H2S-2K H2S, Hydrogen Sulfide (Ext.Temp) 0 - 100 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-NH3 NH3, Ammonia 0 - 100 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-NH3A NH3, Ammonia (Ext) 0 - 1000 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-Cl2 Cl2, Chlorine 0 - 10 ppm 0.1 ppm
± 5%
OI-254-F2 F2, Florine 0-1 ppm 0.01 ppm
± 5%
OI-254-CH2O CH2O, Formaldeyde 0-10 ppm 0.01 ppm
± 2%
OI-254-H2 H2, Hydrogen 0- 4% 0.1 ppm
± 10%
OI-254-HCl HCN, Hydrogen Chloride 0- 30 ppm 0.1 ppm
± 5%
OI-254-HCN HCN, Hydrogen Cyanide 0- 30 ppm 0.1 ppm
± 5%
OI-254-HF HF, Hydrogen Floride 0 - 10 ppm 0.1 ppm
± 10%
OI-254-NO2 NO2, Nitrogen Dioxide 0-50 ppm 0.1 ppm
± 5%
OI-254-O3 O3, Ozone 0-100 ppm .1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-SO2 SO2, Sulfur Dioxide 0 - 20ppm .1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-PH3 PH3, Phosphine 0 - 20 ppm 0.1 ppm
± 2%
OI-254-PID-A1 PID, Photo Ionization Detector for volatile organic compounds (VOCs) (OI-6000 only) 10, 20 or 50 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-AH PID, Photo Ionization Detector for volatile organic compounds (VOCs) (OI-6000 only)

1000 or 2000 ppm

0.1 to 10 ppm, 1 ppm thereafter
± 3%


Note: Other gases and ranges available
. Contact us for additional information

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WARNING! Otis Instruments equipment should only be used in conjunction with the manufacturer's instructions.
Failure to follow such instructions could result in serious injury or fatalities.

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Brandt Instruments, Inc. 
    18568 Oak Grove Parkway 
    Prairieville, LA  70769 
1-800-337-6291  
Phone: 225-673-6776
    Fax: 225-673-6725
 

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