Brandt Instruments Representing Otis Instruments Fixed Gas Detection System, OI-9900 WireFree Signal Repeater
                    Brandt Instruments Representing Otis Instruments

Otis Instruments Fixed Gas Detection Systems Logo

Otis Instruments OI-9900
Explosion-Proof WireFree™ Signal Repeater
Fixed Point Remote Gas Detection Systems

home otis instruments fixed point detectors OI-9900 OI-9900 WIreFree Repeater-Switch State Transmitter

Otis Instruments OI-9900 WireFree 32 Channel Signal Repeater

OI-9900 WireFree™ Signal Repeater
Explosion-Proof - DC Powered
Dual Antenna

The OI-9900 WireFree Repeater is a wireless device that receives messages from a remote sensor assembly and repeats the identical message to a receiver/monitor, allowing for greater distance between devices than with a sensor assembly/monitor setup alone.  The Repeater operates with 12-35 Volts DC, and is equipped with two antennas and two radios.

Application areas include pipelines, paper mills, waste management, food processing, manufacturing plants.

   Explosion-proof enclosure & antenna coupler for use in extreme            environments
   Glass lid for viewing the display
   Non-intrusive setup with MENU, ADD and SUB buttons
           ensures FASTER, CHEAPER and EASIER installation
   32 Channels - receives transmissions from up to 32 devices
   Individually configurable Low & High Alarm set-points per channel
   Reduces the need for costly wired systems
   Network settable,with potential to see all addresses on network
   Use any Otis WireFree receiver to complete the wireless system

   Radio Options:
              Gen II radio 900 MHz, 200mW

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


OI-9900-X-O WIreFree Signal Repeater
Switch State Transmitter
Explosion-Proof | DC Powered

Technical Specifications

Enclosure Otis-Blue explosion/flame proof
Display Screen 102x64 Resolution Graphical LCD Screen
Transflective (Sunlight Readable) with LED Backlight
Size & Weight 5.42 in. L x 6.03 in. W x 12.16 in. H
(Max. Dimensions w/ Attachments)
7.5 lbs
Interface Three push buttons (MENU, ADD, SUB); three corresponding magnetic, non-intrusive switches; non-intrusive calibration
Channels 32 (receives transmissions from up to 32 devices)
Network 52 Networks (GEN II 900 MHz Radios)
78 Networks (GEN II 2.4 GHz Radios)
255 Addresses per Network
Tamb Temperature Range -40° F to 140° F
-40° C to 60° C
Power Type Wired Power
Operating Voltage 12-35 Volts DC
Current Draw 150 mA Maximum at 24 Volts DC

Power Electromagnetic Interference (EMI) Filter

Fuses PTC (automatic resettable) Non end-user replaceable
Product Compatibility All Otis GEN II WireFree Sensors
WireFree Radio Options Two GEN II 900 MHz (200 mW) Radios or
Two GEN II 2.4 GHz (125 mW) Radios
Certifications Class I, Division 1, Groups C and D

Hardware - one year (limited)

Part Number Formula OI-9900-[Radio]-O
Otis WireFree Logo

Otis OI-9900 Repeater Data Sheet

   OI-9900 Manual

For additional accessories & options:  Accessories

CSA Certification Icon
ATEX Certification Icon
Otis Instruments OI-9900 WireFree Signal Repeater In the  Field  with OI-7010 Repeater on Pipeline

OI-9900 WireFree Signal Repeater Used in the Field


Otis Instruments OI-9900 WireFree Signal Repeater Diagram

OI-9900 WireFree Signal Repeater Diagram


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 
Phone: 225-673-6776
    Fax: 225-673-6725

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