OI-6900 Non-Explosion Proof Dual Battery Powered WireFree Sensor Assembly


The Otis Instruments WireFree Non-Explosion-Proof OI-6900 Series Ambient Air Toxic Gas Detector is a wireless, dual battery -powered assembly that uses an electrochemical sensor element to detect a variety of toxic gases. Magnetic switches allow for non-intrusive calibration and system setup while in the field. The OI-6900 continuously monitors the gas level of the surrounding environment and reports once a minute, the reporting rate will increase to once every five seconds when the detected gas is above the Background Gas Set-point. This set-point is adjustable to account for sites that may have a constant low level of gas always present. The display screen always shows the present gas concentration.

Part Number Formula:OI-6900-[Gas Type]-[Radio Option]-C-2B

See Related: OI-501-7, 7-Pin Remote Sensor Kit for use with OI-6900.

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Sensor Type: Electrochemical Sensor

Power Type: Dual Battery-Powered

Operating Voltage: 3.6 V (19 Ah each, 38 Ah total) Lithium-Thionyl (Li-SOCl2) Battery, with Connector (Non-Rechargeable)

Battery Life: 2-Year Max. Battery Life

RF Connection: External N-Female Radio Frequency (RF) Connector

Display Screen:

• 102×64 Resolution Graphical LCD Screen

• Transflective (Sunlight Readable) with LED Backlight


• 3 Push-Buttons (MENU, ADD, and SUB)

• 3 Magnetic Non-Intrusive Switches for Calibration (MENU, ADD, and SUB)

Customizable Settings: Adjustable Background Gas Setting (1% to 10% of Full Scale)

Tamb Temperature Range: -40°C to +70°C

WireFree Radio Options: GEN II 900 MHz (200 mW) Radio or GEN II 2.4 GHz (125 mW) Radio


• 52 Networks (GEN II 900 MHz Radio) or 78 Networks (GEN II 2.4 GHz Radio)

• 255 Addresses per Network

Product Dimensions: 15.76 in. L x 5.11 in. W x 5.37 in. H (Max. Dimensions w/ Attachments)

Total Weight: 6 lbs.

Hardware Warranty: Limited one year

Sensor Element Warranty: Varies with Sensor Element and Type

Gas Type: AsH3. CH2O, CH3SH, CH4, CL2, CLO2, CO, CO2, ETO, F2, H2, H2S, H2S2K, HBr, HCL, HCN, HF, LEL, NH3, NH3300, NH3A, NO, NO2, O2, O3, O3H, PH3, SO2, VOC10, VOC20, VOC50, VOC1K, VOC2K

Radio Configuration: Gen II 900 MHz Radio, Gen II 2.4 GHz Radio

Enclosure: Non-Explosion Proof

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