OI-6900 Group B Explosion Proof Dual Battery Powered WireFree Sensor Assembly

OI-6900 Group B Explosion Proof Dual Battery Powered WireFree Sensor Assembly

The Otis Instruments WireFree OI-6900 Series Ambient Air Hazardous Gas Detector is a wireless, dual battery-powered assembly that uses an electrochemical or low-power infrared sensor element to detect a variety of toxic or combustible gases. The OI-6900 offers nonintrusive calibration, allowing the device to remain Class I, Division 1, Groups B, C and D certified, while adjustments are made 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]-K-2B

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

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Sensor Type: Electrochemical, Photo Ionization Detector or Low-Power Infrared 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:

• 1-Year Max. Battery Life (Low-Power Infrared)

• 14 Day Max. Battery Life (Photo Ionization Detector)

• 2-Year Max. Battery Life (Electrochemical)

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: -20 to +60°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: 5.30 in. L x 8.26 in. W x 17.76 in. H (Max. Dimensions w/ Attachments)

Total Weight: 6 lbs.

Remote Sensor Kit (Additional feature): OI-501 Remote Sensor Kit with Enclosure (7 pin)

• Electrochemical Sensor Max Length: 250 Feet

• Low Power Infrared Sensor Max Length: 40 Feet

• Photo Ionization Detector Max Length: 35 Feet


• UL/CSA/FM Certified Explosion/Flame-Proof Main Enclosure

• QPS Certified Explosion/Flame-Proof Sensor Housing

Hazardous Location Certifications and Approvals:

• Main Enclosure

        • Class I, Div. 1 & 2, Groups B, C, D

        • Class I, Zones 1 & 2, Groups IIB + H2, IIA

        • Class II, Div. 1 & 2, Groups E, F, G

        • Class III, Type 3, 4, 4X

        • NEMA 3, 4, 4X, 7 (B, C, D) 9 (E, F, G)

        • Ta= -20°C to +60°C

• Sensor Housing

        • Class I, Division 1, Groups B, C and D

        • TAmb= -40 °C to +60 °C

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: Explosion Proof

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