OI-6940 Notis Quad


The OI-6940 Notis Quad is a battery-powered explosion proof 4-gas sensor assembly that simultaneously uses up to four sensors—Electrochemical and/or Low-Power Infrared—for sensing an array of toxic gases in ambient air. The Notis Quad comes standard with a 160×104 graphical LCD screen, four-button interface, non-intrusive switches, and one radio (900 MHz or 2.4 GHz). The Notis Quad is field-adjustable for background gas, and addressable to eliminate interference with other systems. The Notis Quad is designed to be self-contained, to last for up to 6 months using a 3.6V 76 Amp Hour battery-pack, and to reject EMI and other forms of interference in order to avoid false gas readings.

WireFree Explosion-Proof Battery-Powered Ambient Air Multi-Gas Detector (CO, H2S, HCN, O2, SO2, and LEL)

Part Number Formula: OI-6940-[# of Sensors]-[Radio Frequency]-XP

[# of Sensors] = OI 2700-[Gas Type]




Battery Type: 3.6V 76 Amp Hour battery-pack

Battery Life: Up to 6 months (normal operation with standard sensors)

Standard Sensors: H2S, CO, O2, and LEL

Sensor Ranges: H2S = 0-100 PPM, CO = 0-1,000 PPM, O2 = 0-25 %, LEL = 0-100 %

Display: Graphical LCD, sunlight readable (transflective), LED back-light, 160×104 resolution

Interface: Four push buttons (MENU, BACK, ADD, SUB); four corresponding magnetic, non-intrusive switches; non-intrusive calibration

Operating Temperature: -40° F to 129° F; -40° C to 54° C

Enclosure: 10x9x6 Explosion-proof

Certification: Class I, Division 1, Groups C & D


  • Hardware: One year (limited)

  • Sensor: One year (varies with sensor type)

  • Battery: 90 days (from ship date)

Number of Sensors: Up to four

Sensor Type Options: Electrochemical or Low-Power Infrared

Gases: H2S, O2, SO2, CL2, H2, NH3, CO, LEL (hydrocarbons), and more

Remote Sensors: Kit to remote-mount the sensors 10, 25, 50, 75, or 100 feet from the enclosure

Radio Type: 2.4 GHz ISM, 100 mW OR 900 MHz, 200mW


OI-6940 Data Sheet

OI-6940 Operation Manual


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Part NumberDescription
OI-6940-BATTBattery, 3.6VDC/76AH Li-Ion Pack, Non-rechargeable
OI-6940-CB-PCAOI-6940 Control Board with LCD Screen Installed, No Radio Module Installed
OI-6940-BB-PCAOI-6940 Battery Board Assembly
OI-LCD-160LCD Screen with Green LED Backlight
OI-6940-FP-KITOI-6940 Faceplate Kit with Faceplate, Label, (2) Handles, and Foam to Secure LCD Screen
OI-RADIO-2.4-THGEN II 2.4 GHz Radio Module
OI-RADIO-900-LAIRDGEN II 900 MHz Radio Module
OI-432-UFL-4u.FL Cable for Connecting Radio Module to Board
OI-WF690-AF-NAntenna Fitting, Class 1, Div 1, N Female
OI-AN-2.4-RIGID-S2.4 GHz Antenna, Non-Flexible, Straight
OI-AN-900-FLEX-S900 MHz Antenna, Flexible, Straight
OI-420-10Otis Magnet, 10 Lbs
OI-402-5PACKPackage of 5 Desiccant Bags, 6 Grams per Bag
OI-4100-OMain Enclosure O-Ring
OI-2015-SB-NECAnalog Sensor Board for Electrochemical Sensor Elements, Please Specify Gas Type
OI-2016-SB-O2Analog Sensor Board for Oxygen Sensor Elements
OI-2017-SB-LPIRAnalog Sensor Board for Low Power Infrared Sensor Elements
OI-2000-CAP-ASSYSensor Housing Cap with Flame Arrestor and O-Ring
OI-500-BSensor Housing Rainguard
OI-410Calibration Cup Kit, Includes 3 Feet of Tubing
OI-501-77 Wire Remote Sensor Housing Mounting Kit, Does Not Include Cable
OI-SENSOR-CABLERemote Sensor Kit Cable, Sold per Foot
OI-6940-STCart Stand for OI-6940

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