OI-7500 Explosion Proof Monitor with 3 Relays


The WireFree Gen II OI-7500-XP is an explosion-proof 32-Channel 3-relay wireless monitor specifically designed for use in conjunction with Otis Instruments, Inc. Gen II WireFree Sensor Assemblies.

Part Number Formula: OI-7500-[Power Supply]-XP-[Radio Frequency]





Supply Voltage: 12-35 VDC or 120/240 VAC

Current Draw 275mA at 24 VDC (monitor only); 6.6 Watts Max

Temperature: -30 to 70° C

Channels: 32 channels


  • Three dry-contact with 4 Amp fuses

  • Three individually configurable set-points

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

Power Connection: Phoenix-like screw terminal

RF Connection: Class I, Div. 1; External N Female connector

Enclosure: Explosion-proof Class I, Div. 1

Warranty: Hardware: One year (Limited)


OI-7500-XP Data Sheet

OI-7500 Operation Manual


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Part NumberDescription
OI-LCD-128LCD Screen with Green LED Backlight
OI-7500-FP-KITOI-7500 Faceplate Kit with Faceplate, Label, (2) Handles, Screen Foam
OI-7500-PCAOI-7500 Control Board Assembly, includes LCD Screen
OI-432-UFL-4u.FL Cable for Connecting Radio Module to Board
OI-WF690-AF-NAntenna Fitting, Class 1, Div 1, N Female
OI-RADIO-2.4-THGEN II 2.4 GHz Radio Module
OI-RADIO-900-LAIRDGEN II 900 MHz Radio Module
OI-AN-2.4-RIGID-S2.4 GHz Antenna, Non-Flexible, Straight
OI-AN-900-FLEX-S900 MHz Antenna, Flexible, Straight
OI-PMC-24V075W1AAReplacement 24VDC/3.125A Power Supply
OI-WF753-PS-BRKTOI-7500 Power Supply Mounting Bracket Kit
OI-420-10Otis Magnet, 10 Lbs
OI-402-5PACKPackage of 5 Desiccant Bags, 6 Grams per Bag
OI-FUSE-4A-250Fuse 4A, 250V Slow Blow

Additional information



Radio Configuration

Gen II 900 MHz Radio, Gen II 2.4 GHz Radio

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