Otis Instruments OI-7420-X-2 Wired Monitor

Availability: In stock
Product Type2 Channel Wired Gas Monitor
Power TypeWired Powered
Operating Voltage12V to 35V DC or 120V AC
Current Draw225 mA Maximum
Power Supply3.125A (150W), 85/264V AC to 24V DC (Optional)
Output (Digital)RS-485 Modbus
  • Power EMI Filter,
  • 4-20 mA Surge Suppression,
  • RS-485 and RS-232 Surge Suppression
Display Screen
  • 160x104 Resolution Graphical LCD Screen
  • Transflective (Sunlight Readable) with LED Backlight
Interface4 Push-Buttons (MENU, ADD, SUB, and RESET/ESC)
Temperature Range-40°C to +70°C
Wired (Analog) InputUp to 2 Wired 4-20mA (Analog) Inputs
Product Compatibility
  • Any Otis Wired Sensor (01-617, 01-675, 01-6000, 01-6000K),
  • 3rd Party Wired (Analog) Sensors
  • 4 Dry-Contact Relays with 4 Amp Replaceable Fuses,
  • Fault Terminal, Option to Disable Alarm Relays,
  • Latching and Non-Latching Relay Settings,
  • Individual Set Per Channel
Enclosure MaterialNEMA 4X Fiberglass Enclosure with Clear Window
Product Dimensions8 in. L x 8 in. W x 4 in. H (Max. Dimensions with Attachments)
Total Weight8.15 lbs.
Product Mounting
  • 4 Mounting Feet, 6 in. W x 12-1/4 in. T (included),
  • Maximum Mounting Bolt/Screw Size of 5/16 in. (8mm) Diameter
Hardware Warranty1-Year, Limited
Part Number Formula
  • OI-7420-[Power]-2
  • 0I-7420-X-2

The Otis Instruments OI-7420 ProSafe 4x2 Controller is a wired monitor that supports up to 2 individual 4-20 mA wired sensor assemblies. Four relays can be individually set up to the full scale of the channel and may be set to either latching or non-latching. Compatible with any wired device with a 4-20 mA output, allowing more than just gas detection to be displayed and monitored for a safer working environment.


  • 2 Channel Wired Monitor - Supports Any 4-20 mA Wired Sensor
  • 12 to 35 VDC Operating Voltage with an Optional AC Supply
  • Operating Temperature Range of -40°C to +70°C
  • Graphical LCD with LED Backlight
  • 4 Push-Button Interface (ADD, MENU, SUB and RESET/ESC)
  • 4 Individually Configurable Alarm Set-Points: Four Front Panel ALARM LED Indicators (Red); 4Dry-Contact Relays (4 Amp Maximum per Relay)
  • Status LEDs for Power and Fault: Multi-Color Status Light; Amber Fault LED for Indicating System Faults
  • Output Options: Wet Contact DC Fault Terminal, Relay 4 CanOptionally Be Configured as a Fault Relay, RS-485 Modbus
  • NEMA 4X Standard Fiberglass Enclosure with Clear Lid
  • 1-Year Limited Hardware Warranty

Please refer to datasheet for more information
Technical Data-Sheet