Overview

An important decision to make in the selection of a gas sensor for a process environment involves the question of diffusion type versus sample draw system. Diffusion type infrared sensors are highly selective to the target gas, have no moving parts (i.e., pumps or filters to replace), and will operate virtually maintenance free on a continuous basis for several years. Eliminating pumps, tubing, and filters is especially important in refrigerated areas of food processing and cold storage facilities, that are subject to wash downs.

Because we know that effective and reliable gas detection systems can save lives, Manning Systems is committed to high-quality, durable construction including robust, well-designed steel sensors and enclosures. Manning sensors in durable steel enclosures can be mounted easily and have pre-punched holes to accommodate conduit and flex. The enclosures have adequate room for landing wires and high quality connectors that are removable for easy wire insertion. Unlike fragile plastic housings that may break in cold temperatures, Manning Systems enclosures have secured hardware and hinged doors to speed sensor installation in both cold and wet environments.

Unlike a sample draw system where areas are monitored only periodically, all sensors operate continuously in a diffusion design system to ensure total gas detection protection all of the time.

All Manning Systems IR infrared sensors with optional ATMOS equipped^®technology can meet all of their performance specifications down to -50° F and in condensing humidity environments or during wash down.

For the AirScan™ iRF9, every two seconds SensorCheck™

SensorCheck™ technology monitors the AirScan™ source and ensures that the dual channels are functioning properly. A notification signal is transmitted if any of several performance parameters is not met.

All sensors can tie to Manning Systems dedicated central alarm panels with relays to trigger key emergency control functions. Manning's HA20, HA40 and HA71 are "Primary Safety Systems" that allow Emergency Responders to easily assess an emergency situation without human input and provide defined separation of safety and operating systems.

The new AirAlert™ 96dmulti-channel gas monitoring system adds addressable RS-485 Modbus communication protocol to the broad line of Manning Systems readout/alarm units. A total of 96 gas sensors and relay modules can be linked to a single controller.

AirScan™ iRF9 Infrared Refrigerant Gas Sensor

Diffusion design sensor that allows all points of detection to be monitored continuously. The Manning AirScan™ iRF9 sensor responds to refrigerants over the range of 0-3000 ppm and features SensorCheck™ technology that continually monitors sensor performance.

The Manning AirScan™ iRF9 is for refrigerants including R-22, R-134a, R-404a, R-407a, R-410, R-507, NH₃, and CO₂.  
Ranges:

• R Gases: 0-500ppm, 0-1,000ppm, and 0-3,000 ppm
• NH₃: 0-2% PPM, 0-4% ppm
• C0₂: 0-1% PPM, 0-3% ppm