General Monitors-Toxic Gas Detection


This Month's Feature

IR700 Gas Detector Protects Against Carbon Dioxide Leaks

 IR700 Gas Detector Protects Against CO2 LeaksOffering reliable gas detection performance with low maintenance, our new, rugged Model IR700 Infrared Carbon Dioxide Point Detector requires no routine calibration and provides complete control room status and control capability for monitoring at the ppm level.

The Model IR700 features a precision IR point sensing element that provides reliable protection against the hazards of carbon dioxide gas leaks. The IR700 offers a true fail-to-safe design for dependable gas detection performance, heated optics to eliminate condensation and a dirty optics indicator informs the user the device must be cleaned before the lenses are entirely blocked, thereby reducing downtime.

Carbon dioxide is an inexpensive and versatile gas that is useful in diverse applications from beverage carbonation to enhanced oil recovery techniques. While nonflammable and fairly innocuous, leaks can be dangerous. Exposure to atmospheric concentrations above 5,000 ppm is considered unhealthy, making careful monitoring crucial at lower levels. Atmospheric concentrations at 1% v/v (10,000 ppm) will make some people feel drowsy while concentrations of 7% v/v and higher can lead to symptoms including dizziness, headache, visual and hearing dysfunction, and unconsciousness.

The IR700 IR detector is a device that continuously monitors CO2 at a range of 0-5000 ppm (consult factory for other available ranges). Its detection principle is based on measuring the absorption of infrared radiation passing through a volume of gas using a dual beam, single detector method. The IR detector measures the intensity of two specific wavelengths, one at an absorption wavelength and another outside of the absorption wavelength. The difference between the two signals is proportional to the gas concentration in the beam path.

All of the Model IR700’s electronics are contained within a rugged, explosion-proof housing so that detector information can be processed at the point of detection. It features multiple communication outputs, a 4-20 mA signal proportional to 0-100% full-scale, Modbus and HART. The IR700 is also available with relays for warning, alarm and faults.

The IR700 can be connected to an IR4000S CO2 transmitter to provide local display and control. The highly versatile IR4000S CO2 incorporates an LED, relay module and magnetic interface in a rugged explosion-proof enclosure. Carbon dioxide concentrations are displayed in increments of 100 ppm. The IR4000S CO2’s rugged design permits installation and calibration in hazardous locations.  Optional 8-A relays expand system functions, reducing the need for integration with other controllers.

The low-maintenance IR700 Carbon Dioxide Detector is factory-calibrated and requires no routine field calibration. Periodic window cleaning and re-zeroing are necessary to ensure performance. The IR700 is able to discriminate between true fault and cleaning requirements and stores fault, maintenance and alarm event history.

The dependable IR700 features accuracy of ±5% of full scale at concentrations less than or equal to 2500 ppm and ±10% of full scale at higher concentrations. It offers a response time of T50 ≤ 4 s, T90 ≤ 8 s. It operates at a temperature range of -40°F to 122°F (-40° to 50°C) and humidity range of 10% to 95% RH, non-condensing.

The IR700 IR Point Detector is available in either an aluminum or a stainless steel housing and is designed for use in Class I, Div. 1 and 2, Groups B, C & D and Zone 1 areas for North America and Zones 1 and 21 internationally. Ingress protection is rated IP66/Type 4X.  The IR700 has CSA, ATEX, and IECEx approvals, the CE Mark and is HART Registered.

Links of interest
Model IR700 Infrared Carbon Dioxide (CO2) Gas Detector
Model IR4000S-CO2 Gas Monitor

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General Monitors, Inc.
26776 Simpatica Circle
Lake Forest, CA 92630

Phone: 949-581-4464
Toll Free: 1-866-686-0741
Fax: 949-581-1151

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