The Duct SafEye Open Path was specially designed and is widely used to monitor and alarm against ingress of hazardous gas concentrations into air intakes of turbine engines and HVAC air ducts. Formation and migration of gas clouds and their possible penetration into safe places, control rooms, turbine engines, etc. is a substantial risk that needs to be addressed.
Users, designers, safety and operational engineers are increasingly required to provide for adequate and fast detection and alarm to protect these hazards.
The specific system’s design for duct applications requires that the small path across an air inlet responds with a very high sensitivity, full scale of 1 LEL.m for 2-6.6 ft. (0.6-2 m) wide inlet and full scale of 2.5 LEL.m for 6.6-23 ft. (2-7 m) wide inlet.
The Duct SafEye, due to its special optics design, provides for a misalignment tolerance of ±2° in all directions and is protected against false gas reading and alarms which are caused by partial obscuration and blocking, misalignment, vibration, flexing or tilts.
Each SafEye unit is factory calibrated in a temperature cycle run at the entire operating temperature range. The temperature compensating mechanism allows correct operation in changing and extreme temperatures while maintaining the system’s accuracy. Its internal microprocessor will automatically compensate for low signals with its internal Automatic Gain Control (AGC).
Specially designed to perform under extreme conditions such as high-speed airflows, high temperatures (up to 158˚F (70˚C)), humidity and corrosive gases, where point detectors may not be effective.
High reliability, simple installation, alignment and maintenance, equipment not subject to poisoning.
Standard 4-20 mA outputs or RS-485 output to allow networking (up to 64 detectors) to a central monitoring/PC system. This feature also enables easy maintenance, local and remote diagnostic tools.
|Detection Range and Response Time||
|Detected Gases||Simultaneous detection of C1 -C8 flammable gases.|
|Immunity to False Alarm||Is not influenced by solar radiation, hydrocarbon flames and other external IR radiation sources, high airflows and high loaded streams.|
|Spectral Response||3.0-4.0 µm|
|Sensitivity Range||0-2.5 LEL.m Standard
0-1 LEL.m by dip-switch setting
|Drift||Long-term ±5% of full scale|
|Temperature Range||-40˚F (-40˚C) to 131˚F (55˚C) for Series 200
-40˚F (-40˚C) to 158˚F (70˚C) for Series 300
|Power Supply||Standard - 24 VDC (18-32 VDC)|
|Power Consumption||Detector: 150mA @ 24 VDC (200 mA Peak)
Source: 100mA @ 24 VDC (220 mA Peak)
|Electrical Connection||2 x 3/4˝ - 14NPT conduits or 2 x M25 x 1.5 mm ISO|
|Electrical Input Protection||Complete electrical interface protection against reversed polarity voltage, surges and spikes according to MIL-STD-1275A|
|Electromagnetic Compatibility||EMI/RFI protected CE Marked|
|Outputs - 4-20mA||The 4-20mA current output is source configuration
Resistance Loop 100-600 Ω
|Outputs - RS-485||Serial communication for full control with maintenance and trouble shooting facility can be integrated for a network of max 64 detectors|
|Outputs - Relays||
ATEX / Cenelec: EX II 2G EExd IIB + H2 T5 (70˚C), T6 (55˚C). EX II 2G EExde IIB + H2 T5 (70˚C), T6 (55˚C).
UL: UL No. - E209870, Class I Groups C and D Hazardous Location
|Water and Dust Tight||IP66 and 67
NEMA 250 6P
|Mechanical Design||The standard detector housing is heavy-duty, copper-free (less than 1%) aluminum. The housing is finished in white epoxy enamel and is also available in 316L Stainless Steel upon request.|
|Environmental Standards||Meets MIL-STD-810C for Humidity, Salt & Fog, Vibration, Mechanical shock, High Temp, Low Temp|
|Dimensions||5.2" (132mm) x 5.2" (132mm) x max. 4.7" (120mm)|
|Weight||Al. Encl. Detector: max 8.1 lb (3.7 kg) Source: max 8.58 lb (3.9 kg)
St. Encl. Detector: max 13.4 lb (6.1 kg) Source: max 13.84 lb (6.3 kg)