Specifications

The Signal Instruments model 418 Infrared Gas Analyzer is designed for the continuous monitoring of CO, CO2, SO2, NO, NH3, NF3, SF6, N2O, CFCs or Hydrocarbons for research, toxic gas measurement and semiconductor gas applications.

The gas analyzer has a totally automatic microprocessor-based operation including auto-calibration and auto-range . This makes the instrument ideal as a "smart" stand-alone unit or as a "building block" for systems integration via a RS-232 communications port or remote contact closures. Automatic diagnostics and fully-configurable alarms are also integral to the gas analyzer.

A large multifunction, backlit LCD provides a clear display of gas concentration measurement, range, sample gas flowrate and the status of critical operating parameters including DC and bias power supplies. The intuitive, menu-driven interface and soft key buttons enable the operator to quickly configure and control the monitor's function. The unit features 19" rack mounting at 4RU height and a weight of only 38 Lb. It has a dual voltage capability of 115 Vac and 230 Vac which is switchable from the rear panel.  

Data sheet

Detector type : NDIR gas filled dual chamber single gas luft detector

Models : NH3, SF6, NF3, CO2, CO, NO, N2O, SO2, CFCs or Hydrocarbon species

Range : Dependant on gas, A, B, C, D or E, Auto-ranging standard

           A : 100, 500, 1000ppm

           B : 1000, 5000, 10000ppm

           C : 1, 5, 10%

           D : 5, 10, 20%

           E : 20, 50, 100%

Response time : Typically < 15s (T5 to T95)

Gas Flow rate : 1.0 to 5.0 LPM

Inlet Pressure : (-5.0) to 15 psig, calibration gas : 5 to 30 psig

Accuracy and repeatability : +/-1.0% of range or 0.2ppm

Temperature effects : Zero : <+/-0.2% per degree C, Span : <+/-0.35 per degree C

Detector Noise : Gas and Range dependant

Linearity : <0.5%

Remote control : Range, calibration and standby mode via contact closure or RS-232

Output : 0-10Vdc and isolated 4~20mA concentration and range identifier voltage

Logic Output : Range , calibration, gas path, mode and readiness

Alarms : Two configurable concentration alarms, logic outputs and on fault contact set

Power : Dual voltage 115/230Vac +/-15%, switch-selectable, 400VA max

Environment : Temperature 5-30 degree C, 95%RH, non-condensing

Dim : 19"rack-mount, 4RU(133.5mm) height, 550mm depth, 18Kg weight

Warranty : 2 Years