- Model 42i-HL - High Level Nitrogen Oxide Monitor

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The Thermo Scientific™ Model 42i-HL is a chemiluminescent gas analyzer which measures nitrogen oxides (NO-NO2-NOx) in the emissions from a source. The Model 42i-HL is the industry standard for high level NOx Continuous Emissions Monitoring (CEM) systems and stack testing services. Using chemiluminescence technology, the Model 42i-HL measures the amount of nitrogen oxides in the air from 10ppm up to 5000ppm. The 42i-HL is a single chamber, single photomultiplier tube design that cycles between the NO and NOx modes and if required, can be operated continuously in either the NO or NOx modes allowing for response times of less than 5 seconds.

  • Measurement Ranges : 0-10, 20, 50, 100, 200, 500, 1000, 2000, 5000ppm
  • Flowrate : 25 cc/min. and bypass flow rate 250 to 1100 cc/min.
  • Lower Detectable Limit : 50ppb
  • Linearity : ±1% full scale
  • Noise : 25ppb
  • Drift : Zero drift (24 hour): 50ppb
  • Span drift (24 hour): ±1% full scale
  • Response Time : Rise Fall Times (0-90%): 2.5 seconds NO Mode; 5.0 seconds NOx Mode
  • Input/Output : Inputs: 16 digital inputs (standard); eight 0-10VDC analog inputs (optional)
  • Outputs: selectable voltage, RS232/RS485, TCP/IP, 10 status relays, and power fail indication (standard); 0-20 or 4-20mA isolated current output (optional)
  • Power Requirements : 100VAC, 115VAC, 220-240VAC ±10%, 500w
  • Temperature Range : Performance specifications based on operation within 15° to 35°C range. Instrument may be safely operated over the range of 0° to 45°C
  • Dimensions : 16.75W x 8.62H x 23 in.D (42.5 x 21.9 x 58.4cm)
  • Weight : 70 lb. (including external pump) (31.75kg)

Key Features:

  • Chemiluminescence technology
  • Standard single, dual and auto ranges
  • Linearity through all ranges
  • Independent NO-NO2-NOx ranges
  • Replaceable NO2 converter cartridge

iSeries Advantage:

  • Ethernet connectivity for efficient remote access
  • Enhanced user interface with one button programming and large display screen
  • Flash memory for increased data storage and user downloadable software
  • Enhanced electronics design optimizes product commonality
  • Improved layout for easier accessibility to components

Voltage options

  • A = 120VAC 50/60 Hz (standard)
  • B = 220VAC 50/60 Hz
  • J = 100VA 50/60 Hz

Internal zero / span and/or Oxygen Sensor

  • N = No zero / span assembly (standard)
  • Z = Internal zero span assembly
  • S = Oxygen Sensor with No Zero/Span
  • R = Oxygen Sensor with Zero/Span

Converter options
S = Stainless steel (standard)

Sample handling

  • S = Standard plumbing (standard)
  • A = Ammonia Scrubber
  • B = Bypass flow
  • C = Ammonia Scrubber with Bypass Flow

Ozone handling

  • D = Drierite scrubber (standard)
  • P = Permeation dryer

Optional I/O

  • A = None (standard)
  • C = 0-20, 4-20mA current output - 6 channel, 0-10V analog input - 8 channel

Mounting Hardware

  • A = Bench mounting (standard)
  • B = Ears and handles, EIA
  • C = Ears and handles, retrofit

Compliance: ETL, CSA, UL, CE

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