Coming SOON!!!!

Since the release of the original SEC Millenium 22 years ago, our engineers have designed and implemented enhanced optical absorption integrity, lower power consumption and developed software algorithms for our other infrared family of gas detectors and analyzers.  All of this knowledge, experience and features have been incorporated into the SEC Millenium Hawk.


SEC Millenium Infrared Gas Detector
[SEC Millenium]

  • Infrared gas detector for hydrocarbons or CO2
Click image to enlarge

The SEC Millenium Infrared Hydrocarbon Gas Detector is a complete self contained optical hydrocarbon gas detector.  The sensing and reference elements are self-compensating for optical integrity and other signal inhibitors.  The SEC Millenium Hydrocarbon infrared gas detector can operate as a stand-alone 4-20mA gas detector or it can be coupled with an SEC 3100 Universal Transmitter , SEC 3120 Dual Transmitter or SEC 3100 DIN Controller.  Over 50 different hydrocarbon gases can be detected from Methane, Propane, Hexane to Isopropyl Alcohol.  Please check with our factory for your specific gas.  The robust 316 stainless steel construction enables the SEC Millenium infrared gas detectors operate in the harshest environments.  Routine calibrations are not required making this gas detector virtually maintenance free. The SEC Millenium infrared methane gas detector is designed for several different applications including being used as a landfill gas monitor.


  • Reliable infrared sensing technology
  • Explosion proof 316 Stainless Steel construction. Optional nickel plated aluminum available
  • Virtually maintenance free
  • No Mirrors, no moving parts
  • Patented self-compensating optics; U.S. Patent 6,414,310
  • Routine Calibrations not required
  • Low-cost of ownership
  • Fast Response Time
  • Smart Calibration
  • Low Power Consumption
  • Performance Approved

 *Please select the quantity for each item you wish to order and click the 'Add To Cart' button below.

Refineries, Drilling/Production Platforms, Fuel Loading Facilities, Oil Well Logging, LNG/LPG Processing and Storage Facility, Gas Turbines, Chemical Plants, Compressor Stations, Waste Water Treatment Facilities, Transportation Facilities, Airports

SEC Millenium Infrared Hydrocarbon/Carbon Dioxide Gas Detector Specification

Detection Method:  Diffusion – Optional sample draw (requires a minimum of 1 liter per minute flow rate.)

Output (analog):  4-20mA (Source Type), max 1000 Ohm load at 24 VDC supply voltage

Response Time: T50 < 5 seconds
T90 < 10 seconds
Construction: 316 Stainless Steel
Class 1, Division 1, Groups B, C and D

Optional Nickel Plated Aluminum  available
Accuracy: +/- 3% LFL, 0 to 50% LFL (Lower Flammable Limit)
+/- 5% LFL, 51 to 100% LFL
Operating Temperature Rating: -40º to + 70º C at 0 to 99% RH (non-condensing)
Operating Range: 18 to 32 VDC measured at the detector head
Power Consumption: 5 Watts Max
Max Current Draw: (at 24VDC):  Average: 210mA   Peak:  400mA

C22.2 No. 152-M1984 (R1997)
Performance Tested
Class 1, Division 1, Groups B,C, and D

Conforms to UL2075, Methane 0-100% LEL

Installation Category: Cat 1, Pollution Degree 2
Weight: 5 lbs (2.3 Kg.)
Available Gases*:
Acetone Iso-Butane
Acetylene Isopropryl Alcohol (IPA)
Butyl Acetate Jet Fuel
Carbon Dioxide JP4
Cyclopentane JP5
DF 2000 JP8
Diesel Methane
Dimethyl Ether Methanol
Ethane Methyl Amyl Ketone
Ethanol n-Butane
Ethylene Pentane
Gasoline Propane
Green Earth Propane with Methane rejection
Hexane Propylene

Please note that this list is not all-inclusive.  The SEC Millenium can be calibrated for most hydrocarbons or carbon dioxide, provided a calibration gas is available.  Or more information please contact Sensor Electronics Corporation.