PYROMID® Multi Channel Detectors

PYROMID® Multi Channel Detectors

Dual channel, quad channel and eight channel detectors for gas analysis

  • Integrated beam splitter in the detector or micromechanical frame for compact design
  • One common aperture opening for all channels
  • Inside filter, common entry window
  • Low channel crosstalk (< 0.1 %)
  • Signal processing with JFET or operational amplifier

PYROMID® Multi Channel Detectors

Parameters
Type LIE, LIM: Detectors with standard design
LME, LMM: Detectors with reduced microphonic effect
LRE, LRM: Detectors with micromechanical frame
LFP: Detectors with tunable Fabry‐Pérot filter
Housing TO18, TO46: 5.4 mm in diameter
TO5, TO39: 9.2 mm in diameter
TO8: 15.2 mm in diameter
The number following the hyphen indicates the number of pins.
Channel Number of measuring channels
Aperture (mm) Size of the circular or rectangular aperture through which radiation hits the sensitive elements.
Operating modes Size of the circular or rectangular aperture through which radiation hits the sensitive elements.
JFET/OpAmp Integrated signal condition like integrated junction field effect transistors (JFET) for detectors in voltage mode or integrated operational amplifiers (OpAmp) for detectors in current mode.
Thermal Compensation A pyroelectric detector is sensitive to changes in temperature. Changes in ambient temperature have an influence on the measurement signal and shifts the operating point. This effect reduces a thermal compensation. Therefore, each pyroelectric element gets an additional optically inactive element, which compensates for unwanted currents.
Low Micro Patented micromechanical chip attachment (LowMicro) by InfraTec to reduce the effects of interfering impact sounds.
Specific Detectivity* As a key parameter, the specific detectivity D* characterizes the signal-to-noise ratio of infrared detectors.
InfraTec Detector Filter PYROMID® Multi Channel Detectors
Type
Housing
Channel
Aperture (mm)
Operating modes
JFET/OpAmp
Thermal Compensation
Low Micro
Specific Detectivity*
Download further information
LRM-102TO4623.0 x 2.0Voltage ModeJFETNoNo4.0LRM-102
LRM-202TO4623.0 x 2.0Voltage ModeJFETYesNo2.0LRM-202
LRM-292TO4623.0 x 2.0Current ModeOpAmpYesNo3.0LRM-292
LIM-011TO842.8 x 2.8Voltage ModeJFETNoNo0.8LIM-011

Integrated Beamsplitter

LIM-054TO842.8 x 2.8Current ModeOpAmpNoNo0.42LIM-054

Integrated Beamsplitter

LRM-244TO848.5 x 8.5Current ModeOpAmpYesNo6.0LRM-244
LRM-274TO848.5 × 8.5Current ModeOpAmpYesNo4.0LRM-274

single supply operation

LRM-278TO888.5 x 8.5Current ModeOpAmpYesNo4.5LRM-278

Single supply operation 

LIM-032TO3922.8 x 2.8Voltage ModeJFETNoNo2.9LIM-032

Integrated Beamsplitter

LRM-254TO3945.0 x 5.0Voltage ModeJFETYesNo4.7LRM-254
LRM-284TO3945.0 x 5.0Current ModeOpAmpYesNo4.5LRM-284

Single supply operation

* in 108 cm√Hz/W (500 K, 10 Hz, 1 Hz BW, 25°C, without window)

** in 108 cm√Hz/W (500 K, 1 kHz, 1 Hz BW, 25°C, without window)

*** at Rfb = 128 GΩ, Cfb=200fF

LRM Detectors – Miniaturization in Series

  • PYROMID® multi channel detector LRM-254 from InfraTec
    Further information about LRM-254

    LRM-254

    As the first representative of the LRM series, the LRM-254 marks the starting point for all other models. The miniaturized four channel detector in a TO39 housing with an square aperture opening of 5 mm has the typical features of this product series: cap with central window, channel filters inside the detector, miniaturized stack design, large FOV.

  • PYROMID® multi channel detector LRM-292 from InfraTec
    Further information about LRM-292

    LRM-292

    The LRM-292 pyroelectric detector from InfraTec is, next to the LRM-102 and the LRM-202, the world‘s smallest multi-channel detector with integrated operational amplifier and thermal compensation. With a diameter of only 4.7 mm, he is predestined for measuring low gas concentrations at small measurement volumes. Fast gas changes, low gas concentrations, and short gas exchange times are not a challenge for the LRM-292 in a compact TO46 housing.

  • PYROMID® multi channel detector LRM-202 from InfraTec
    Further information about LRM-102 and LRM-202

    LRM-102 and LRM-202

    In the range of the miniaturised LRM series, the LRM-102 and the LRM-202 are two detectors with compact design. Both dual channel detectors are integrated in TO46 housings. Their aperture opening has a size of approximately 6 mm2 each. As a solution e.g. for gas analysis and leakage detection, they can be used in stationary and mobile devices ranging from medicine to safety technology.

  • PYROMID® multi channel detector LRM-244 from InfraTec
    Further information about LRM-244

    LRM-244

    An enormous field of view (FOV) distinguishes the LRM 244 from other detectors of the LRM series. The extremely large, symmetrical field of view of the detector of more than 90 degrees enables flames to be detected within the greatest possible angular range. In addition to this, pyroelements, each with a particularly large sensitive surface of 2 × 2 mm2, ensure an ideal signal-to-noise ratio.

  • PYROMID® multi channel detector LRM-284 from InfraTec
    Further information about LRM-284

    LRM-284

    On the market there are only a few miniaturized multi-channel detectors operating in current mode. Therefore the LRM-284 is definitely something special. The current mode of the single supply detector is enabled by two double-operational amplifiers. This detector allows the design of an analyser with low power consumption – a fact which particularly speaks for the operation of the detector in portable devices.

  • PYROMID® multi channel detector LRM-278 from InfraTec
    Further information about LRM-278

    LRM-278

    The LRM-278 is the world's first detector of its kind to combine eight measurement channels in a TO8 housing with a diameter of 15.2 millimetres and operates in current mode. It also incorporates a temperature sensor. Measuring the temperature inside the detector, for example, provides the option of compensating the typical temperature drift of the filters very accurately by means of a calibration.

  • PYROMID® multi channel detector LRM-274 from InfraTec
    Further information about LRM-274

    LRM-274

    As a specialist in flame detection technology the LRM-274 expands the range of detectors, that are characterized by a field of view wider than 90˚. The low-power detector requires only one unipolar supply voltage and is particularly suitable for operation in industrial fire protection and early fire detection devices. Due to its integrated heating resistors users themselves can test the detector if necessary.

Planar multi channel pyroelectric detectors from InfraTec

Planar Multi Channel Detectors

Detectors for gas analysis and flame detection

  • Two, three or four spectral channels in one housing
  • Thermally compensated (optional)
  • With special chip holder for reducing the microphonic sensitivity (optional)
  • Low channel crosstalk (< 0.1 %)
  • Signal processing with JFET or operational amplifier

Planar Multi Channel Detectors

Parameters
Type LIE, LIM: Detectors with standard design
LME, LMM: Detectors with reduced microphonic effect
LRE, LRM: Detectors with micromechanical frame
LFP: Detectors with tunable Fabry‐Pérot filter
Housing TO18, TO46: 5.4 mm in diameter
TO5, TO39: 9.2 mm in diameter
TO8: 15.2 mm in diameter
The number following the hyphen indicates the number of pins.
Channel Number of measuring channels
Aperture (mm) Size of the circular or rectangular aperture through which radiation hits the sensitive elements.
Operating modes Size of the circular or rectangular aperture through which radiation hits the sensitive elements.
JFET/OpAmp Integrated signal condition like integrated junction field effect transistors (JFET) for detectors in voltage mode or integrated operational amplifiers (OpAmp) for detectors in current mode.
Thermal Compensation A pyroelectric detector is sensitive to changes in temperature. Changes in ambient temperature have an influence on the measurement signal and shifts the operating point. This effect reduces a thermal compensation. Therefore, each pyroelectric element gets an additional optically inactive element, which compensates for unwanted currents.
Low Micro Patented micromechanical chip attachment (LowMicro) by InfraTec to reduce the effects of interfering impact sounds.
Specific Detectivity* As a key parameter, the specific detectivity D* characterizes the signal-to-noise ratio of infrared detectors.
InfraTec Detector Filter Planar Multi Channel Detectors
Type
Housing
Channel
Aperture (mm)
Operating modes
JFET/OpAmp
Thermal Compensation
Low Micro
Specific Detectivity*
Download further information
LMM-244TO84ø 9.5Current ModeOpAmpYesYes5.0LMM-244
LMM-274TO84ø 9.5Current ModeOpAmpYesYes5.0LMM-274

Single supply operation

LIM-222TO392ø 6.0Voltage ModeJFETYesNo4.5LIM-222
LIM-262TO392ø 6.0Current ModeOpAmpYesNo4.5LIM-262
LIM-272TO392ø 6.0Current ModeOpAmpYesNo3.0LIM-272

Single supply operation

* in 108 cm√Hz/W (500 K, 10 Hz, 1 Hz BW, 25°C, without window)

** in 108 cm√Hz/W (500 K, 1 kHz, 1 Hz BW, 25°C, without window)

*** at Rfb = 128 GΩ, Cfb=200fF

PYROMID® Brochure

Get further information about miniaturised detectors for gas analysis and flame detection.

PYROMID® Multi Channel Detectors

Detector Search

InfraTec offers five different product groups including approximately 50 standard pyroelectric detectors. Choose your suitable infrared detectors with the help of our detailed detector search.

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