ezPyro™ SMD+ extends the application range of the integrated pyroelectric sensor platform

Pyreos ezPyro SMD infrared detector range is being extended to offer sensing at wavelengths above 5 µm, accessing a wider range of applications such as NDIR detection of:

  • Anesthetic gases
  • Refrigerant gases
  • Exhaust gases

Compared with other pyroelectric and thermopile sensors, this family has high sensitivity, faster response, fast switch-on, lower power consumption, more on-the-fly configurability, lower component counts and easier integration which makes the ezPyro™ SMD a unique solution for gas, flame, motion and gesture detection. The unique thin film pyroelectric sensors inside ezPyro™ sensors offer high SNR and a large dynamic range.

A configurable fully integrated system for infrared detection

Packing a great deal into a tiny package, ezPyro™ combines one or more pyroelectric sensor elements with a digital ASIC. Wavelength-specific sensing is achieved using factory configured optical filters. Configurable signal amplification, filtering and digitisation (ADC), as well as power management are all integrated in this, the smallest sensor of its kind.

The ezPyro™ SMD sensors come in several configurations, including single elements, dual elements and 2×2 arrays. Several application-specific filter options are available including for gases such as carbon monoxide (CO), carbon dioxide (CO2), Methane (CH4) and other hydrocarbons or nitric oxide (NO), or for detection of flames.

Fast design cycle with standard I2C serial interface and development tools

The industry standard I2C bus digital interface allows plug-and-play connectivity to most microcontrollers. Hardware-based communication is less software-intensive and reduces utilisation of microcontroller resources.

The fast development cycle of the ezPyro sensor family is supported by evaluation kits for flame, gas, motion and gesture detection. Other applications can be trialled using the ezPyro SMD prototyping system which supports up to 4 breakout boards. Sensor evaluation without software development is enabled by Pyreos PC software.

ezPyro API is a firmware level driver provides access to all functions of the integrated sensor system. No need to code command and register references to get infrared signals out of your embedded development system!

Low volume custom filters

For special applications you can test your own custom filters on the ezPyro™ ePY12121 (2.2 um long pass filter) or ePY12111 (5.0 um long pass filter).  Call us or contact us for a quote for a low volume custom filter.

Synchronised readout of multiple infrared sensors

Operating up to the FM+ I2C standard with clock speeds up to 1 MHz allows 4 or more sensors configured on the same bus. Each available channel can be individually configured using several variable filters. Another unique feature is that the sampling of multiple ezPyro sensors can easily be synchronized by distributing the clock signal of one ezPyro™ device to one or more others (“daisy-chaining”).

Pyroelectric sensor with unique power management

ezPyro™ is well suited to applications with low power budgets. Current consumption is well below 100 µA when fully activated and less than 1 µA in the lowest power mode. The low power modes come with fast wake up times and the innovative and configurable wake-up by signal feature for motion and gesture.

The infrared emitter is the main power consumer in an NDIR system. Fast response of ezPyro SMD pyroelectric sensors enables energy saving in NDIR gas measurement applications, as the sensor responds optimally to IR source pulses as short as 25 ms. This is >10x shorter than a typical infrared bulb with thermopile gas measurement configuration.

ezPyro SMD detectors enable fast switch-on of a measurement system

Analysis systems comprising an infrared source and a detector, whether for gas or liquid measurement, need to go through a phase of temperature stabilisation. During this time the thermal infrared detector is exposed to a change in its temperature and incident IR light – a challenging situation for a device sensitive to very small changes in thermal energy. The Pyreos surface mountable pyroelectric sensors allow measurements to be taken within seconds, not minutes, on system power up.

Evaluation of custom optical filter configurations

As a lightweight and fast turnaround approach to the evaluation of custom filter sensors Pyreos offers a prototyping service. The engineering samples provided in this mode are based on the standard ezPyro SMD sensor with an application filter mounted on top of the package. See filter options.

3D render of ezPyro SMD+ package
Contact us for custom variants and design support
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View ezPyro SMD Evaluation Kits

Filters available in ezPyro SMD+ prototypes. Other filters available on request.

CWL µm / (HPB nm) Use
2.55 / (90)
2.9 / (300)
3.3 / (160) CH4
3.33 / (160) H-C
3.38 / (190) H-C
3.7 / (110) Reference
3.9 / (200) N2O
3.91 / (90) Reference
4.26 / (180) CO2
4.43 / (60) CO2 (Special)
4.64 / (90) CO
4.64 / (180) CO (Narrow)
4.85 / (90)
4.9 / (130) Reference
5.3 / (180) NO
5.6 / (80) Milk, Reference
5.73 / (80) Milk, Fat
6.2 / (200) NO2
6.46 / (130) Milk, Protein
6.7 / (120) Milk, Reference
7.3 / (200) SO2
8.01 / (440)
8.42 / (180) Refrigerants, Anaesthetics
8.55 / (180) Anaesthetics
8.75 / (220) Anaesthetics
8.95 / (330) Refrigerants
9.5 / (400) Sugar, Ethanol
9.61 / (150) Milk, Lactose, Sugar
9.65 / (220) Anaesthetics
10.27 / (210)
12.23 / (210) Anaesthetics

Key features & benefits

  • Integrated SMD infrared sensor system
    • Now also for wavelengths above 5 µm
    • World first SMD pyroelectric sensor
    • Smallest digital pyroelectric sensor
    • Lower system cost due to integrated functions
    • Plug-and-play connectivity using the I2C bus interface & daisy chaining sensors
    • Ultra-low power, sleep modes & wake-up by signal
    • Fully configurable independent channel
  • Fastest thermal sensor available
    • Reducing emitter on time and thus system power consumption
    • Fast switch-on
  • Excellent sensing performance
    • High quality thin film sensor elements offering short response times and high sensitivity to enable further system power savings through lower IR source duty cycles
    • EMI immunity
  • Fast time to market
    • Extensive development support ecosystem
    • Open API
    • Wide development tools array

Ideal as the infrared detector for


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ezPyro™ SMD+ IR Sensor for Gas Sensing Short Form Datasheet Download
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