ezPyro™ SMD Dual – two channel pyroelectric detector
Part of the ezPyro SMD family, the dual-channel ezPyro sensor colocates two of our thin-film PZT pyroelectric elements – separated by just 1.6 mm Inter-Pixel Distance (IPD). The small IPD means that two channels can be measured by illuminating an area just 2.8 mm across, making for an optically simple and energy-efficient design. It also ensures that both elements are in near-identical environments, giving the best possible reference compensation. The integrated digital package reduces detector cost and component count/cost whilst increasing the performance of customers’ modules.
Applications in gas detection include carbon dioxide (CO2), methane (CH4) and hydrocarbons, refrigerants, nitrogen oxides (NOx) and sulphur oxides (SOx). The product can also be used in flame detection applications.
ezPyro SMD infrared detector range
The dual-channel sensor extends the digital ezPyro range, which is already the world’s smallest and fastest pyroelectric sensor. ezPyro SMD combines high sensitivity with benefits such as low power consumption, built-in power management, simple integration, a digital interface and the cost-effectiveness of SMD.
Compared with other pyroelectric and thermopile sensors, the ezPyro SMD 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 are available 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 sensor breakout boards. Sensor evaluation without any software development effort is enabled by Pyreos PC software.
ezPyro API is a firmware-level driver providing 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!
Evaluation kits – dual IR
The ezPyro SMD Dual is compatible with the complete ezPyro evaluation and development ecosystem, sharing the integrated read-out circuitry and an I2C digital communications bus, APIs and sampling synchronisation with emitters and other detectors. This virtually eliminates development barriers for customers familiar with ezPyro SMD or ezPyro TO products when evaluating and designing this solution. See https://pyreos.com/evaluation-kits for more information.
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 & gesture.
The infrared emitter is the main power consumption sink in an NDIR system. Fast-response ezPyro SMD pyroelectric sensors enable energy saving in NDIR gas measurement applications because 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.
Optical filter configurations
Pyreos can offer ezPyro SMD Dual prototypes with various optical filters. Please inquire regarding your IR sensing project needs.