Demystifying Highly-Accurate Thermopile IR Sensors

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Panasonic has revealed new small thermopile IR sensors which can detect moving and motionless people and objects with higher precision and higher accuracy compared to conventional products.

The new Grid-EYE sensors have higher accuracy, increased detection distance (from 5m up to 7m) and lower NETD (Noise Equivalent Temperature Difference) compared to the firm’s existing sensors.

The sensors combine a more sensitive MEMS sensor chip, a digital ASIC (I2C interface) and a silicon lens in an 8×8 grid format. The 64 thermopile elements  can measure temperature of the entire specified area without any contact, contrary to conventional thermal sensors that only measure temperature of a certain point-of-contact.

The 64 pixels yield accurate temperature measurement over a viewing angle of 60° provided by a silicon lens. The I²C interface enables temperature measurements at speeds of 1 or 10 frames/sec.

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Both high gain types (AMG8833 and AMG8834) and low gain types (AMG8853 and AMG8854) are available which feature an improved NETD (Noise Equivalent Temperature Difference) of 0.16°C at 10Hz and of 0.05°C at 1 Hz.

The 60° silicon lens is less than 0.3mm height, the smallest available lens in the market, allowing the sensor size to be reduced to only 11.6 x 8 x 4.3mm, which is around 70% smaller in size than competitor products, according to the firm.

For more information, view the full Press release.

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