Inside the 3 x 3 x 0.9mm LGA package are four separate metal oxide gas sensors, each with its own hot-plate, plus a processor whose algorithms decode the four sensor outputs into: ‘equivalent CO2‘ (400 – 65,000ppm), total volatile organic compounds (0 – 65ppm), AQI-U air quality index (scored 1 to 5, based on UBA (German environmental agency) index) and AQI-S air quality index (scored 0 to 500).
Raw sensor data is also available for external processing.
“Independent hotplate control allows the detection of a range of volatile organic
compounds including ethanol, toluene, hydrogen and oxidizing gases,” according to the company, which added: “It is highly immune to degradation caused by humidity or ozone.”
SPI and I2C interfaces are included for communication with a host processor.
Operation is over -40 to +85°C and 5 to 95% relative humidity.
Power is required at between 1.71 and 1.98V for the internal circuitry, and 1.71 to 3.6V to power the IO interface.
Battery operation is possible because the heaters can be time cycled – averaging 700µA in its once-per minute lowest power mode.
With precautions, the package is reflow solderable.
For development, there is an evaluation kit
Applications in domestic air sensors, ventilation systems, thermostats cooker hoods and air purifiers are expected.
See ENS161 at the ScioSense stand (433 in hall 1) at Sensor+Test, which runs alongside the PCIM power exhibition in Nuremburg this week (9-11May).
The device
includes a high-performance ASIC that converts raw gas measurements to computed index
scores and a variety of widely used air quality signals. This helps save power in the
application, as the host processor is not required to execute complex conversion algorithms.
Samples of the ENS161 are available now and the product is due to go into mass production
in the third quarter of 2023.
More information may be found at www.sciosense.com.
Hi Steve,
I hope you had a lovely long weekend.
I am sure you know it is the first day of PCIM/Sensors & Test today!
I was supposed to be there but unfortunately I got sick over the weekend so I have been unable to travel ????
ScioSense are at the show launching their new low-power gas sensor enabling use in smaller products.
I have attached the full announcement and also copied below;
New opportunities for air-quality monitoring in
wearable and portable devices as ScioSense launches
low-power gas sensor
* ENS161 multi-gas sensor draws average current of 700µA
to enable continuous high-performance operation in devices with a small battery
* Sensor offers designers wide range of air-quality monitoring outputs,
including eCO2 and eTVOC measurements and multiple AQI scores
* Easy to integrate, the ENS161 performs on-chip heater drive control
and provides fully computed measurements over I2C or SPI
Product properties
Environment-40 to +85°C / 5 to 95% rH
VDD1.71 to 1.98V
Dimensions3.0 x 3.0 x 0.9 mm
Sensor+Test is an exhibition that runs alongside PCIM in Nurnberg Germany this week (9-11May).
