MICS-VZ-89TE

Data Sheet MiCS-VZ-89TE The MiCS-VZ-89TE is an integrated sensor board for Indoor Air Quality monitoring. The MiCS-VZ-89TE combines state-of-the-art MOS sensor technology with intelligent detection algorithms to monitor tVOCs and CO2 equivalent variations in confined spaces, e.g. meeting rooms or vehicle cabins. The dual signal output can be used to control ventilation on-demand, saving energy and reducing cost-ofownership. Features • • • • • Calibration-free Low power Wide VOCs detection range High sensitivity High resistance to shocks and vibrations Conversion from PWM output signal of MICS-VZ-89TE to equivalent Carbon Dioxide concentration in ppm Detectable gases • Volatile Organic Compounds • Equivalent Carbon Dioxide VOCs CO2(equiv) Conversion from PWM output signal of MICS-VZ-89TE to equivalent tVOC concentration in ppb For more information please contact: Info.em@sgxsensortech.com SGX Sensortech, Courtils 1 CH-2035 Corcelles-Cormondrèche Switzerland www.sgxsensortech.com Comparison between MICS-VZ-89TE output signal and NDIR CO2 sensor signal over a duration of 4 consecutive days (Thu – Sun) Page 1 of 5 MiCS-VZ-89TE Data Sheet Performance Detection Method Semiconductor gas sensor, detecting a wide range of VOCs Monitoring Range 400-2000 ppm equivalent CO2 0-1000 ppb isobutylene equivalent tVOCs PWM Output I2C Output Response Time Refresh Output Frequency Pin 1 : TTL output 30Hz +/-1%, Range 5…95%, duty cycle 3.3V Use a pull-up resistance between Pin 1 and Pin 6 Pull-up value: typ. 10kOhms for 3.3V operation Pin 2 and 4 : Pull-up of 4.7 kOhms on master SDA and SCL Equivalent to conventional NDIR-CO2 sensors < 5 seconds for tVOC 1 Hz Operation Supply Voltage Operating Power Warm-up Time Operating Temperature 3.3V DC regulated +/- 5% 125 mW 15 min 0°C to 50°C Operating Humidity 0%RH to 95%RH (non condensing) Storage Temperature -40°C to 80°C Storage Humidity 0%RH to 95%RH (non condensing) IMPORTANT PRECAUTIONS Read the following instructions carefully before using the indoor air quality sensor described in this document to avoid erroneous readings and to prevent the device from permanent damage. •The sensor must not be exposed to high concentrations of organic solvents, ammonia, silicone vapour or cigarette-smoke in order to avoid poisoning the sensitive layer. •The sensor should be protected against water and dust projections. •SGX strongly recommends using ESD protection equipment to handle the sensor. •For any additional questions, contact SGX Sensortech Page 2 of 5 MiCS-VZ-89TE Data Sheet MiCS-VZ-89TE - Power-on Self-Test Parameter Criteria Failed Diagnostic Indicator Sensor Resistance Range Range Check PWM < 5 % at Power ON Sensor Operating Power Range Check PWM < 5 % at Power ON MiCS-VZ-89TE – PWM Output After Power-on self-test (2 seconds) , the device will provide either a single “Failed Diagnostic Level” in case of sensor failure of the sensor or PWM multiplexed output indicating “CO_ equivalent_ Level” and “VOC _isobutylene_equivalent Level” referred to the isobutylene sensitivity unit. . A simple manner to test the reactivity and sensitivity of gas sensor is to expose to alcohol bottleneck for example . CO2 equ [ppm] PWM Output [%] VOC (isobutylene) [ppb] PWM Output [%] 400 55 0 5 1027 70.7 200 13 1654 86.4 500 25 2000 95 1000 45 PWM 80% PWM 30% 33.3 ms 1/T = 30 Hz tVOC from 5% to 45% CO2 equ from 55% to 95% Page 3 of 5 Data Sheet MiCS-VZ-89TE MiCS-VZ-89TE Output Out of this initial period, the device will have the I2C data CO2 equivalent [ppm] and tVOC equivalent referred to the isobutylene sensitivity unit [ppb]. D1: Data_byte_1: tVOC: [13…242] -> tVOC [ppb] = (D1-13) * (1000/229) D2: Data_byte_2: CO2_equ: [13…242] -> CO2_equ [ppm] = (D2 -13) * (1600/229) + 400 D3: Data_byte_3: RS first byte(MSB) -> Resistor value [W] = 10*(D5+ (256*D4) + (65536*D3)) D4: Data_byte_4: RS second byte D5: Data_byte_5: RS third byte(LSB) MiCS-VZ-86 Output D6: Status D7: CRC Page 3 of 5 Data Sheet MiCS-VZ-89TE Package outline dimensions The MiCS-VZ-89TE is available as PCB and can be mounted with a M2.5 screw in appliances. Connections are made with soldering on card edge (cut via connector) Pin Connection VZ-89TE 6:+ 3.3V 5: NC 4: SDA 1: PWM OUT 2: SCL 3: GND Product nomenclature For more information please contact: info.em@sgxsensortech.com SGX Sensortech, Courtils 1 CH-2035 Corcelles-Cormondrèche Switzerland www.sgxsensortech.com Whilst SGX sensortech has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also reserves the right to change the specification of goods without notice. SGX sensortech accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of third party patents arising from the use of sensor or other devices in accordance with information contained herein. Page 5 of 5