SenseAir S8 - Sensors Tecnics, Honeywell
SenseAir S8 - Sensors Tecnics, Honeywell
SenseAir S8 - Sensors Tecnics, Honeywell
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Key technical specificationItem<strong>SenseAir</strong> ® <strong>S8</strong>Target gas CO 2Operating PrincipleNon-dispersive infrared (NDIR)0.04 to 2% volume CO 2 (Note 1)Measurement rangeUp to 3.2% volume CO 2 extended range (Note 2)Accuracy +-0.02% volume CO 2 +-3% of reading (Notes 3 and 4)Response timeOperating temperature2 minutes by 90% for diffusion sampling method model0 to 50C (Sensor works from -20C but values valid only for 0-50C)Operating humidity 0 to 85% RH non condensed (Note 5)Storage temperatureDimensions (mm)WeightPower supplyPower consumptionSensor lifeSerial communication-40º to + 70º CArticle no: 004-0-0050 32.7 x 19.7 x 9.9Article no: 004-0-0051 33.3 x 19.7 x 9.9< 8 grams5V ±5% unprotected against surges and reverse connection300 mA peak, 30 mA average, configurable15 years in normal commercial environmentsUART, Modbus protocolPWM output, 1 kHzAlarm_OCDirection control pin for direct connection to RS485 transceiver integrated circuit.0 to 100% for 0-20 000 ppm; 3.3V push-pull CMOS output, unprotectedAlarm state openCO 28500/6500 ppm, Normally conducting max 100mA. Transistor open at CO 2 High, ORPower Low, OR at Sensor FailureTable 1. Key technical specification for the <strong>SenseAir</strong> ® <strong>S8</strong>__________________________________________________________________________________________Note 1: Sensor is designed to measure in the range 0 to 32000 ppm with specified in the table accuracy. Nevertheless exposure toconcentrations below 400 ppm may result in incorrect operation of ABC algorithm and shall be avoided for model with ABCon.Note 2: Sensor provides readings via UART in the extended range but the accuracy is degraded compared to specified in the tableone.Note 3: In normal IAQ applications. Accuracy is defined after minimum 3 weeks of continuous operation. However, some industrialapplications do require maintenance. Please, contact <strong>SenseAir</strong> for further information!Note 4: Accuracy is specified over operating temperature range. Specification is referenced to certified calibration mixtures.Uncertainty of calibration gas mixtures (+-2% currently) is to be added to the specified accuracy for absolute measurements.Note 5: Specification provides operating conditions 100% tested in production. Normally sensors shall operate at 0..95%RH and0..50C temperature range
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