CO2F-W High Speed Carbon Dioxide Sensor CO2F-W is a high speed (20 Hz) CO2 sensor, ideally suited for applications which require capture of rapidly changing CO₂ concentrations including metabolic assessment and analytical instrumentation. Unlike electrochemical sensors the CO₂ sensors connect to customers systems using the TTL-Level RS232 protocol. This removes the need for A to D conversion.       High speed sensing (20Hz) Measurement ranges from 0 to 100% 3.3V supply Low power requirement 35mW All sensors come pre-calibrated and temperature compensated Flow through adapter is optional. You can order the sensor with or without the adapter. Please see ordering guide at the end of this datasheet to see how to order adapter. CO2F-W Sensor *Flow through adapter in picture must be specified in part number if required. Specifications CO2 Measurement Sensing Method Sample Method Measurement Range Accuracy Measurement Noise Non Linearity Pressure Dependence Operating Pressure Range © 2013 SST Sensing Ltd DS0002 rev3 Non-dispersive infrared (NDIR) absorption Patented Gold-plated optics Patented Solid-state source and detector Diffusion(Standard) / Flow through (with flow-through adapter) 0-5%, 0-20%, 0-60%, 0-100% ±70 ppm +/- 5% of reading1 <10% of reading with no digital filtering < 1% of FS 0.1% of reading per mbar in normal atmospheric conditions 950 mbar to 10 bar2 1 www.sstsensing.com Please follow all safety information General Performance Warm-up Time Operating Conditions < 1 minute 0°C to 50°C (Standard) -25°C to 55°C (Extended range) 0 to 95% RH, non-condensing Recommended Storage -30°C to +70°C Electrical/ Mechanical Power Input • 3.2 to 5V. (3.3V recommended) • Peak current 100mA • Average Current <15mA Power Consumption 35 mW Output UART only Dimensions and Wiring Connections 2x5 0.1” header. Pin 1 is identified on the dimensional drawing. Function 0V +3.3V Sensor Rx (in) Sensor Tx (out) N/C Pin # 1 3 5 Pin # 2 4 6 Function N/C 0V/GND 0V/GND 7 8 Zero N 9 10 Zero Air Pin 2 should not be connected. Pins 4 and 6 do not require connection and are internally connected to GND. The zeroing options are for hardware zeroing (both active low). These functions can also be implemented by sending a serial command (recommended). Typical connections for digital interface are GND, 3.3V, Rx and Tx. Note that the Vh for the serial Tx © 2013 SST Sensing Ltd DS0002 rev3 2 www.sstsensing.com Please follow all safety information Note 1: All measurements are at STP unless otherwise stated. Note 2: External Pressure calibration required. Note 3: User Configurable Filter Response. Part Numbering Guide Replace A, B and C with the following values to create the part number you require. CO2F-W A B-C Flow Through Ranges With = F Without = Leave Blank 5% = 5 20% = 20 Reverse Pins 60% = 60 100% =100 With = R Without = Leave Blank Examples CO2F-WF-5 = Flow Through Adapter, without reverse pins, 5% range CO2F-WR-20 = No Flow Through Adapter, reverse pins, 20% range General Note: SST Sensing Ltd reserves the right to make changes in product specifications without notice or liability. All information is subject to SST’s own data and considered accurate at time of going to print. WARNING CAUTION All SST Sensing Ltd products are tested under nominal operating conditions during the production process. Applications for our products are varied and,as these are outside our control, specification information provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their intended application. Do not exceed maximum ratings. Carefully follow all wiring instructions, incorrect wiring can cause permanent damage to the device. Do not use chemical cleaning agents. © 2013 SST Sensing Ltd DS0002 rev3 Failure to comply with these instructions may result in product damage. 3 www.sstsensing.com Please follow all safety information