SLS-1500 Liquid Flow Meter Compact Flow Meter for Industrial Applications ■ Liquid flow rates up to 40 ml/min ■ 20 ms response time ■ High chemical compatibility ■ Modular electrical interface Interface Options Product Summary Digital - I2C-Bus - RS485-Bus - USB Cable The SLS-1500 liquid flow meter enables precise, non-invasive measurements of dynamic liquid flow rates up to 40 ml/min bi-directionally. Excellent biocompatibility is ensured by the exclusive use of high-performance stainless steel, PTFE and PEEK for the wetted parts. The flow path of the SLS-1500 liquid flow sensor is formed by an especially thin-walled, straight tube which assures excellent sensitivity. Analog - Voltage output (0-10 V) - Additional operation modes For more information on communication, please refer to page 2 of this document. Table 1: Performance of SLS-1500 (all data for medium H2O, 23°C, 1 barabS unless otherwise noted) aFlow rate at which the sensor output saturates, see section 2 for performance specification between full scale and saturation point. bAccuracy respectively repeatability below ±20 ml/min. See the charts in section 2 for the accuracy respectively repeatability specifications between ±20 ml/min and full scale. 'Maximum additional offset when flow channel is vertical. dNon-condensing, flow path empty.

2 Specifications Charts 3 Communication with the Liquid Flow Meter Parameter The SLS-1500 flow meter shows bidirectional, linear transfer characteristics. The product comes fully calibrated for water. Digital sampling time at 16 bit resolution: 74 ms Digital sampling time at 9 bit resolution: 1 ms 3.1 Electrical Specifications This section describes electrical specifications when connecting directly to the sensor's M8 connector for I2C communication. The preferred mode of communication is via the SCC1 interface cables. See the respective SCC1 datasheets for further details. 3.2 Electrical...

3.6 Digital Communication via I2C-Bus The SLS-1500 liquid flow meter has been designed for use with the SCC1 interface cables. For special applications, direct communication with the flow meter via the standard I2C-interface is possible. The physical interface consists of two bus lines, a data line (SDA) and a clock line (SCL) which need to be connected via pull-up resistors to the bus voltage of 4 Fluidic Connection the system. By default, the I2C address is set to 64 (hexadecimal: 40, binary: 1000000). These lines can be used on 3.3 V or 5.0 V levels with a recommended clock frequency of 100...

6 Ordering Information Standard shipment includes only the sensor, neither cables nor fluidic connection material. For optimum performance, Sensirion recommends using the SLS-1500 flow meter in combination with the SCC1 interface cables. For laboratory use and technology evaluation, the Flow Meter Kit SLS-1500 can be ordered. This laboratory-package contains: ■ Liquid Flow Meter SLS-1500 ■ PC Software (Viewer & Data Export Tool); ■ SCC1-USB Sensor Cable with USB connector for plug-and-play connection to a PC ■ SCC1-Analog Sensor Cable with 0-10 V voltage output. ■ Fluidic connection material...

Important Notices Warning, personal injury Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result in personal injury (including death). Do not use this product for applications other than its intended and authorized use. Before installing, handling, using or servicing this product, please consult the datasheet and application notes. Failure to comply with these instructions could result in death or serious injury. If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer...