Flow Meter SLQ-HC60 for Hydrocarbons0 pages

Preliminary Datasheet SLQ-HC60 Milliliter Flow Meter for Hydrocarbons - Maximum flows up to 80 ml/min - Sensitive to lowest flows - Straight flow path, no moving parts - Fast response time: < 50 ms - Optimized for hydrocarbons 1 Introduction SLQ-HC60 The SLQ-HC60 Liquid Flow Meter enables fast, non invasive measurements of liquid flow up to 80 ml/min. This product line is especially suited for process monitoring applications in automation technology which require high sensitivity in the milliliter range. It is suited for use with almost all hydrocarbons, as for example, alcohols, oils, gasoline, diesel, etc. and many other chemicals. Excellent chemical resistance is ensured: The flow path of the SLQ-HC60 Liquid Flow Meters is formed by a simple, straight glass capillary. This Swiss made, non invasive flow meter is based on Sensirion's patented CMOSens® Technology (US Patent 6,813,944 B2). An internal fourth generation MEMS sensor chip combines a thermal high precision sensor element with amplification circuits and digital intelligence for linearization and temperature compensation on one single microchip - the product's core element. 2 Sensing Performance In Table 1 the flow sensor's performance for use with Isopropyl Alcohol (IPA) is given. For other hydrocarbons the values will be slightly different as the performance depends on the medium used. Due to the optimized output signal the repeatability is nearly constant over a wide flow range. The repeatability depends on the integration timea of the analog signal acquisition. Longer integration time leads to better repeatability of the flow measurement (see table 1). The temperature compensation is optimized for use with IPA and shows very good performance for most hydrocarbons and other media. Table 1 : Model specific performance of SLQ-HC60 for IPA (all data at 20°C, 1 barabs unless otherwise noted) Parameter Condition SLQ-HC60 Units Maximum Flow Rate Best Performance 80 ml/min Reduced Performance 100 0.2 sec integration time 1.5 % m.v. Repeatabilityb 0.2 % F.S. (whichever is greater) 2 sec integration time 1 % m.v. 0.07 % F.S. Flow Detection Response Time < 50 ms Accuracyc 10 % m.v. Response Time On Power-Up 120 ms Mounting Orientation Sensitivityd For IPA 0.25 ml/min Operating Temperature Temperature Compensated +10...+40 °C Functional +0 ... +55 °C Ambient storage temperature (empty flow channel) -10...+60 °C a This refers to the time over which the analog acquisition device averages the input signal. Refer to the datasheet of your device. b For medium IPA using 1 a standard deviation of consecutive flow measurements. c With IPA, 2.5-80 ml/min, after conversion of the Vout signal via the logarithmic relation. See section 3.1 d Normal position: Horizontal Flow channel, connector horizontally. www.sensirion.com May 2009 Preliminary Information _ V0.83 1/6