LabTube is no longer active

LabTube is no longer accepting new video uploads, and will shortly be rolled down.

On our parent publication, Technology Networks, you’ll be able to find videos covering a range of topics across the life sciences, applied markets, analytical sciences, drug discovery and more. Click here to learn more.

A field water autosampler controlled using Android tablet or smartphone -



October 1, 2020

  • Share
    Automated water sampling can be very useful, but open-source choices are limited. Here I present an autosampler which consists of a gantry robot that delivers water from a syringe pump to 24 capped 40 ml vials. The autosampler is controlled using an Android tablet automatized using Macrodroid. Three rinsing cycles ensure negligible carryover between consecutive samples. Hourly sampling from a creek under rainy conditions suggested that total organic carbon in water was diluted by the rain. Some important limitations: 1) the autosampler must be on a steady, flat, horizontal surface; 2) unattended sampling can only last as long as the batteries powering the tablet and the motors; 3) distance from the syringe pump to water cannot exceed ~2 m in height and ~4 m in length for 3 mm tubing; 4) sampling frequency does not exceed one sample every eleven minutes. However, because of its open design, the autosampler can be modified and improved to not only overcome these limitations, but also potentially expand its scope to more demanding sampling if necessary.

    AutomationEnvironmental MonitoringInformatics

    Keep up to date with all your favourite videos and channels.

    Get personalised notifications on new releases and channel content by subscribing to the LabTube eNewsletter.