The current Tonick and Underhill brochure is here attached. Pricing for 2020 remains the same as 2019 New products, not includec in the brochure may be found in the news section on this site Underhill_20PgCatalog_2018_EmailVersion

Over the next few years, you will see increasing references to TWL-Irrigation, when searching for Tonick or Tonick Watering. TWL-Irrigation seamelessly handles all the Tonick and Underhill products in Europe, whilst, elsewhere in the the world,  Aquamonix in Australia, sells 2wire products under its Tonick Watering label. TWL-Irrigation & Tonick. Same support; same products; gentle […]

We will be exhibiting at BTME 2020. Please come and visit us at our stand 141, in the Blue Zone.  We will all be available for sales advice and Tony will also be available for any technical help. Look forward to seeing you there!  

The TWL Irrigation Sender decoder allows SDI-12 sensors to be interfaced into the 2wire path. SDI-12 is an industry standard protocol used by many environmental sensors.  This include: Multi-level soil moisture and temperature Leaf wetness Weather stations Pyranometer Rainfall measurement ETo The SDI-12 sender decoder may be used on the same 2wire path, alongside valve […]

The COMBO or HYBRID decoder combines a valve solenoid on/off control, a pressure sensor input and two alternative flow inputs;  one for Woltmann-type contact closure flow meters and the other for pulse-type variable frequency open-collector flow meters. Housed in a water-tight encapsulated tube, the combination decoder may use any or all the inputs and outputs.  […]

4-20mAsenderDataSheet3 A new sensor decoder which attaches to the valve decoder’s 2-wire path, measures sensors that produce 4-20mA outputs. To avoid ground loops and to protect against lightning, the 4-20mA input is galvanically isolated by up to 5KV peak from the 2-wire path. The results from the measurement are reported in 14-bit resolution. A software […]

Our stand at BTME 2019.  We had a great show, with some very positive sales leads.  We hope all our customers did too.

We will be exhibiting at BTME 2019. Please come and see us at our stand 115, in the Blue Zone.  We will all be available for sales advice and Tony will also be available for any technical help. See you there!!        

An updated and abbreviated manual is in Application notes. This covers the most common faults and how to find them  

TWLIrrigationLtdPrivacyPolicy In line with the new data protection law that comes into effect on Friday 25th May 2018, we have issued our new Privacy Policy.  To find out more, please download and read it. Thank you.