Downloads/Data Sheets

Welcome to the Harwil Downloads Page. Here you will find the most current copies of our technical data sheets. There’s nothing worse than needing to download something on a website, but not being able to find it. Harwil Product Installation Instructions are located on each product's information page.

Click on the link to view the PDF in your browser, or right click on it and save it to your hard drive.

If you have any questions or special requests, you can reach us through our contact page.

Full Catalog Level Switches
Catalog – Harwil’s complete line of fluid control products. L-5, L-5SS – Heavy Duty brass or stainless
Line Card – A brief overview of Harwil Fluid Control Switches L-8N, L-8CR – Adjustable for a range of specific gravities
Flow Switches L-21N, L-21VCR, L21 PLUS – The “Industry Standard” wide differential level switch.
Q-1 – In-line ½ inch low flow detection. L-30N, L-30CR – Level switch for almost any fluid or slurry
Q-4E – In-line 1 inch low flow detection. L-40N, L-40VCR – Versatile compact level switch for horizontal and vertical uses
Q-5 and Q-5SS – The most durable flow switch ever built. Controllers 
Q-8N and Q-8CR – Adjustable medium duty for drinking water or chemicals CF-8 – Chemical Feed Pump Controller Medium – Heavy Duty
Q-8DS and QD-8DS – Low cost medium duty for drinking water or chemicals CF-12 – Chemical Feed Pump Controller with 2 or 4 120V outlets
Q-10N and Q-10VCR – Super or standard sensitive 1 inch reed switch. CF-112 – Chemical Feed Pump Controller with Indicator Lights
Q-12N, Q-12DS & Q-12VCR – The “Industry Standard” ½ or ¾ reed switch.  
Q-16SS – Paddle style 1 inch brass 15 Amp switch