Most flow meters have two parts:
1. The meter itself, which is a device connected to the pipe work that is designed to guide water. They generally come with dials on top so that flows can be read.
2. Register type, which is the device mounted onto the meter as described in 1 that provides a signal that can be read by controllers and other devices. There are many variants, as you can see below. Hydrawise must have a “True Pulse” or “Reed Switch” register type.
Other than Hunter HC controllers, at this time we can also recommend using Netafim products. However, you must specify whether you want a Reed Switch register type. You can use any size. You are not restricted to a pulse rate of one pulse per gallon, and you can set this for any pulse rate using our custom sensor feature.
The Hydrometer can be used but must have a Reed Switch register type fitted.
So what type of pulse rate do you want for your Reed Switch?
Netafim offers two for the smaller meters: 0.1 gallon per pulse or 1 gallon per pulse.
Here's the rough way to work out which pulse rate to use: We aim to have a minimum of 10 pulses per min and a maximum of 120 pulses per min, so if the flow rate was 10 gal per min then a one pulse per gal is OK.
Here is a list of suitable flow meters:
Flow meter 1: With a Reed Switch output.
Flow meter 2: This is the same meter that Netafim sells.
Flow meter 3: With a Reed Switch and suitable pulse rate to ensure a minimum of 10 pulses per min and no more than 60 pulses per min, or as close as you can get.
The flow meter you are going to use must meet the requirements above. Otherwise, the software will not read the flow data.