HAM FlowSense

The HAM FlowSense measures how much liquid goes through a pipe and how fast. Use it when you want to see water consumption and know at once about leaks or sudden changes. It works with a flow sensor that sends pulses, for water and also for other liquids such as oil or milk.

The serial number starts with e28: (HAM FlowSenseS). The older version starts with 28:.

What it measures

Reading	Unit	Note
Liquid	L	Total quantity that went through
Liquid flow rate	L/min	Current flow
Liquid (Daily), (Weekly), (Monthly), (Since ref.)	L	Consumption per period. Only on the older version (`28:`)
Gen. In., Gen. In. 2		Two general inputs. They show when you configure them

For consumption per day, week or month, see also Charts and Reports.

Typical uses

Water consumption in businesses, hotels and homes.
Detection of leaks and unusual consumption.
Flow measurement of other liquids, such as oil or milk.

Installation

The device connects to WiFi 2.4 GHz. You set it up from the HAM app, as described in Connect a device to WiFi.

The flow sensor goes into the pipe. Any professional plumber can install it.
Select a sensor with the same thread as your pipe: G1/2”, G3/4” or G1”.
Do not install the sensor where frost can occur.

For general installation guidance see Sensor placement and wiring.

Install a filter at the inlet of the sensor. This keeps particles and debris out of the sensor.

The terminal order is different between versions of the device. Connect the sensor as the manual of your device shows.

Settings

The settings are on the device page, in the Settings section. For the general procedure see Device settings.

Pulses per Litre (in Advanced): how many pulses the sensor sends for each litre. HAM sets the value for the sensor that it supplies. Change it only if you connect a different meter.
Device Description: text that shows as a subheading in reports.
General input is alarm output (in Advanced): the last general input becomes an alarm output.
Alarm buzzer mode (in Advanced, e28: only): the device sounds while an alarm is active.
Allow LAN commands (in Advanced): other devices on your local network can control this device. Keep the setting off if you do not need it.
Force IPv4 (in Advanced, e28: only): the device uses only IPv4 connections.
Do not keep track of data (in Advanced): the app keeps no reading history.

Connect to an alarm system

The device can give a 3.3 VDC output (maximum 10 mA) while an alarm is active. This output can drive a dry contact relay, for example to an alarm panel. Do not connect a load directly to the output.

Recommended rules

The app has no ready-made rules for this device. Create at least these:

An alert when Liquid flow rate stays above 0 for a long time, for example at night. This shows a leak.
An alert when Liquid flow rate goes above a limit.
An alert when the device goes offline. See Offline alerts.

For the steps see Create a rule.

Troubleshooting

What you see	Possible cause	What to do
The flow stays at 0 while water runs	A problem in the sensor wiring	Check the sensor cables
The quantity is much too high or too low	Wrong Pulses per Litre	Contact us for the correct value
The reading is not accurate at very low flow	The flow is below the sensor range	The accuracy applies to 2-30 L/min

For general problems see Wrong or strange values and Device shows offline.

Specifications


Sensor	Hall effect flow sensor, thread G1/2”, G3/4” or G1”
Flow range	1-30 L/min
Accuracy	±5% (2-30 L/min)
Maximum pressure	1.75 MPa
Operating conditions	No frost
Alarm output	3.3 VDC, maximum 10 mA
Power	Micro-USB adapter (included) or 5-12 VDC via terminals
Connectivity	WiFi 802.11 b/g/n, 2.4 GHz
Device operating temperature	-10 to 55 °C (5 V), -10 to 40 °C (12 V), 5-90% RH
Enclosure dimensions	55 x 44.1 x 21.5 mm

Available in the shop.

Documents

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