HAM PoolSense

The HAM PoolSense monitors the water quality of a pool. It measures pH, ORP and temperature, and calculates free chlorine. It is for private pools, hotels, spas and commercial facilities.

The serial number starts with e35: or e5:. Only e5: devices have outputs for dosing pumps.

What it measures

Reading	Unit	Note
pH		0-14
ORP	mV	Oxidation-reduction potential. It shows how well the water is disinfected
Free Chlorine	ppm	Calculated from pH and ORP. It is not a direct measurement
Temperature	°C	Water temperature

Typical uses

• Private pools.
• Pools in hotels and commercial facilities.
• Spas.

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 sensors go into the water (IP68).
• The device gets 12 VDC power via terminals.
• Put the device in a dry place, for example in the pool plant room.

For installation in an existing pool circuit, contact us.

Settings

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

• Calibration table (in Advanced): field correction. There is a table for temperature, pH and ORP. Tap Calibrate to fill it in.
• Include in summary views: the device shows in the summary views on the home page.
• 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): the device uses only IPv4 connections.
• Do not keep track of data (in Advanced): the app keeps no reading history.

Calibration

The pH and ORP sensors wear with time. If the values change slowly for no reason, calibrate them.

1. On the Calibration table row of the reading, tap Calibrate.
2. Read the warning and accept it.
3. Put the sensor in a solution with a known value.
4. On a table row, tap Use current.
5. In the Reference column, type the known value of the solution.
6. Tap Submit.

Caution

If you change the values in the calibration table, HAM Systems cannot guarantee the accuracy of the readings.

Controls

The e5: devices have three outputs for dosing pumps:

Output	Use
PH+	Pump to increase pH
PH-	Pump to decrease pH
ORP+	Pump to increase ORP

Each output is a switch on the device page. You can turn it on or off from the app, or automatically with a rule. See Control outputs.

Danger

Dosing pumps add chemicals to the water. Do not use the pool when the dose is not correct. Check the water regularly with a test kit.

The e35: devices have no outputs. They only measure.

Recommended rules

The Recommended setups button in the Notifications and Automation section of the device page suggests:

• An alert when the temperature goes out of range.
• An alert when the device stops sending data for 15 minutes.

Also create rules for pH and ORP out of range. See Your first alert and Offline alerts.

Troubleshooting

What you see	Possible cause	What to do
pH or ORP changes slowly for no reason	The sensor is worn or needs calibration	Calibrate. If this does not correct it, replace the sensor
Free chlorine is different from the test kit	It is a value calculated from pH and ORP	Calibrate pH and ORP

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

Specifications

pH range	0-14
ORP range	-1999 to +1999 mV
Accuracy	±0.02 pH, ±1 mV
Stability	≤0.01 pH/24h, ≤2 mV/24h
Sensor operating temperature	0 to 60 °C
Sensor protection	IP68
Device operating temperature	-10 to 50 °C
Device dimensions	55 x 44.1 x 21.5 mm
Power	12 VDC via terminals
Connectivity	WiFi 802.11 b/g/n, 2.4 GHz

See the shop for availability. To measure only pH, see HAM pHSense.