HAM PARSense
The HAM PARSense measures the light that plants use for photosynthesis. It is for greenhouses, indoor farms and research nurseries.
The serial number starts with e32:. In the app the device shows as HAM PARSenseS.
What PAR is
Section titled “What PAR is”Plants do not use all light. They use the visible light, from 400 to 700 nm. PAR measures only this light. The unit is μmol/m²s: how many photons fall on one square metre each second. A reading in lux is for the human eye. It does not tell you how much light the plant gets.
What it measures
Section titled “What it measures”| Reading | Unit | Note |
|---|---|---|
| PAR | μmol/m²s | The light for photosynthesis. |
Typical uses
Section titled “Typical uses”- Greenhouses, to control shading and artificial lighting.
- Indoor farms with LED lamps.
- Plant research.
Installation
Section titled “Installation”- Put the sensor at the height of the leaves, with its surface level and facing up.
- Connect the device to WiFi from the mobile app. See WiFi setup.
Settings
Section titled “Settings”In Settings > Advanced:
- Calibration table: a field correction for PAR. Press Calibrate to fill it in.
The general settings of all devices are in device settings.
Recommended rules
Section titled “Recommended rules”The app does not suggest ready rules for this device. You can make a rule, for example to turn on the lights when the PAR goes below a limit. See Create a rule.
Troubleshooting
Section titled “Troubleshooting”- Low values: clean dust and water from the surface of the sensor.
- The device is offline: see device offline.
Specifications
Section titled “Specifications”| Connectivity | WiFi 2.4 GHz |
| Marks | CE, WEEE, RoHS |
To buy, see the shop.