Environmental sensors
Soil moisture and temperature sensors
Your Harvst mini-greenhouse comes with two black dual-purpose sensors, which will
measure soil moisture as well as soil temperature. These are best placed in an area
where the temperature and moisture doesn’t change too fast; such as a large container
of soil, or the ground. It’s best placed horizontally, just under the surface.
The first soil sensor is what drives the irrigation (and optional heating) for zone 1. The
second sensor (with the red band around it), is used to monitor zone 2.
We recommend that the
bottom
shelf and base of your mini-greenhouse is
zone 1
(watered by the two sprayer bars) and the
top
shelf is
zone 2
(watered by the mister
bar).
The soil sensors plug into the 4-pin connector on the control unit, via a Y-splitter.
To measure the soil moisture, place the sensor so that the bottom half is completely
under the soil. In shallow soil (such as a seed tray), you’ll need to place the sensor on
its side under the soil.
The temperature is measured by a device halfway up the body of the sensor; again, if
you have shallow soil and want to measure the temperature of the soil itself, this will
need to be below the surface.
Air temperature sensor
A silver temperature-only sensor comes pre-wired into your control box. You can use
this to monitor any temperature; typically it’s used for outside air temperature, and
will show as “air temp” on the app.
WARNING
Do not plug or unplug the dual purpose sensors while the control unit is turned on.
