In my hunt for a dual tent temperature controller (one for veg, one for flower) I came across a hidden gem – the Pymeter 2-in-1 temp controller.

I needed to add another two temperature controllers to my grow when I came across the Pymeter Digital Temperature Controller. I was interested because it was less than the price of a single Inkbird Temperature Controller (of which I own 6) and since it has two independent temp probes it can replace two temp controllers. That is unbeatable value… especially since most growers will have a flower tent and a veg tent that require independent cooling systems. My preferred settings are 60-68F in the flower tent (cooler towards harvest) and a constant 70-76F in the veg tent.

Setup Guide

I decided to use the Pymeter to replace two temp controllers I already had running, freeing them up for other uses. Setup was not as intuitive as the Inkbird units but is fairly straight forward when you figure it out. To set the unit up in cooling mode the ON temperature needs to be greater than the OFF temperature.

For example if 1 = flower tent and 2 = veg tent settings are as follows:

1ON: 72F
1OFF: 70F
2ON: 62F
2OFF:60F

I found setting a two degree gap between on/off was the perfect balance of maintaining a constant temperature without having the fan cycle on/off too frequently.

Once the unit is operation the top value reflects the present value (PV) in for probe one, and the bottom value is PV for probe two. To see the set value you need to go into the settings (unlike with the inkbird units which display both)

Accuracy Test

I used my Govee Smart Temp Monitor to log the temperatures after installing the Pymeter. The 2 degree buffer between on/off worked perfectly. My fans were cycling on every 20 or so minutes in the veg tent and were pretty much constantly on in the flower tent. This is greatly influenced by the ambient temperatures outside of the tent. In late winter I expect to see much more cycling on the flower tent as the controller will have to work harder to keep air temp in range.

Things I Use Temperature Controllers For:

• Flower tent exhaust fan
• Veg tent exhaust fan
• Heater in drying room
• Deep freezer converted into keg fridge (keezer)
• Powering fish tank heater for warming up DWC nutrient water in the winter
• Controlled temperature fermentation
• Powering window fan in cold room

Conclusion

After testing this device I can confidently say this is the best grow tent temperature controller on the market. Even if you only have one tent it is cheaper than a Inkbird single controller… but you have the option to add a second fan/tent down the road.