3x3 Tent Setup

Maker Scream said:

I’m sucking air from an air conditioned room with my sensor at plant height, in direct light. Not sure what you mean by uncovered. Tent stays closed

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Radiant heat isn’t the same as air temperature, when we leave a sensor out in direct light the infra red from the light warms up the sensor to a higher temperature than the surrounding air temperature. I cover mine with a toilet roll tube lol. This used to be a much bigger problem when using hps that has a lot of infra red, not so much now I use leds but the difference between a shaded sensor and a sensor in direct light is still noticeable. I’m not saying that the radiant heat shouldn’t be monitored too but I usually do this with an infra red thermometer pointed at the leaves.

Blue brother said:

Radiant heat isn’t the same as air temperature, when we leave a sensor out in direct light the infra red from the light warms up the sensor to a higher temperature than the surrounding air temperature. I cover mine with a toilet roll tube lol. This used to be a much bigger problem when using hps that has a lot of infra red, not so much now I use leds but the difference between a shaded sensor and a sensor in direct light is still noticeable. I’m not saying that the radiant heat shouldn’t be monitored too but I usually do this with an infra red thermometer pointed at the leaves.

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There are a couple IR lights on my led. It makes sense, after hearing it. I’ll give your hack a shot. I’m going to go ahead and guess at 5 degree difference. You wanna take the Over or the Under?

Maker Scream said:

There are a couple IR lights on my led. It makes sense, after hearing it. I’ll give your hack a shot. I’m going to go ahead and guess at 5 degree difference. You wanna take the Over or the Under?

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I work in Celsius and my hlg diablos don’t have any ir diodes but have 660nm, I know there is IR in the spectrum because I can feel it on my hand when I put it underneath the boards, but in my set up with the light 12inches ish away from the sensor the difference is about 2c.

here’s the weird bit, VPD,without much infra red I’m forced to run a heater and set the air temp high point at 30c, this allows the leaf to be sufficiently warmed to allow for the appropriate transpiration rate for each stage of growth.

If I were to set my room at 28c with only my leds on then the leaf temperature is around 2c cooler than the surrounding air due to water passing through it and cooling It down.

I actually use an hps in the Center of the tent from week 2 ish of flowering which (with its large ammount of IR) warms the leaf significantly which in turn forces the plant to transpire more, increasing the VPD without having to run my room at 30c.

Out of curiousity, is anyone running multiple fans and controllers from the same app? Like a veg room and a flower room? If so what does it look like on the app? A screenshot would be helpful. Thanks in advance guys.