Plug n Grow PNG060 CO2 Controller with High-Temp Shutoff

What the Plug n Grow PNG060 Controls and How Hard

Switching capacity is the first number to look at on any controller of this type. This one carries fifteen amps at a hundred and twenty volts on a sixty hertz supply. That is a heavier rating than several competing single task units manage. That headroom is what decides whether a burner or a large regulator assembly can be driven directly. The set point is adjustable from 400 ppm, which is roughly outside air, up to 2100 ppm. Ambient level shows on the display continuously rather than only when a menu is opened. Day and night detection is built in, so injection stops when the room goes dark and no external timer needs keeping in step. A differential setting controls how far the level falls before injection restarts. Calibration runs from a single button. The unit is made in North America and carries a three year warranty, which is longer than most of this category offers.

The High Temperature Shutoff and Why It Matters

This is the feature that separates the PNG060 from a plain set point controller. A second threshold, adjustable anywhere from 50 F to 130 F, stops carbon dioxide enrichment once the room reaches it. The reasoning is worth spelling out. Enrichment only pays while a crop is photosynthesising well, and a room that has run hot is already past that point. Injecting more gas into it achieves nothing and costs money. Worse, enrichment usually means the extraction is shut, so a room that is heating is a room with nowhere for the heat to go. Cutting the gas at a temperature limit lets extraction take over. Set it against the temperature at which the room genuinely loses performance rather than at a round number. Treat it as a backstop rather than as climate control, because this controller stops the gas and does nothing about cooling. Anything more than that needs a separate device on the extraction or the air conditioning.

Key Features

• Set point range: Four hundred to twenty-one hundred parts per million
• Display: Ambient carbon dioxide shown continuously
• Day and night: Detected by the unit, so injection stops in darkness
• Differential: Adjustable, controlling how far the level falls before restart
• Temperature shutoff: Adjustable from fifty to a hundred and thirty Fahrenheit
• Why the shutoff: A hot room gains nothing from more gas and needs extraction
• Calibration: Runs from a single button
• Electrical: Fifteen amps at a hundred and twenty volts, sixty hertz
• Warranty: Three years from the manufacturer
• Origin: Made in North America

Technical Specifications