{"product_id":"control-over-humidifier-devices-for-both-day-night","title":"G.A.S. Day \u0026 Night Humidity Controller","description":"\u003csection class=\"gh-product-listing\"\u003e\n\u003ch2\u003eG.A.S. Day \u0026amp; Night Humidity Controller — Light-Sensing Humidifier Automation\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Growers who need to dial in separate humidity levels for lights-on and lights-off, without the complexity or cost of smart controllers\u003c\/p\u003e\n\u003cdiv aria-label=\"Our thoughts\" role=\"note\" class=\"gh-our-thoughts\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOur thoughts\u003c\/strong\u003e\u003cbr\u003eDead simple, genuinely useful, and won't break the bank. If you're running a humidifier and want it to do different things during day and night phases, this does the job without any faffing about with apps or batteries. One we sell a lot of for growers at the early stages of their setup.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe G.A.S. Day \u0026amp; Night Humidity Controller is a \u003cstrong\u003elight-sensing humidifier controller\u003c\/strong\u003e that automates moisture levels based on your grow lights. It uses a built-in photocell sensor to detect when your lights are on or off, then switches between two separate humidity settings you've dialled in — one for day, one for night. No WiFi. No apps. No faffing. Just straightforward humidifier automation that actually works.\u003c\/p\u003e\n\u003ch3\u003eWhy day and night humidity control matters\u003c\/h3\u003e\n\u003cp\u003eHumidity doesn't stay static through a light cycle. During lights-off, your plants are still transpiring, temperatures drop, and relative humidity naturally climbs. Without separate night-time control, humidity can spike and create the perfect conditions for mould and mildew — especially during propagation or in sealed spaces.\u003c\/p\u003e\n\u003cp\u003eA controller handles this for you automatically. Instead of manually turning a humidifier on and off every 12 hours (or worse, leaving it running all night and risking problems), you set your targets and walk away. Lower anxiety. Better results. Less babysitting.\u003c\/p\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLight sensing\u003c\/strong\u003e\u003cbr\u003eThe integrated photocell probe sits in a well-lit area of your grow room and detects whether your lights are on or off. It switches between your day and night settings in real time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual dials\u003c\/strong\u003e\u003cbr\u003eLeft dial = daytime humidity target. Right dial = night-time humidity target. Both adjustable across the full range. Set once, forget it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVisual feedback\u003c\/strong\u003e\u003cbr\u003eA green LED lights up when the humidifier is switched on, so you can see at a glance whether it's working. A rapidly flashing LED indicates a sensor issue (replacement sensors are available if needed).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible with your existing humidifier\u003c\/strong\u003e\u003cbr\u003eYou plug your humidifier into the controller. The controller switches it on and off based on humidity levels and light cycles. That's it.\u003c\/p\u003e\n\u003ch3\u003eHow it compares\u003c\/h3\u003e\n\u003cp\u003eThis sits in the \u003cstrong\u003eentry-level automation\u003c\/strong\u003e bracket of humidity controllers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. manual control:\u003c\/strong\u003e You're no longer adjusting settings twice daily. Frees up your time, removes human error.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. smart controllers (WiFi\/app-based):\u003c\/strong\u003e You lose remote monitoring and fancy integrations, but gain simplicity, reliability, and a much lower price. No batteries. No software updates. No cloud dependency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. basic on\/off timers:\u003c\/strong\u003e Unlike a simple timer, this actually responds to humidity levels AND light cycles simultaneously. Much smarter than just guessing timings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn plain terms: if you want day\/night humidity control without paying for features you won't use, this is the move.\u003c\/p\u003e\n\u003ch3\u003eUsage guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEarly-stage propagation (seedlings, cuttings)\u003c\/strong\u003e\u003cbr\u003eSet daytime to 70-75% humidity, night-time to 65-70%. Young plants need higher moisture levels and this controller will maintain them without you having to constantly fiddle with the humidifier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVegetative growth\u003c\/strong\u003e\u003cbr\u003eDial in 50-60% day, 45-55% night. As plants mature, humidity demand drops — the controller handles the switch automatically when your lights turn off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLate flowering\u003c\/strong\u003e\u003cbr\u003eRun 40-50% day, 35-45% night. Lower humidity reduces disease risk. Again, no manual adjustment needed — just set it once and it works.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProbe placement\u003c\/strong\u003e\u003cbr\u003ePosition the sensor probe in a well-lit area of your grow room, ideally somewhere that gets full light exposure when your lights are on. Poor placement = poor readings. Avoid shadows, blocked areas, or anywhere tucked away.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e G.A.S. (Global Air Supplies)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl type:\u003c\/strong\u003e Day \u0026amp; Night Humidity Controller (humidifier version)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e Light-sensitive photocell probe (integrated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating mode:\u003c\/strong\u003e Dual independent dials — left for daytime, right for night-time humidity targets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity adjustment:\u003c\/strong\u003e Adjustable range across both day and night settings (full range)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Humidification control only — this version adds moisture. A separate dehumidifier controller is available if you need to remove humidity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput indicator:\u003c\/strong\u003e Green LED (lights when humidifier is active; rapid flashing indicates sensor fault)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDevice compatibility:\u003c\/strong\u003e Works with any standard humidifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower requirement:\u003c\/strong\u003e Standard mains plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement parts:\u003c\/strong\u003e Sensor probes available separately if needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGrowers running propagation or cloning setups who need stable high humidity without constant manual adjustment\u003c\/li\u003e\n\u003cli\u003eBudget-conscious growers wanting to automate humidification without smart-controller pricing\u003c\/li\u003e\n\u003cli\u003eAnyone preferring simple analog control over WiFi apps and cloud dependency\u003c\/li\u003e\n\u003cli\u003eGrowers in their first or second year who want reliability without complexity\u003c\/li\u003e\n\u003cli\u003eSmall-to-medium grow spaces where a single humidifier covers the area\u003c\/li\u003e\n\u003cli\u003eAnyone already running a humidifier who wants to make it smarter without replacing it\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBest suited to setups where \u003cstrong\u003estraightforward automation and proven reliability matter more than app integration and advanced features\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003eThis is proper kit at a sensible price. Day and night humidity control is genuinely useful — it prevents the mould risk that comes with lights-off humidity spikes, and it saves you from babysitting a humidifier manually. The photocell sensor works reliably, the dials are straightforward, and there's no dependence on batteries or software.\u003c\/p\u003e\n\u003cp\u003eIf you're setting up propagation, early-stage growing, or just want to automate a humidifier without overcomplicating things, this is worth picking up while stock lasts. Does exactly what it should, day in, day out.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"GAS UK","offers":[{"title":"Default Title","offer_id":47916429279402,"sku":"500028","price":89.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/5540\/5400\/files\/500028-Humidifier_f9859e5c-62bf-43a6-a6a6-9525edea98d1.jpg?v=1769193334","url":"https:\/\/growershouse.co.uk\/products\/control-over-humidifier-devices-for-both-day-night","provider":"Growers House ","version":"1.0","type":"link"}