[{"data":1,"prerenderedAt":308},["ShallowReactive",2],{"blog-\u002Fblog\u002Fwhere-to-place-cold-storage-sensors":3,"$fgqgyw6aqmywc":178},{"id":4,"title":5,"author":6,"body":7,"category":162,"date":163,"description":164,"extension":165,"featured":166,"meta":167,"navigation":168,"path":169,"readingTime":170,"seo":171,"stem":172,"tags":173,"__hash__":177},"blog\u002Fblog\u002Fwhere-to-place-cold-storage-sensors.md","Where to place sensors in a walk-in (and where not to)","FreshControls",{"type":8,"value":9,"toc":152},"minimark",[10,14,19,22,25,42,46,49,75,79,82,102,106,109,128,132,149],[11,12,13],"p",{},"The fastest way to lose trust in a monitoring system is to mount the sensors in the wrong spot.\nA reading that swings ten degrees every time the compressor cycles, or a \"freezer\" sensor\nsitting in the warmest pocket of the room, teaches everyone to ignore the alerts. This is a\nfield guide to placement — the decisions that make a reading mean something.",[15,16,18],"h2",{"id":17},"measure-the-product-not-the-air","Measure the product, not the air",[11,20,21],{},"The number you actually care about is the temperature of what you're storing, not the air\naround it. Air temperature reacts instantly to a door opening or a defrost cycle; product\ntemperature moves slowly. If your alarms are tuned to raw air readings, you'll chase false\nalarms every time someone opens the door for thirty seconds.",[11,23,24],{},"Two ways to get closer to product temperature:",[26,27,28,36],"ul",{},[29,30,31,35],"li",{},[32,33,34],"strong",{},"Use a buffered probe."," A probe in a glycol or glycerin buffer bottle tracks how the product\nresponds, not how the air spikes. It's the single biggest upgrade you can make to a cold-room\nsensor, and it turns a jumpy reading into a stable one you can set a threshold against.",[29,37,38,41],{},[32,39,40],{},"Place at the point of risk."," Put the sensor where the product is most likely to go out of\nrange — not where it's easiest to reach. In most walk-ins that means away from the evaporator\nand away from the door.",[15,43,45],{"id":44},"where-readings-lie","Where readings lie",[11,47,48],{},"A few spots consistently produce readings that don't represent the room:",[26,50,51,57,63,69],{},[29,52,53,56],{},[32,54,55],{},"Directly under the evaporator fan."," You'll read the coldest, most turbulent air in the\nspace, punctuated by warm defrost cycles. It's the least representative spot in the room.",[29,58,59,62],{},[32,60,61],{},"Beside the door."," Every door opening dumps warm, humid air right onto the sensor. You'll\nsee spikes that the product two meters away never experiences.",[29,64,65,68],{},[32,66,67],{},"Against an exterior wall or on the floor."," Walls and floors have their own thermal\nbehavior and pool cold air. Mount at product height, on an interior surface.",[29,70,71,74],{},[32,72,73],{},"Buried behind stock."," A sensor walled in by pallets reads a dead-air pocket and can't be\nserviced. Keep it accessible and in circulating air at the product zone.",[15,76,78],{"id":77},"match-the-device-to-the-space","Match the device to the space",[11,80,81],{},"Placement and hardware choices go together:",[26,83,84,90,96],{},[29,85,86,89],{},[32,87,88],{},"Within reach of an access point,"," a Wi-Fi sensor mounts anywhere you have coverage and\njoins on its own. The catch is that freezer walls and racking eat Wi-Fi quickly — test the\nsignal at the actual mounting spot, not from the doorway.",[29,91,92,95],{},[32,93,94],{},"Deep freezers, far corners, and outbuildings"," are where long-range LoRa earns its keep.\nA gateway can extend coverage where the existing Wi-Fi network is limited. Test the actual\nmounting points with doors closed and normal stock in place; metal walls and racking affect\nboth radio systems.",[29,97,98,101],{},[32,99,100],{},"Racks with existing probes and door contacts"," are a job for a multi-input board. One board\nfolds several thermistors, a door switch, and an analog signal into the same fleet, so you're\nnot hanging a separate wireless sensor on every unit.",[15,103,105],{"id":104},"dont-forget-the-door-and-the-power","Don't forget the door and the power",[11,107,108],{},"Temperature is the headline, but two other signals catch problems before the temperature ever\nmoves:",[26,110,111,122],{},[29,112,113,116,117,121],{},[32,114,115],{},"Door contacts."," A propped or failed-to-latch door is the most common cause of a slow\nexcursion. Monitoring the door tells you ",[118,119,120],"em",{},"why"," a reading is drifting, often before it drifts.",[29,123,124,127],{},[32,125,126],{},"Power."," A monitored power signal turns \"the freezer is warming up\" into \"the freezer lost\npower at 2:14 a.m.\" — which is the difference between a mystery and a work order.",[15,129,131],{"id":130},"a-quick-placement-checklist","A quick placement checklist",[26,133,134,137,140,143,146],{},[29,135,136],{},"Is the sensor at product height, in circulating air, away from the fan and the door?",[29,138,139],{},"Are you buffering the probe so it tracks product, not air spikes?",[29,141,142],{},"Did you test connectivity at the real mounting location, inside the closed door?",[29,144,145],{},"Is the sensor accessible for a battery change without moving stock?",[29,147,148],{},"Are you also watching the door and, where it matters, the power?",[11,150,151],{},"Good placement is unglamorous, but it's what separates a system people trust from one they mute.\nGet the sensor reading the right thing, and every threshold, alarm, and audit record downstream\ngets more honest.",{"title":153,"searchDepth":154,"depth":155,"links":156},"",2,3,[157,158,159,160,161],{"id":17,"depth":154,"text":18},{"id":44,"depth":154,"text":45},{"id":77,"depth":154,"text":78},{"id":104,"depth":154,"text":105},{"id":130,"depth":154,"text":131},"Field notes","2026-07-08","A field guide to sensor placement in coolers and freezers, so your readings reflect the product instead of the nearest air vent or door.","md",false,{},true,"\u002Fblog\u002Fwhere-to-place-cold-storage-sensors","7 min read",{"title":5,"description":164},"blog\u002Fwhere-to-place-cold-storage-sensors",[174,175,176],"hardware","cold-chain","installation","Uh0icFQdX6xULRgd-L7GyOKExegQedNiHvok14vwG0c",{"currency":179,"version":180,"source":181,"plans":182,"deviceClasses":231,"hardware":270,"faqAnswers":298,"guarantee":301,"personas":307},"USD","seed-2026-09-01","seed-stub",[183,200,216],{"sku":184,"name":185,"tagline":186,"base":187,"cadence":189,"highlighted":166,"ctaLabel":190,"ctaKind":191,"features":192,"footnote":199},"essential","Essential","Core monitoring for a growing fleet. Pay only for the devices you connect.",{"amountCents":188,"currency":179},0,"month","Get started","signup",[193,194,195,196,197,198],"Real-time temperature, humidity, door & power readings","Multi-step escalation ladders by email & SMS, with acknowledge-or-escalate routing","Live status-first dashboard across every site you run","Unlimited team members with role-based access","Up to 25 connected devices","1-year reading history, exportable as CSV; 5- and 9-year retention add-ons from $0.25 per monitored point \u002F month","No platform fee — you pay only the per-device monitoring fees below. Includes 25 SMS a month; after that, alerts continue by email. Paid SMS beyond it is switched off by default — switch it on under Settings → Billing to carry on at $0.05 per message.",{"sku":201,"name":202,"tagline":203,"base":204,"cadence":189,"highlighted":168,"badge":206,"ctaLabel":190,"ctaKind":191,"features":207,"footnote":215},"professional","Professional","Everything a serious, multi-site monitoring operation needs.",{"amountCents":205,"currency":179},2900,"Most popular",[208,209,210,211,212,213,214],"Everything in Essential","No device cap — connect as many sensors, boards & gateways as you run","Escalation ladders that can place an automated voice call","HACCP-style logs & scheduled compliance PDF reports","White-label branding across the dashboard and the reports you send","Multi-site fleet map with region roll-ups","2-year reading history, exportable as CSV; 5- and 9-year retention add-ons from $0.25 per monitored point \u002F month","Flat platform fee per account; per-device monitoring fees below still apply. Includes 100 SMS and 20 voice calls a month, then $0.05 per message and $0.25 per call.",{"sku":217,"name":218,"tagline":219,"base":220,"cadence":189,"highlighted":166,"ctaLabel":221,"ctaKind":222,"features":223,"footnote":230},"enterprise","Enterprise","For large fleets and teams with procurement, security & contracting needs.",null,"Talk to sales","sales",[224,225,226,227,228,229],"Everything in Professional","Single sign-on with your OIDC identity provider (Okta, Entra ID, Google Workspace)","DNS-verified domain routing with just-in-time user provisioning","Five-year compliance history included, with deeper windows on request","Net-30 invoicing on approval, instead of card-on-file","Volume hardware & device-fee agreements, with your pricing pinned for the term","Custom pricing scoped to your fleet size and requirements.",[232,241,254,262],{"key":233,"label":234,"description":235,"skus":236,"perDevice":239},"sensor","Wireless sensor","Each Wi-Fi or long-range temperature & humidity sensor reporting to your fleet.",[237,238],"FC-TRH-W","FC-TRH-L",{"amountCents":240,"currency":179},500,{"key":242,"label":243,"description":244,"skus":245,"perDevice":249,"perChannel":251,"includedChannels":253},"io_board","Multi-input monitoring board","Any 4- or 8-input board, on Wi-Fi or long-range, at one class fee — plus a small monthly fee for each active channel beyond the ones the class fee already covers.",[246,247,248],"FC-MI-4","FC-MI-4-L","FC-MI-8",{"amountCents":250,"currency":179},1000,{"amountCents":252,"currency":179},200,4,{"key":255,"label":256,"description":257,"skus":258,"perDevice":260},"gateway_cellular","Cellular gateway","Covers the managed multi-carrier SIM and cellular data — no carrier contract needed.",[259],"FC-GW-C",{"amountCents":261,"currency":179},2000,{"key":263,"label":264,"description":265,"skus":266,"perDevice":268,"note":269},"gateway_ethernet","Ethernet gateway","Backhauls long-range sensors over your own network.",[267],"FC-GW-E",{"amountCents":188,"currency":179},"No monthly fee — a wired gateway rides on the network you already run.",[271,275,279,282,286,290,294],{"sku":237,"name":272,"connectivity":273,"deviceClassKey":233,"storePath":274},"Temperature & Humidity Sensor (Wi-Fi)","Wi-Fi","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-TRH-W",{"sku":238,"name":276,"connectivity":277,"deviceClassKey":233,"storePath":278},"Temperature & Humidity Sensor (Long-Range)","LoRa","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-TRH-L",{"sku":246,"name":280,"connectivity":273,"deviceClassKey":242,"storePath":281},"4-Input Monitoring Board","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-MI-4",{"sku":247,"name":283,"connectivity":284,"deviceClassKey":242,"storePath":285},"4-Input Monitoring Board (Wi-Fi + Long-Range)","Wi-Fi or LoRa","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-MI-4-L",{"sku":248,"name":287,"connectivity":288,"deviceClassKey":242,"storePath":289},"8-Input Monitoring Board","Wired inputs","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-MI-8",{"sku":267,"name":291,"connectivity":292,"deviceClassKey":263,"storePath":293},"Ethernet Gateway","Ethernet","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-GW-E",{"sku":259,"name":295,"connectivity":296,"deviceClassKey":255,"storePath":297},"Cellular Gateway","Cellular","https:\u002F\u002Fapp.freshcontrols.com\u002Fstore\u002FFC-GW-C",{"retention":299,"alerts":300},"Your plan sets how far back you can look: Essential keeps 1 year of readings, and Professional keeps 2 years. Full-resolution readings — every individual sample — go back up to 1 year, or your plan’s whole window when that is shorter; anything older is kept as hourly averages, which is what long-range trends and compliance reports are built from. Deeper history is a paid add-on on any plan: 5- and 9-year windows, from $0.25 per monitored point \u002F month — the same rates the plan cards quote.","SMS alerts work on every plan, and every plan includes a monthly allowance — the plan card states what yours includes. What happens after that depends on your plan. On Essential, paid SMS is switched off to start with, so once the allowance is used up alerts keep going out by email instead of stopping — switch on paid SMS under Settings → Billing if you would rather they carried on at the per-message rate. On Professional, messages past the allowance are billed at the per-message rate the card quotes, from the point your subscription starts. Automated voice calls are included from Professional up, with their own allowance. Email and push alerts are never metered and never stop, whatever your billing state.",{"maxFirstOrderSubtotal":302,"summary":304,"clause":305,"short":306},{"amountCents":303,"currency":179},50000,"Your first order is covered by our 30-day money-back guarantee when its hardware comes to $500 or less — any mix of devices.","send it back within 30 days of delivery and we refund it in full — the 30-day money-back guarantee covers a first order of $500 or less of hardware, any mix of devices.","30-day money-back guarantee on first orders up to $500 of hardware",[],1793363097753]