Monitoring & Controlling Drying Kilns with iNut: Temperature & Humidity per Batch, Auto-Tracking the Drying Curve
Turn a manual drying kiln into a smart one with iNut: real-time multi-point temperature and humidity readings, automatic control of heating – fans – valves that follow each batch's drying curve, instant Email/Telegram alerts on any deviation, and real-time monitoring on a SCADA dashboard & app. Consistent batches, fewer scorched losses, lower fuel consumption.
Drying is an all-or-nothing stage. With the very same batch of material, just a few degrees too hot or moisture pulled out too fast and the product cracks, warps, discolors, or loses its essential oils — or, the other way round, under-drying leaves it moldy and wasted. Manual operation means workers watching the clock, logging numbers by hand, adjusting valves manually, and only knowing the kiln's real state by standing right next to it. Overnight shifts, shift changes, power outages — everything ends up riding on memory and luck.
A smart drying kiln doesn't require replacing the whole line. It simply adds one extra layer of measurement – logic – control: sensors stand in for a watchful eye, iNut compares readings against the reference drying curve and automatically toggles the heating relay, fan and air valve, and lets you see the whole picture on your phone — wherever you are.
Measuring temperature & humidity — the kiln's "senses"
A drying chamber is never perfectly even in temperature: hotter near the heat source, cooler in far corners, different between upper and lower shelves. iNut places multiple temperature sensing points throughout the chamber, along with air humidity (RH), and when needed material moisture too — all fed back to one place in real time. Only with multi-point data can you see the temperature gaps and moisture-trap spots, and adjust airflow so the whole batch dries evenly.
Wireless connectivity & aggregation at the iNut PC edge
Drying kilns usually sit in hot, dusty workshops, or are spread across several chambers far apart — running signal cabling is both costly and noise-prone. iNut RS485 / WiFi Mesh brings data back wirelessly, with nodes relaying to one another to cover the whole drying area, and outdoor units can even run on solar power. Everything flows into iNut PC at the edge layer: aggregating data, running control logic on-site, storing history, and uplinking over 4G to the cloud even when the LAN connection has issues.
Auto-tracking the drying curve — batch-based control
Each type of material has its own drying curve: a heating-up stage, a fast moisture-removal stage, then a stable cool-down. You load the batch recipe into iNut once; the system continuously compares measured temperature and humidity against time-stamped setpoints and automatically switches the heating relay on/off, adjusts the fan and air valve to track the curve. No more "riding the throttle" — the kiln runs the exact script from start to finish of the batch, even on the night shift.
Instant alerts via Email & Telegram
Drying failures usually creep in silently: a stuck fan, a worn-out heating element, a leaky door, a temperature spike. iNut PC watches continuously, and whenever a reading exceeds the safety threshold or strays from the curve for too long, it pushes an alert instantly via Email/Telegram — noting which chamber, which parameter, and at what time. The operator on duty finds out before the batch is ruined, instead of discovering it when the kiln is opened. At dangerous thresholds, the system can automatically cut off heating for safety.
Real-time monitoring on SCADA dashboard & app
The whole drying operation shows up on one screen: real-time temperature and humidity per chamber, the drying curve currently running, fan/heating/valve status, and history for quality traceability. iNut Platform (self-hosted cloud) builds an intuitive SCADA/HMI dashboard, while the iNut app lets you view and adjust thresholds remotely. Need to integrate with an existing control system? iNut OPC speaks OPC UA / Modbus / XML-DA, and iNut Datalogger stores data for the long term.
Built to last in a drying environment — install once, run reliably
The drying area is hot, humid, dusty and vibrating — a place where equipment tends to die young. iNut sensors and nodes are chosen to industrial standards, transmit wirelessly to avoid damaged signal cabling, and outdoor units can run on solar power. Combine iNut Muro to control the microclimate of curing/aging chambers and LoRa for far-away measurement points, and you get a monitoring–control system that covers the whole workshop while staying lightweight to install and low-maintenance.
// Quick specs
Multi-point temperature · RH · material moisture
Heating · fan · valve following the curve
iNut PC · logic · log · 4G uplink
Email · Telegram · automatic safety cut-off
RS485 · WiFi Mesh · LoRa · OPC UA
SCADA dashboard · remote iNut app
What does a smart drying kiln deliver?
Following the drying curve precisely keeps color, final moisture, and quality stable batch after batch.
Early detection of temperature and humidity drift, plus automatic cut-off when it turns dangerous, reduces whole-batch losses.
Heating and fans run only when and as much as needed — no fuel burned in excess, no over-drying.
The kiln runs its own script, alerts remotely, and keeps a traceable history — peace of mind even on the night shift.
The kiln is still the same — only the way we control it has changed
Temperature, humidity and airflow inside the drying chamber still follow the same old laws; what's new is that we see them through data and let the system track the curve instead of relying on guesswork. A smart drying kiln, in the end, is simply the experience of a skilled kiln master turned into a repeatable script — every batch coming out as right as the very first one done well.
What is each drying batch of yours "telling" you about temperature and humidity — that we haven't yet stopped to listen to?