Radon, in real time. Becquerels on the wall.
A continuous, plug-in radon monitor — not a 90-day cassette and a posted lab report. Watch the air in your home or workplace move past 100 Bq/m³, past 200, before it builds. WHO and UKHSA-aligned thresholds. Calibrated at our bench, like everything we make.
Order today and we'll dispatch as soon as your unit is calibrated. Free UK & EU shipping. Or join the early list and we'll email you when the next batch is ready.
Included for the life of the device — no monthly fee for personal households. Organisations pay Envora Fleet per managed device, from £3/device/mo (£15/mo minimum).
WHO 200
UK action 1,000 2,000
Illustrative dashboard view — final UI may differ.
An average tells you a number. A curve tells you the cause.
Passive testing sends one figure averaged over a season. Envora Radon shows the spike at 3 AM in a closed bedroom, the drop the moment you crack a window, the slow climb in unused rooms — minute by minute, room by room.
- One season-long average
- Mailed to a lab, posted back as a PDF
- No room-by-room comparison
- No alert when levels move
- Replace and re-send each season
- Continuous reading — minute by minute
- 15-minute and 24-hour rolling averages
- Per-room timelines — see ventilation work
- Push alerts past WHO and UKHSA thresholds
- Plug it in once. It just keeps measuring.
Single purpose. Built for it.
A different platform from Envora One — purpose-built around radon detection, sized for a sealed measurement chamber, and tuned to the long, quiet decay statistics this gas asks for.
- Method
- Pulse-ionisation alpha detection
- Range
- 0–2,000 Bq/m³
- Resolution
- 1 Bq/m³
- Update
- Continuous · 15-min and 24-h rolling averages
- Calibration
- Bench-calibrated against reference radon chamber
- Drift
- Self-corrected against long-term reference
- Dimensions
- 120 × 120 × 40 mm — about 30% larger than Envora One
- Weight
- 290 g
- Materials
- Anodised aluminium · recycled PC base
- Finish
- Graphite · Mist
- Indicator
- Status LED ring · WHO / UKHSA threshold colour
- Mount
- Desk · wall plate (optional accessory)
- MCU
- Espressif ESP32
- Wi-Fi
- 2.4 GHz · 802.11 b/g/n
- Protocols
- HTTP / REST · MQTT · mDNS
- Dashboard
- Same Envora dashboard as Envora One
- Firmware
- OTA updates · signed
- Security
- TLS 1.3 · X.509 device certificates
- Input
- USB-C · 5 V
- Current
- 300–700 mA typical
- Cable
- 1.5 m braided · included
- Operating
- 0–40 °C · 0–95 %RH non-condensing
- Acoustic
- Internal fan · barely perceptible
- Bedroom-safe
- Passive measurement · zero emissions
Eleven channels. One score.
A comprehensive indoor-air monitor. Particles, gases, climate, light, sound — fused into a single drift-compensated IAQ reading. Available now to reserve.
One channel. One job.
A purpose-built radon instrument. Different physics, different chassis, same Envora platform — same dashboard, same API, same calibration discipline. Coming soon.
Three steps. No commitment.
Joining the early list is non-binding. We hold a place in your name and confirm everything by email before any charge — including the price, which we will lock with the early list before pre-orders open.
You join the early list
Drop your details. Tell us where it will live so we can plan calibration runs that match the rooms our first units will see.
We confirm price + ship date
When calibration tooling and certification are locked in, we email you with the price, dispatch window and a pre-order link. Walk away free at any point.
It ships — calibrated
Free across the UK and EU, with the calibration certificate in the box. The dashboard you may already use for Envora One is ready when the device arrives.
Quick answers. No small print.
When does Envora Radon ship?
We are finalising calibration tooling. Join the early list and we will confirm dispatch dates the moment they are locked in. No deposit, no commitment.
How is it different from a 90-day cassette test?
A passive cassette gives you one number averaged over a season. Envora Radon shows you the curve — the morning spike from a closed bedroom, the drop when you ventilate, the slow climb in unused rooms. You see the cause, not just the average.
Where should I put it?
Closest to where you spend the most time, especially bedrooms and ground-floor rooms. We recommend at least one unit per floor in radon-prone areas — Cornwall, Devon, parts of Aberdeenshire and Northamptonshire are higher-probability zones in the UK.
Is it safe to keep in a bedroom?
Yes. Envora Radon only measures — it is a passive instrument with no emissions of its own. The internal fan is barely audible.
What is the price?
Envora Radon is £229 — a one-time hardware price. UK and EU shipping is free. Home monitoring is included for the life of the device for personal households. Organisations pay Envora Fleet per managed device — Fleet Starter £3/device/mo (£15/mo minimum), Team £5/device/mo (£49/mo minimum), Estate £7/device/mo (£149/mo minimum), Enterprise custom.
Can I run it alongside Envora One?
Yes. Both publish to the same Envora dashboard, MQTT topic and REST API. One reading per device, one timeline per room.
Will there be a fleet / landlord plan?
Yes. Volume pricing, staged dispatch and a single account manager — same shape as Envora One fleet. Tell us roughly how many units in the early list note field.
Get on the Envora Radon early list.
We confirm price and dispatch with the early list before pre-orders open. No deposit, no spam. Reply within one UK business day.