Temperature Sensor
A discrete, wireless oracle for your grow room. Deploy anywhere. Deploy as many as you need. Know everything that matters.
Swiss-made Sensirion sensors for temperature and humidity. Integrated light sensor reports lux levels — so you can tell if your lights are on without being there.
Encrypted SMS and telephone voice alerts when parameters exceed your thresholds.
Pay by card, Apple Pay or Google Pay. Free shipping. Prices in AUD.
Deploy Anywhere. Scale Infinitely.
One sensor gives you a reading. Multiple sensors give you a map. Temperature stratifies. Humidity varies by location. Microclimates exist whether you're aware of them or not.
These sensors are designed to be scattered throughout your space. Under the canopy. Above the lights. Near the intake. Near the exhaust. Each one reports independently, giving you a complete picture of your environment — not just a single point measurement.
No hub required. No pairing limits. Each sensor connects directly to your WiFi and reports to the dashboard — or connects to our optional gateway if your WiFi coverage is limited. The gateway aggregates signals from all nearby devices and relays them over a single connection, ideal for remote buildings, shielded rooms, or setups with unreliable routers. Add more sensors any time.
Common Deployment Patterns
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Canopy level
Where your plants actually live — the reading that matters most
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Root zone
Temperature at the medium affects uptake — don't assume it matches air temp
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Near HVAC intake/exhaust
Verify your climate control is actually doing what you think it's doing
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Hot spots
Corners, dead zones, areas with poor airflow — find problems before your plants do
Sensor Specifications
Sensirion Swiss sensor — typical accuracy ±0.2°C, range -40°C to +125°C
Sensirion Swiss sensor — typical accuracy ±2% RH, full 0-100% range
Logged alongside everything else — useful for spotting weather fronts moving through, which change how a room behaves before the temperature does
High-dynamic-range light sensor — utility readings, not PAR measurement
Swiss Precision
We use Sensirion sensors — designed and manufactured in Switzerland. Sensirion is the industry standard for precision environmental sensing, trusted in medical devices, cleanrooms, and scientific instruments worldwide.
Cheap sensors drift. They're affected by self-heating. They give you readings that look plausible but aren't accurate. When you're making decisions about your grow based on environmental data, the quality of that data matters.
These sensors report temperature, humidity, and barometric pressure with accuracy you can actually rely on.
The Light Sensor
Not a PAR meter, and not trying to be. Lux is weighted to the sensitivity of the human eye, which peaks in green and under-reads the red and blue your plants use most — so two fixtures with identical PPFD can give completely different lux readings. It's the wrong tool for measuring what reaches your canopy. It's the right tool for two jobs that matter.
For actual canopy-level photosynthetic measurement, a dedicated PPFD sensor is in development and will report into the same dashboard.
Dark Cycle Integrity
Light pollution during dark periods can cause stress, hermaphroditism, and reduced yields in photoperiod-sensitive plants. Even small amounts of light — a green indicator LED, light leaking under a door — can disrupt the flowering response. The lux sensor gives you proof that your dark cycle is actually dark.
System-Wide Dark Mode
The light sensor data is shared across your entire OMGROW system. When the room goes dark, every device stops illuminating its indicator LEDs — no configuration needed. Equipment that glows through a dark cycle is part of the problem, so ours doesn't.
Hardware & Connectivity
The Device
- • Compact, discrete enclosure — designed to disappear into your environment
- • WiFi connectivity — connects directly to your network, no hub or bridge required
- • Standard 5V USB power — any phone charger works as a replacement
- • Over-the-air firmware updates — new features and improvements pushed automatically
Access From Anywhere
- • TLS-encrypted connection to our servers — monitor from any phone, tablet, or computer, anywhere in the world
- • SMS and phone call alerts — set thresholds for temperature, humidity, or light level and get notified immediately if they're breached
- • Historical graphs included — 48 hours of real-time data and 7 days of aggregated data, free, no subscription
- • Web app works on any browser. Native Android and iOS apps available.
- • No subscriptions. No monthly fees. One purchase, lifetime access.
Printed in PLA. Built to Be Repaired.
The housing is 3D printed in PLA, a bioplastic made from plant starch. It's mostly polylactic acid, with a small fraction of polymer impact modifiers blended in so it prints cleanly and stands up to years in a warm, humid room. Those modifiers are polymers, not the free-floating phthalate plasticisers that make up to 40 percent of flexible PVC, and there are no bisphenols because PLA isn't a polycarbonate.
Every device carries a five-year warranty, and every part in it is user-replaceable. We sell the circuit boards, the printed cases and the individual parts, so if something does fail outside the warranty you fix it cheaply instead of replacing the device. We'd like you to still be running this in ten years.
Why we build from bioplasticReady to see your grow room clearly?
$100, 2 week lead time. Shipping worldwide.