Overview
A CO₂ reading every fifteen minutes misses most of what happens in a meeting room. Square CO2 follows the room: every five minutes in the dark, every two with the lights on, and every minute once CO₂ passes your limit, say 650 ppm. Crossing the limit is reported at once; otherwise a report goes out only when the value has moved. Ventilation, whether run by rules or AI optimisation, hears within minutes rather than quarter-hours.
The same logic protects the battery. In normal operation the sensor draws around 10 µA, so its 4,000 mAh battery lasts the life of the product, more than ten years. The battery stops being a maintenance item: no battery rounds, less waste. Each report carries the CO₂ values you choose (minimum, maximum, mean or current), so the peaks can show as well as the trend. It reports temperature, humidity, pressure and light as well.
Specifications
- Sensors
- CO₂, temperature, humidity, pressure, light
- CO₂ accuracy
- ±(100 ppm + 10 %), 400–5,000 ppm
- Measuring
- Default dark 5 min · lit 2 min · high CO₂ 1 min, configurable within limits
- Reporting
- Every 15 min if changed beyond the set step; every 2 min at high CO₂ · configurable within limits
- Report contents
- Your choice of CO₂ (min, max, mean, current), temperature, humidity, pressure and light
- Threshold alarm
- Report at once; discreet red LED if set
- Protocol
- LoRaWAN 1.0.4, Class A, OTAA
- Frequency
- EU868 · US915 · AU915 · AS923-1 · AS923-2 · KR920 · IN865
- Configuration
- NFC (Android) and over the air; alternative VSM apps through the Hugin app or over LoRaWAN
- Memory
- Built-in data memory
- Positioning
- 2.4 GHz Wi-Fi geopositioning via cloud service
- Battery
- LiMnO₂, 4,000 mAh, the product’s lifetime: 10+ years
- IP rating
- IP30, indoor
- Operating temp
- –20 to +60 °C
- Dimensions
- 58 × 58 × 15 mm
- Weight
- 65 g
- Mounting
- Adhesive, or optional screw mounting kit
Key features
- ✓Better air, less energy: Ventilation hears within minutes instead of at the next quarter-hour: air when people arrive, savings when they leave.
- ✓A battery for the product’s life: More than ten years: the battery lasts as long as the product. No battery rounds, lower lifetime cost, less waste.
- ✓Sees the peaks: Choose min, max, mean or current CO₂ per report, so the stuffy half-hour shows up as well as the average.
- ✓Measured, for rules with numbers: A calibrated CO₂ sensor for schools, offices and public buildings where CO₂ is regulated.
Zubehör
- Square screw mounting kit: Zwei Klebeplatten, um jeden Square-Sensor dort zu verschrauben, wo Klebeband nicht ausreicht — hinter dem Gerät oder daneben. Details