Loopshore Sensors
Technical Reference
Overview
This document lists all sensors used in Loopshore devices across Gen 1 and Gen 2 hardware revisions, with the operating range each manufacturer states in its datasheet.
The device keeps running outside a sensor’s operating range, but that sensor’s readings are not reliable there. This matters most in cold spaces and for outdoor installations (outdoors, the device must be protected from rain and snow while letting outside air flow freely around it). Loop One and the other devices operate from −20 °C to +40 °C, but below 0 °C the CO2 sensor does not measure, and VOC and particulate matter measurement are limited. See the Outdoor installation section of each product’s user manual.
Sensors Common to Both Generations
| Sensor | Measurement | Operating range (manufacturer) | Notes | Datasheet |
|---|---|---|---|---|
| Senseair Sunrise | CO2 concentration (NDIR) | 0 … +50 °C, 0–85 %RH non-condensing | Does not operate below 0 °C. Standard accuracy at +15 … +35 °C. | Product specification |
| Sensirion SPS30 | Particulate matter (PM1.0, PM2.5, PM4.0, PM10) | −10 … +60 °C, 0–95 %RH | Best performance at +10 … +40 °C and 20–80 %RH. | Datasheet |
| Silicon Labs Si1151 | Ambient light (lux) | −40 … +85 °C | Datasheet | |
| ST LIS3DH | Acceleration (X/Y/Z), motion detection | −40 … +85 °C | Datasheet | |
| TDK ICS-43434 | Sound pressure level (dB) | −40 … +85 °C | Datasheet | |
| Nordic nRF9160 (GNSS) | GPS position, altitude, speed, heading | −40 … +85 °C | Product specification |
Gen 1 Sensors
Sensors used exclusively in Gen 1 devices. These were replaced in Gen 2.
| Sensor | Measurement | Operating range (manufacturer) | Notes | Datasheet |
|---|---|---|---|---|
| Bosch BMP280 | Barometric pressure, temperature | −40 … +85 °C | Full accuracy at 0 … +65 °C. | Datasheet |
| TI HDC2080 | Temperature, relative humidity | Temperature −40 … +125 °C, humidity −20 … +70 °C, non-condensing | Prolonged operation above 80 %RH can shift the reading. | Datasheet |
| Sensirion SGPC3 | Total VOC (tVOC) | +5 … +55 °C and 4–30 g/m³ absolute humidity, non-condensing | Does not operate in sub-zero air. | Datasheet |
Gen 2 Sensors
Sensors introduced in Gen 2, either as replacements for Gen 1 parts or as new additions.
Replacements:
| Sensor | Replaces | Measurement | Operating range (manufacturer) | Notes | Datasheet |
|---|---|---|---|---|---|
| Bosch BMP581 | BMP280 | Barometric pressure, temperature | −40 … +85 °C | Datasheet | |
| Sensirion SHT45 (SHT4x) | HDC2080 | Temperature, relative humidity | −40 … +125 °C, 0–100 %RH | Humidity most accurate at +5 … +60 °C and 20–80 %RH. Rated for condensing conditions. | Datasheet |
| Renesas ZMOD4410 | SGPC3 | Total VOC, indoor air quality (IAQ) | −40 … +65 °C (algorithm), 0–90 %RH non-condensing | Best accuracy at 0 … +40 °C. Sensitive to low absolute humidity. | Datasheet |
| Sensirion SGP41 (alternative) | SGPC3 | VOC Index (1–500), NOx | −10 … +50 °C, 0–90 %RH non-condensing | Humidity compensation optimised for dew points −13 … +31 °C. | Datasheet |
New additions:
| Sensor | Measurement | Operating range (manufacturer) | Notes | Datasheet |
|---|---|---|---|---|
| Sensirion SDP8xx | Differential pressure (Pa) | −40 … +85 °C, non-condensing | Temperature compensation −20 … +85 °C. | Datasheet |
| TI ADS122C04 | External temperature via PT100 RTD (24-bit ADC) | −40 … +125 °C | The probe’s own range depends on the probe type. | Datasheet |
| Analog Devices DS18B20 | Temperature (1-Wire) | −55 … +125 °C | ±0.5 °C at −10 … +85 °C. | Datasheet |
| Analog Devices MAX31888 | Temperature, high precision (1-Wire) | −40 … +125 °C | ±0.25 °C at −20 … +105 °C. | Datasheet |
Battery
| Component | Operating range (manufacturer) | Notes |
|---|---|---|
| Li-Ion cell, 3.63 V / 4900 mAh | Discharge −20 … +60 °C, charge 0 … +45 °C | At −10 °C the cell delivers about 70 % of its nominal capacity. The device does not charge the battery below 0 °C. |
Notes
- The SGP41 and ZMOD4410 are alternative VOC sensors in Gen 2. The ZMOD4410 provides absolute tVOC measurement in ppb, while the SGP41 provides a relative VOC Index (1–500) using a 24-hour moving average baseline. The SGP41 draws a constant 3mA when enabled. VOC Index is disabled by default — contact us for more information.
- Only the SHT45 temperature and humidity sensor is rated for condensing conditions. Condensation inside the device can distort other measurements and damage the device.
- Operating ranges are quoted from the manufacturers’ datasheets, not measured by Loopshore.
Loopshore Oy — loopshore.com