Temperature sensors · SEN-AIN
Sematics Node+ Embedded
A compact LoRaWAN sensor with a high-accuracy internal temperature sensor and no external inputs, so the enclosure stays fully sealed. Accurate to ±0.1 °C and designed to meet EN 12830:2018, accuracy class 0.2.
- LoRaWAN
- Temperature
- Measurement range
- −40 °C to +85 °C (internal sensor)
- Accuracy
- ±0.1 °C (±0.09 °C from 20 to 42 °C, typical); resolution 0.008 °C
- Logging interval
- 5 minutes default, set on the platform
Key specifications
Node+ Embedded at a glance
Copied from the Node+ Embedded datasheet (SEN-AIN). The full tables are further down.
| Measurement range | −40 °C to +85 °C (internal sensor) |
|---|---|
| Accuracy | ±0.1 °C (±0.09 °C from 20 to 42 °C, typical); resolution 0.008 °C |
| Logging interval | 5 minutes default, set on the platform |
| Battery life | Up to 4 years at 5-minute logging; 8+ years at 10 to 15 minutes |
| Connectivity | LoRaWAN Class A, 868 MHz; ~1 km in buildings, up to 20 km line of sight |
| IP rating | IP67 (submersible to 1 m for 30 minutes) |
| Dimensions | 99 × 56 × 32 mm (without bracket) |
| Certifications | CE, UKCA, RoHS 3, FCC Part 15; designed to meet EN 12830:2018, accuracy class 0.2 |
Datasheet
Full specifications
Every table from the datasheet, as published.
Internal temperature sensor
| Sensor type | Digital (AMS AS6221) |
|---|---|
| Measurement range | −40 °C to +85 °C |
| Accuracy | ±0.1 °C; ±0.09 °C from 20 to 42 °C (typical) |
| Resolution | 0.008 °C |
| Calibration | Factory calibrated (NIST-traceable) |
Temperature accuracy by range
| 20 °C to 42 °C | ±0.09 °C |
|---|---|
| −25 °C to +55 °C | ±0.10 °C |
| −40 °C to +70 °C | ±0.12 °C |
| 70 °C to 85 °C | ±0.15 °C |
Accuracy based on sensor specification. Performance depends on temperature range and calibration method. See the certificate for uncertainty values.
Wireless
| Protocol | LoRaWAN Class A |
|---|---|
| Frequency band | 868 MHz (EU) |
| Typical range | ~1 km (in built environments) |
| Maximum range | Up to 20 km (line of sight, elevated antenna conditions) |
| Antenna | Integrated PCB antenna (Velox SR42I052), −0.4 dBi typical, omnidirectional (approximate) |
| Module certification | Pre-certified LoRa radio module (RED and FCC Part 15 compliant) |
| Network compatibility | Private LoRaWAN networks; Sematics platform |
Power and battery
| Battery type | 2 × AA lithium cells (replaceable) |
|---|---|
| Battery capacity | ~1500 mAh (typical) |
| Nominal voltage | 1.8 V per cell (3.6 V combined nominal) |
| Battery life | Up to 4 years at 5-minute logging (typical); up to 8+ years with 10 to 15 minute logging intervals |
| Battery replacement | Field-replaceable via sealed compartment (tool access required) |
Mechanical and environmental
| Enclosure material | ABS, white |
|---|---|
| Ingress protection | IP67 (dust-tight and submersible to 1 m for 30 minutes) |
| Dimensions | 99 × 56 × 32 mm (H × W × D), without mounting bracket |
| Mounting | Adhesive pad, cable ties or screw mount; ABS bracket with slotted holes included |
| Operating temperature | −40 °C to +85 °C |
| Operating humidity | 0 to 95% RH (non-condensing) |
Logging and software
| Logging interval | Set on the platform (default 5 minutes) |
|---|---|
| Backup memory | Stores up to 100 days of data if the network goes down |
| Backfill | Missed readings are resent automatically after reconnection |
| Firmware | Over-the-air updates |
| Gateway capacity | Up to 2,000 sensors per gateway |
Compliance
| CE marking | Radio Equipment Directive (RED 2014/53/EU) |
|---|---|
| UKCA marking | UK Radio Equipment Regulations |
| RoHS 3 | Restriction of Hazardous Substances (2011/65/EU) |
| EN 12830:2018 | Designed to meet Accuracy Class 0.2, temperature data loggers |
| ETSI EN 300 220 | Radio performance (868 MHz) |
| ETSI EN 301 489-1 / EN 301 489-3 | EMC for radio equipment |
| EN 62368-1 | Electrical safety for communication equipment |
| FCC Part 15 Subpart C | US radio compliance (pre-certified module) |
| WEEE | Waste Electrical and Electronic Equipment |
| NIST traceability | Factory calibration traceable to NIST standards |
Compatible
Compatible gateways
Any Link+ gateway carries Node+ readings to Sematics. Which one depends on the building, not the sensor.
Works with Sematics
Readings become alarms, records and reports
Every reading goes to Sematics, where alarms reach a person, the audit trail is kept, and reports are ready when the inspector asks.
Next step
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