NM-103

NM-103 is a LoRaWAN indoor air quality sensor that measures temperature, humidity and CO₂ concentration (NDIR, 400…5000 ppm) in one housing. A BMS platform uses its data to control ventilation by CO₂ level. The 2.13″ E-ink screen shows the CO₂ trend and a comfort emoticon, while a traffic-light indicator and an alarm report warn when the CO₂ threshold is exceeded. A 640-record archive is resent after a connection loss. Two Li-SOCl₂ batteries last about 3–4.5 years at a 10-minute reporting interval (EU868, laboratory estimate); configuration is by NFC from a smartphone and by downlink commands. The sensor is used in offices, shops, classrooms and hospitals.

Features

Temperature, humidity and CO₂ (NDIR) in one housing;
2.13″ E-ink screen: CO₂ trend and comfort emoticon;
Traffic-light indicator and alarm report when the CO₂ threshold is exceeded;
640-record archive, resent after a connection loss;
Li-SOCl₂ batteries: ≈ 3–4.5 years (EU868, 10 min interval);
Configuration by NFC from a smartphone and by downlink commands;
Applications: offices, shops, classrooms, hospitals; CO₂-based ventilation control through a BMS platform.

Specifications

LoRaWAN regional plans: EU868 · IN865

General

Screen (except version L)	E-ink 2.13″, black and white
CO₂ level indicator	traffic light, 1 LED
Button (under the back cover)	power / reset
Configuration	NFC, downlink
Operating temperature: sensor · screen, °C	−20 … +60 · 0 … +40
Humidity, non-condensing, %	0 … 95
Housing, ingress protection	PC + ABS, white, IP30
Dimensions, mm	68 × 65 × 20.5
Weight with batteries, g	182.5
Mounting	wall mounting: screws or tape

Power

Batteries	2 × ER14505, 2700 mAh
Battery life with screen, SF7 / SF10, years	≈ 4.5 / 3
Battery life without screen (L), SF7 / SF10, years	≈ 5 / 3.3
Battery life estimate conditions	10 min reporting, +25 °C, EU868, laboratory estimate

Measurement

Temperature: range · resolution, °C	−20 … +60 · 0.1
Temperature accuracy (typ.), °C	±0.2 (0…+60 °C) / ±0.3 (−20…0 °C)
Humidity: range · resolution, % RH	0 … 100 · 0.5
Humidity accuracy (typ., +25 °C), % RH	±2
CO₂ (NDIR): range · resolution, ppm	400 … 5000 · 1
CO₂ accuracy (0…+50 °C)	±30 ppm ±3 % of reading
CO₂ calibration	manual, background (ABC)
Altitude compensation, m	0 … 5000

LoRaWAN

Specification version	1.0.2 / 1.0.3
Class, activation	Class A, OTAA / ABP
Tx power (868 MHz), dBm	16
Sensitivity at 300 bit/s, dBm	−137
Antenna	internal
Reporting interval, min	1 … 1080 (default 10)

Supply

Package contents	sensor with batteries installed, 2 screws with wall plugs, locking screw, double-sided mounting tape, quick guide, warranty card

Documentation

Datasheets

Datasheet PDF

Versions

Part number	Version
NM-103/[F]	With a 2.13″ E-ink screen.
NM-103L/[F]	Without a screen.