Indoor air quality monitor SIGN+

for smart buildingsfor officeCO2

Overview
SIGN+ is a connected 7-in-1 room sensor for professional indoor monitoring. It measures temperature, humidity, CO2, VOCs, brightness, presence and noise, and provides direct readings on an E‑Ink display. On-board analysis (iZiAiR) and LoRaWAN connectivity simplify facility management and occupant comfort monitoring.

Main sensors

• Temperature
• Humidity
• Carbon Dioxide (CO2) — NDIR, reading every 5 minutes
• Volatile Organic Compounds (VOCs) — MOx detection
• Brightness (lux)
• Presence (PIR)
• Noise (sound level)

Key features

• E‑Ink display: low power, high readability, configurable remotely or via NFC; direct ambient readings.
• Intelligent on-board analysis (iZiAiR) for multi-pollutant interpretation and prioritisation.
• Multi-band LoRaWAN transceiver (configurable EU868, US915, AS923, etc.).
• Battery operation with replaceable lithium cells (3 slots) and USB‑C continuous power option.
• Built-in microSD for local storage (up to 10 years of measurements).
• Visible LED indicator (Green/Orange/Red) and configurable audible alert; thresholds adjustable via NFC or remotely.
• 270° air intake and multiple side openings for improved ambient sampling.
• Anti-theft: lockable mounting base and removal detection alert.
• Easy NFC configuration (Nexelec TOUCH app) and front button for quick measurement sharing.
• Data-loss mitigation: Historical Data mode and grouped datalog with transmission redundancy.
• End-to-end security: double AES128 encryption for transmitted data.

Use & benefits
Monitors indoor air quality to support ventilation strategies, occupant health and building efficiency. Useful for CO2-driven ventilation, VOC detection in humid/dusty sites, lighting and energy optimisation, acoustic monitoring, space management and automation scenarios.

Installation & management

• Quick installation using supplied mounting base, 3M adhesive or screws and plugs.
• NFC configuration without powering the device (25+ configurable parameters: transmission frequency, indicators, radio band, measurement intervals).
• Wall-mount or free-standing use; lockable base for secure installations.

Technical specifications

• Model: SIGN+
• Dimensions: 130 x 87 x 30 mm
• Power: 3 removable lithium batteries (SAFT LS14500 included) + USB‑C input; kit includes 3 batteries, microSD card, USB‑C cable, mounting base, screws & plugs, 3M® adhesive mount.
• Autonomy: depends on configuration (scenarios referenced on product page, up to 20 years* in extreme low-use scenario; typical multi-year operation depending on settings).
• Connectivity: LoRaWAN multi-band transceiver; periodic and on-change transmission; grouped datalog + redundancy.
• Storage: microSD integrated (up to 10 years of measurements).
• Operating conditions: indoor use; typical operating range 0°C to +50°C (validated −20°C to +50°C in other statements); humidity 0–99% RH non-condensing.
• Indicators: LED visible >10 m; audible alert configurable.
• CO2 sensor: resolution 1 ppm; accuracy ±(50 ppm + 3% of value); range 0–5,000 ppm; weekly auto-recalibration (manual possible).
• VOC: resolution 1 μg/m³; accuracy ~25%; range 0–15,000 μg/m³ (MOx).
• Temperature: resolution 0.1°C; accuracy ±0.2°C; range −30°C to +70°C.
• Humidity: resolution 0.5% RH; accuracy ±2% RH; range 0–100% RH.
• Brightness: resolution 5 lux; accuracy ±5 lux; range 0–5,000 lux.
• Noise: resolution 1 dB; accuracy ±5 dB; range 35–120 dB.
• Presence (PIR): angle 92°; detection up to 6 m.
• Warranty: 2 years. Certifications: CE, UKCA, FCC.