S+S Room air quality sensor / room CO2 and air quality sensor - RLQ-CO2-Modbus LCD

Essential Features

The S+S Room air quality sensor RLQ-CO2-Modbus LCD offers extensive capabilities for monitoring and controlling indoor air quality. Designed by S+S Regeltechnik GmbH, this multifunctional room climatic sensor is equipped with Modbus connectivity and is housed in an aesthetically pleasing plastic casing with a snap-on cover. The sensor, available with or without a display, is a high-end solution for efficiently managing room environments in various settings.

Key Functions

The sensor accurately measures parameters such as humidity (0-100% RH), temperature (0-50°C), air quality (VOC) (0–100%), particulate matter (PM) (0-1000 µg/m3), and CO2 levels (0-5000 ppm). It also serves as a room controller, facilitating energy-efficient and demand-based ventilation to reduce operational costs and enhance comfort. The sensor is versatile and suitable for use in offices, hotels, conference rooms, residences, and commercial establishments.

Advanced Technology

The sensor features a digital humidity and temperature sensor for precise measurements and a VOC sensor for assessing air quality based on volatile organic compounds. The CO2 concentration in the air is determined using an optical NDIR sensor. Additionally, an optical particle sensor accurately detects particles in the 0.3 to 10-micrometer range.

Modbus Interface

The innovative Modbus sensor is equipped with a galvanically isolated RS485 Modbus interface, allowing for seamless communication. It includes features such as a selectable bus termination resistor, DIP switches for configuring bus parameters and address settings, internal LEDs for status indication, and two separate push-in terminals. The sensor comes factory-calibrated and can be fine-tuned by professionals as needed.

Technical Specifications

- Power Supply: 24 V AC/ DC (± 10%) - CO2 Sensor: Optical NDIR sensor with automatic and manual calibration - VOC Sensor: VOC sensor (Metal oxide) with automatic calibration - Bus Protocol: Modbus (RTU Mode), adjustable address range from 0 to 247 - CO2 Range: 0-5000 ppm - VOC Range: 0-100% air quality - Housing: Plastic, ABS material, Pure white color (similar to RAL 9010) - Dimensions: 98 x 98 x 33 mm (Baldur 2) - Display: Backlit display, two lines, indicating current humidity, temperature, air quality, and/or CO2 levels - Installation: Wall-mountable or compatible with UP boxes, Ø 55 mm, 4-hole base for vertical or horizontal mounting - Protection Rating: IP 30 (according to EN 60 529) For further technical details, please refer to the official product documentation provided by the manufacturer.