Merlin RS Series CO2, Temperature & Humidity Sensor

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Description

The RSCO2 Range: Featuring Carbon Dioxide Sensors, Temperature Sensors & Humidity Sensors, designed to monitor and measure vital indoor air quality environmental parameters with precision and reliability. Engineered to be used across residential, public, commercial, and light industrial settings, these sensors offer digital RS485 Bacnet MS/TP, Modbus RTU & analog outputs. Various thermistor outputs available.

  • Available as CO2 only (carbon dioxide sensor only), CO2 & temperature or CO2, temperature & humidity.
  • Versatile Outputs: Delivering 3x 0-10V analog signals for CO2 (PPM), Temperature (°C or °F), and Humidity (% Relative), alongside digital RS-485 communication supporting Modbus RTU or BACnet MS/TP protocols.
  • Reliable Operation: Equipped with a VFC Relay for CO2 and a thermistor output for third-party temperature monitoring, ensuring seamless integration and dependable functionality.
  • Robust Construction: Designed for straightforward wall mounting with a 1/2” DIA rear entry and snap-offs for side trunking, encased in a durable ABS UL Flame retardant housing, assuring longevity and safety in diverse environments.
  • Flexible Power Options: Compatible with 12-24V AC/DC or 230VAC electrical systems.
  • Optimal Performance: Exhibiting rapid response times, quick warm-up periods, and excellent long-term stability, with minimal interference, guaranteeing accurate readings and consistent operation over time.
  • Covered by S&S Northern’s 3 Year Warranty
TECHNICAL SPECIFICATION
MECHANICAL ELECTRICAL
Mounting Wall Mounted 24V AC/DC Power Rating 12-24VDC (11-32VDC) / 24VAC (20-27VAC) 50-60Hz
Entry 1” / 25.4mm DIA Rear Entry 230VAC Power Rating Nominal 230VAC (90-250V AC), 50-60Hz
Size (W x H x D) 86 x 114 x 35mm (Low Profile RS – 86 x 114 x 25mm) Internal Fuse Resettable PPTC 240VAC, 400mA
Weight (Max) 0.164Kg max Communication 127 units max
Enclosure ABS UL Flame Retardant – IP40 Power Consumption Max 2.5W
ENVIRONMENTAL I/Os
Operating Temperature -10 to 50°C Analog Outputs 3x Linear 0-10V/2-10V CO2, Temperature & Humidity, Thermistor (10K3)
Storage 10-30°C / 0 to 95% RH Digital Networks BACnet MS/TP / MODBUS RTU (Parity: None, Data bit: 8bit, Stop bit: 1)
Humidity 0 to 95% RH (continuous) non-condensing Relay Outputs 1x SPST 70mA, 30V
Atmospheric Pressure 80 to 110Pa Thermistor 10K3A1B (Alternative thermistors available)
Altitude <2000m
Installation Cat (230V Voltage) II (Class 2) Pollution Degree 2
Installation Cat (24V Voltage) III (Class 3) Pollution Degree 2
CABLE SPEC USER INTERFACE
Power 1.0 – 2.5mm² max Language English
Analog Output 1.0 – 2.5mm² max Optional Display 2.8” TFT
Digital Output 1.0 – 2.5 mm² twisted pair + ground, shielded cable with 120Ω characteristic impedance Optional LED Indication Green: Power (OK)
Yellow: Warning (Pre-Alarm)
Red: Danger (Alarm)
Relays 1.0 – 2.5mm² max
CONFORMANCE
Safety BS 61010-1 (CE / UKCA) Electromagnetic Compatibility BS 50270 (CE / UKCA)
Other (Applied or Considered) IGEM/UP/11, BS 50543

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