Multi Sensor Monitor Model SM-500 :
- The Apogee Guardian controlled environment agriculture (CEA) monitor is an elegant device that provides accurate measurements of important indoor environmental parameters.
- The Guardian is a user-friendly datalogger with multiple integrated sensors to measure PAR (SM-500) or ePAR (SM-600), air temperature, humidity, vapor pressure deficit and dewpoint, CO2 concentration, barometric pressure, daily light integral, and photoperiod.
- Two Models SM-500 : Full-spectrum is accurate for measuring 389-692 nm under all light sources including LEDs and SM-600: ePAR is accurate for measuring the newly discovered extended PAR (ePAR) 383-757 nm range under all light sources.
- Data Collection and Display : Graphical summaries of environmental measurements can be downloaded to dataloggers via Modbus or smartphones via Bluetooth with the ApogeeConnect app (iOS/Android). While the Guardian can take measurements as a stand-alone device mounted to a mast or hung by thin wires, it can also integrate into systems for greenhouses, grow rooms, and vertical farms via Modbus or Bluetooth.
- Rugged Design : The Guardian is constructed from high-quality ASA plastic with low thermal conductivity and a gloss white finish in selective areas to lower emissivity with an IP rating of IP53. The Guardian is filled with foam to provide additional thermal insulation. Additionally, a quantum sensor is mounted on the top of the shield to measure PAR (SM-500) or ePAR (SM-600). The internal airway utilizes a small venturi constriction to maximize airflow efficiency over the thermistor, which minimizes the thermal boundary layer’s influence on temperature measurements. Simultaneously, a separate module used to measure CO2, humidity, and pressure is aspirated by a passive, low velocity airstream using a “fluid entrainment” principle
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