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Produkt Grensesnitt


SM-600: Full-Spectrum Guardian CEA Multi-Sensor Monitor

Greenhouse guardian, PAR, CO2, Temp, RH

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Produktnummer: SM-600 Kategori: Stikkord: , , , , ,

The Apogee Guardian is an elegant device that provides accurate measurements of important indoor environmental parameters. The SM-600 is a user-friendly datalogger with multiple integrated sensors to measure extended PAR, air temperature, humidity, vapor pressure deficit and dewpoint, CO2 concentration, barometric pressure, and daily light integral* and photoperiod* (*only accessible via Bluetooth). Graphical summaries of these measurements can be downloaded to dataloggers via Modbus or smartphones via Bluetooth with the Apogee Connect app (iOS/Android). While the SM-600 can take measurements as a stand-alone device mounted to a mast (AM-270, coming soon) or hung by thin wires, it can also integrate into systems for greenhouses, grow rooms, and vertical farms via Modbus or Bluetooth.

The SM-600 is constructed from high-quality ASA plastic with low thermal conductivity and a gloss white finish in selective areas to lower emissivity. The Guardian is filled with foam to provide additional thermal insulation. 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. Additionally, an extended quantum sensor is mounted on the top of the shield to measure ePAR.

The Guardian comes in two model versions: the SM-500 and SM-600. The models are identical in all ways (size, function, and appearance) except for the embedded light sensor. The SM-600 sensor measures extended photosynthetically active radiation (ePAR), which includes far-red photons, while the SM-500 does not. For the PAR option, please see our SM-500 model.

Depending on the selected package, there are different cable types and lengths available:

  • L-5: Includes a 5-meter pigtail cable
  • L-10: Includes a 10-meter pigtail cable (+NOK 350)
  • L-20: Includes a 20-meter pigtail cable (+NOK 650)
  • AC: Includes a 5-meter USB power-only cable and AC adapter



• Product Manual

• Specification Sheet

• Technical Drawing





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Calibration Uncertainty: ± 5 %
Long-term drift (non-stability): Less than 2 % per year
Measurement Repeatability: Less than 0.5 %
Measurement Range: 0 to 4000 µmol m-2 s-1
Spectral Range:  383 to 757 nm
Field of View:  180°
Directional Response:  ± 5 % at 75° zenith angles
Azimuth Angle:  Less than 0.5 %
Tilt Error:  Less than 0.5 %
Non-linearity:  Less than 1 % (up to 4000 µmol m-2 s-1)
Response Time:  Less than 1 ms
Temperature Response:  -0.11 % ± 0.04 % per C
Uncertainty in Daily Total:  Less than 5 %
Operating Environment:  -40 to 60 C with 0 to 95 % relative humidity
Housing:  White ASA housing
CO2:  Range 0-2000; ± 50 ppm + 2 %
Temperature:  ± 0.2 C
Humidity:  Range 0-95 %; ± 3 % 20-80 %
Vapor Pressure Deficit (25 C):  ± 0.08 kPa
Barometric Pressure:  70 to 110 kPa
Connectivity:  Modbus (RS232 and RS485) and Bluetooth
Power Requirements:  5-32 V DC; Typical: 100 mA; Peak: 500 mA
Data Storage Capacity:  9 months of 1 min data
IP Rating:  IP53 rating for harsh environments
Dimensions:  6.2 x 4.2 inches
Mass:  392 g
Cable:  6 conductor, shielded wire with TPR jacket and M8 connector (available in 5, 10, and 20 m lengths; 5 V 1A USB power adapter and 5 m USB to M8 connector cable)
Warranty:  4 years against defects in materials and workmanship
Manufactured:  Assembled in the USA