Specifications for US-SQS/L

All specifications are subject to change without prior notice.

Design of sensor: 3.7 mm diameter white plastic diffusing sphere connected via internal 2 mm plastic light guide with detector

Sensor housing: Stainless steel

Signal detection: High stability silicon photovoltaic detector (blue enhanced) with filter set for PAR correction (380 to 710 nm)

Signal output in air: Typically 3.5 μA / 1000 μmol m-2 s-1

Response time of photodiode: Rise and fall time of photocurrent (RL = 50 Ω; VR = 5 V; λ = 850 nm; IP = 800 μA): 25 ns

Temperature coefficient of photodiode: 0.18 %/K

Absolute calibration: In air, with correction for the spectral difference between the calibration lamp and sun light: ± 5 %

Immersion coefficient: 1.72 ± 2%

Angular response: < 5 % error up to 100° from normal axis

Azimuth: < 5% error over 360° at 90° from normal axis

Power supply: Not required

Operating temperature: - 5 °C … + 45 °C

Submersible: Down to 2.8 m below water surface (only sensor and its cable – not the connector)

Application: Measurement of photosynthetic photon fluence rate in air or water

Connects to: E.g. ULM-500

Connector: BNC

Signal output: Typically -3.5 μA / (1000 μmol m-2 s-1) in air

Cable length: 3 m

Size: Diameter 1 cm, length: 11 cm

Weight: 62 g

Application: Suspension cuvette

Connects to: E.g. ULM-500

Connector: BNC, includes hood for suspension cuvette

Signal output: Typically -3.5 μA / (1000 μmol m-2 s-1) in air

Cable length: 3 m

Size: Sensor: Diameter 1 cm, length: 11 cm; Hood: Diameter 3.4 cm, height: 3.2 cm

Weight: 85 g

Application: Suspension cuvette

Connects to: WATER-PAM, DUAL-PAM-100,
ULM-500 (AUX), PAM-2500 and MINI-PAM (instead of Leaf Clip Holder 2030-B or 2060 M)

Connector: Same as Leaf Clip Holder 2030-B Includes hood for suspension cuvette, amplifier for aux input of PAM Control

Signal output: 0…2.5 V DC / 0…1000 μmol m-2 s-1 or 0…2.5 V DC / 0…20.000 μmol m-2 s-1 Power
Provided by connected instrument

Cable length: 3 m + 0.5 m

Size: Sensor: Diameter 1 cm, length: 11 cm; Hood: Diameter 3.4 cm height: 3.2 cm; Amplifier: 5 x 5 x 5 cm (W x L x H)

Weight: 175 g

Application: Suspension cuvette

Connects to: PHYTO-PAM

Connector: Includes hood for suspension cuvette, amplifier for aux input of Phyto-PAM control unit

Signal output: 0...2.3 V DC / 0...172.5 μmol m-2 s-1 or 0...2.3 V DC / 0...3450 μmol m-2 s-1, automatic adjustment

Power: 9-V-Block battery

Cable length: 3 m + 1.5 m

Size: Sensor: Diameter 1 cm, length: 11 cm; Hood: Diameter 3.4 cm, height: 3.2 cm; Amplifier: 10.5 x 5.5 x 4.5 cm (W x L x H)

Weight: 450 g