US-SQS/L Submersible Spherical Micro Quantum PAR Light Sensor from WALZ

Especially under water or when working with suspensions, the amount of scattered light is very high, so that a spherical sensor should be used. The US-SQS sensor uses a plastic diffuser to obtain an angular response error of less than ± 5% from -100° to 100° angle.

For photosynthesis research, sensors with spectral and directional sensitivity relevant for plants are required.

Spectral Response:
US-SQS sensor uses a plastic diffuser to obtain an angular response error of less than ± 5% (-100…100° angle). Fig. 3 shows a typical angular response curve.

The solid line shows the ideal response of a photon fluence sensor for photosynthetically active radiation (PAR, defined for the 400 – 700 nm wavelength range. For comparison Fig. 2, shows the response to energy fluence rate from 350 – 750 nm.
Angular Response

US-SQS sensor uses a plastic diffuser to obtain an angular response error of less than ± 5% (-100…100° angle).

US-SQS/L
The US-SQS/L is the plain sensor without additions. The sensor has a 3 m long cable and a BNC plug. Possible connections are:

- ULM-500

- WATER-PAM-II

US-SQS/IB
The US-SQS/IB consists of the US-SQS/L sensor plus an adjustable black hood that fits on mountings for suspension cuvettes. See US-SQS/L for possible connections.

US-SQS/B
The US-SQS/WB comprises the US-SQS/L sensor, a black hood, and an amplifier box. The hood fits on mountings for suspension cuvettes. Technically the connection for the US-SQS/WB is the same as for the Leaf Clip Holder 2030-B.
Possible connections are:

- DUAL-PAM-100 (AUX input)
- MINI-PAM (Input for 2030-B Leaf Clip)
- MULTI-COLOR-PAM (Ext. Sensor input)
- PAM-2500 (Input for 2030-B leaf clip)
- PAM-CONTROL (AUX Input)
- PHYTO-PAM-II, included in standard delivery (Light Sensor Input).

US-SQS/B
The US-SQS/B comprises the US-SQS/L sensor, a hood, and a battery powered amplifier box. The US-SQS/B is connected to:

- PHYTO-PAM, included in standard delivery (AUX-Input).