Campbell OBS-3A Spezifikationen PDF herunterladen (Seite 7)

Section 1. Introduction

The heart of the OBS-3A monitor is an OBS



sensor for measuring turbidity

and suspended solids concentrations by detecting near infrared (NIR) radiation

scattered from suspended particles. With a unique optical design, OBS sensors

perform better than most in situ turbidity sensors in the following ways:

1. Small size and sample volume

2. Linear response and wide dynamic range

3. Insensitivity to bubbles and organic matter

4. Rejects effects of ambient light and temperature change.

The OBS-3A includes a temperature sensor and may be equipped with pressure

and conductivity sensors. Batteries and electronics are contained in a housing

capable of operating at depths of up to 300 meters, depending on which

pressure sensor is installed. A survey cable may be used to tow the OBS-3A

and a depressor weight by clamping a cable harness to the housing.

FIGURE 1-1. Dimensions

FIGURE 1-2. Components

362 mm (14.3”)

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76 mm

(3.0”)

USE HOSE CLAMPS HERE

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1-1

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Campbell OBS-3A Spezifikationen Seite 7