McNab Model AP-VIE Concentration Monitor / Controller

Printable Version

Special Features:

• Reduced cost
• Easy installation, no Indicator/Controller (I/C) panel
• Second cabinet not required for water-proofing
• Available in proven sanitary (non-o-ring) design
• Air purge or air driers for moisture control in optics
• Relative humidity (RH) indicator to alert potential window fogging
• 10 times illumination of LED
• Avoids lamp aging resistance drift
• Avoids field inter-connecting cable calibration
• Automatic correction of lamp darkening

Technical Papers

• Turbidimeter system controls ash waste

• Turbidimeter system prevents shutdowns

• Turbidimeter system reduces fuel and water costs, eliminates need for pollution control capital equipment

Description

The Model AP-VIE Concentration Transmitter is a compact sensor with integrated electronics. It measures changes in the amount of light from the light source that is received at the photoelectric scanner. It continuously monitors concentration, suspended solids interface or color, by direct measurement in the process pipe. The optical cell “no o-ring” sealing meets sanitary requirements as set forth by EHEDG.

Model AP-VIE provides immediate center-of-the-pipe measurement at full pressure and temperature, eliminating the delay of off-line sampling. The information is transmitted to the customer computer or process controller using a 4-20 mA analog signal. Internal relays are available to open or close valves when designated concentration levels are reached.

Installation involves mounting optical ferrules on a vertical run of pipe (with upward flow) where the process measurement is needed. Visual inspection of the light path can be done at any time during operation by removing the photo sensor head from the optical cell and looking through the optical cell like a sight glass.

Technical Drawings

• AP-VI Digital Meter (80347)
• Pipe Installation Guide - Flow Cell Locations (A01-14)
• AP-VIE Installation Drawing - Optical Ferrules (A92-96)
• Optical Flow Cell Assembly (A93-25)
• Figure 8 - Fabrication of Flow Cell
• Figure 11 - Fabrication of Flow Cell

Specifications

A89-50D