Peracetic acid (PAA) is an extremely strong oxidizer widely used in the food industry for disinfection of piping systems and processing equipment. It is also used for spray washing of food products and for disinfection of cooling water systems. As a disinfecting agent, PAA is often preferred because it produces no harmful breakdown products.

As with any disinfection system, maintaining proper residual values is the key to effective pathogen control. To facilitate reliable chemical feed control, ATI has developed an on-line monitor cable of providing real time measurement of low levels of PAA in solution. The Q45/85 Peracetic acid monitor uses a direct sensing polarographic probe mounted in a flowcell to measure PAA residuals in a flowing water stream. A permeable diffusion membrane isolates the sensing electrodes from the measured sample, providing long term stability without electrode fouling problems. The measurement is selective for PAA and is not affected by changes in hydrogen peroxide in solution.

Features

• Available in AC powered, battery powered, or 2 wire loop powered versions
• Real time PAA measurements suitable for chemical feed control
• Standard PID control output
• Second analog output plus two alarm or control relays on AC powered units
• Large, easy to read LCD display with LED back light
• Display range of 0-20, 0-200 or 0-2000 ppm operator selectable
• direct reading PAA sensor requires minimal maintenance
• NEMA 4X (IP-66) electronic packaging suitable for wall or panel mounting

Specifications

Measurement Type	Peracetic Acid, (PAA) C2H4O3
Sensor Type	Amperometric membraned cell
Range	0-20.00 ppm minimum, 0-2000 ppm maximum
Display	Large character LCD with LED back light
Response Time	90% in 60 seconds
Accuracy	±0.5 ppm or 2% of full scale
Sensitivity	0.01 ppm minimum
Zero Stability	±0.2 ppm per week
Electronic Linearity	±0.5%
Span Drift	Generally less than 5% per month
Analog Outputs	2-wire Version: 1 isolated 4-20 mA, 575 ohms max AC Version: 2 isolated 4-20 mA, 575 ohms max Battery Version: 2 0-2.5 VDC, 200K min input
Power	24 VDC for 2 wire version, 115 or 230 VAC, 50/60Hz 5 VA max or two AA cells
Alarm Relay	Two SPDT, 5 A@230 VAC resistive
Relay Coil	Programmable either normally energized or normally de-energized
Enclosure	NEMA 4X, wall or panel mount
Controls	4 membrane switches on front of monitor
Operating Temperature	0 - 50°C
Sample Inlet	¼" ID hose barb
Sample Drain	½" id hose barb
recommended Sample Flow	6-15 GPH (0.4-1.0 LPM)
Weight	5 pounds

Ordering Information

For pricing please call AFC International at 800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.

Description	Catalog No.
Model Q45/85 PAA Monitor, 2-wire, Constant Head Flowcell, 25' Cable	Q45/85-1-1
Model A45/54 PAA Monitor, Battery Operated, Sealed Flowcell, 25' Cable	Q45/85-5-2

Downloads

Model A45/85 Peracetic Acid datasheet