Business Empire

The Purafil OnGuard® Smart (OGS) Atmospheric Corrosion Monitor indicates the level of corrosion before severe damage occurs, preventing costly downtime and maintenance repairs. The OnGuard’s copper and silver sensors measure the rate of corrosion in real-time. An internal data logger stores the results to be accessed through the internet or directly transmit to a process control system. The latest generation of OnGuard monitors now includes a room pressure sensor, and Wi-Fi capabilities.

Features

• Tracks peaks and trends to determine the level of corrosion
• Measures temperature, relative humidity, and room pressure
• Low maintenance: Sensors remain reliable until reaching 4000 Angstroms of cumulative corrosion
• Direct interface provided by the backlit LCD and keypad
• Remote power from network cable (PoE)
• 4-20mA connection for existing facility management systems or distributed control systems (DCS)
• Accurate within ± 1% of full span

Benefits

• Indicates the level of corrosion before damage occurs, preventing costly repairs/downtime
• Ethernet and Wi-Fi enabled
• Easy remote access to data and graphs
• RoHS compliant
• Measures corrosion, room air pressure, temperature,

and relative humidity on a continuous basis

• Provides incremental and cumulative corrosion data
• Easy to install
• Long service life
• Readings correspond to ISA Standard 71.04-2013

Principle of Operation

The OGS comes with two quartz crystal microbalance (QCM) sensors, one that is plated with copper and anoth­er with silver. The QCM is used to measure the corrosive film that results from the environment. This highly sensitive method of measurement will indicate contaminant levels at or less than one part per billion (1 ppb). The corrosion film thickness is measured and recorded in Angstroms (Å). This measurement corresponds directly to ISA Standard S71.04-2013.

Additional Information:

• Delivery Time: Available
• Packaging Details: As per company standard

The Corrosion Classification Coupon (CCC) measures the amount of corrosion that forms on copper and silver surfaces. This provides data allowing an industry standard classification of the amount of corrosion present, as well as identifying contaminant classes. Because many contaminants are corrosive in nature (e.g., hydrogen sulfide and sulfur dioxide), reactivity monitors have long been used to gauge the quality of ambient air and to indicate the effectiveness of pollution control strategies. Purafil’s CCC is a passive reactivity monitoring technique involving the use of copper and silver.

Typical CCC Installation Sites

Industrial and Mission Critical Environments:

Control Rooms, Rack Rooms, Motor Control Centers, Data Centers, Server Rooms, and Critical Parts Storage Rooms.

Museum and Library Environments:

Recirculation Air Handlers, Storage Rooms, Display Cases, Archives, and Historic Houses.

Clean Room Manufacturing Environments:

Semiconductor, HDD, LED, and more.

Customer Benefits

• Unobtrusive, easy installation and data gathering
• Economical investment for determining air quality
• Scientifically supported, reliable results
• Provides the documentation required for manufacturers’ warranty compliance
• Vital for determining corrective solutions to protect equipment, processes, and artifacts

Copper and Silver Analysis

After an installation period of 30 days, the CCCs are collected from the field and returned to Purafil’s laboratory for analysis. The purpose of CCC analysis is to determine the type and thickness of corrosion films on the surface of each metal coupon. A normalized 30-day reactivity rate is calculated using the amount of time the metal coupon is exposed and the thickness of the corrosion that has formed.

ISA Environmental Classes: Airborne Contaminants

This standard requires that rooms containing backplane wired equipment, instrumentation, process control systems or computers, must have a G1 environmental classification, defined in terms of corrosion thickness as 0-299 Angstroms (Å) per 30 days on copper and 0-199 Å per 30 days on silver coupons. Purafil provides a report that directly correlates to the G1, G2, G3, and GX ratings.

ISA STANDARD ANSI / ISA-71.04-2013

Severity Level

Copper Corrosion

Silver Corrosion

G1 – Mild

<300 Angstroms / 30 days

<200 Angstroms / 30 days

G2 – Moderate

<1000 Angstroms / 30 days

<1000 Angstroms / 30 days

G3 – Harsh

<2000 Angstroms / 30 days

<2000 Angstroms / 30 days

GX – Severe

>2000 Angstroms / 30 days

>2000 Angstroms / 30 days

Additional Information:

• Delivery Time: 2-3 weeks
• Packaging Details: company packing -9310690627