28301 Industrial Blvd. Suite Q
Hayward, Ca. 94545

Phone: 510.293.8700
Fax: 510.293.8710


Welcome to the Manesco Corporation

The Century OVA

The century Organic Vapor Analyzer is the best FID (Flame Ionization Detection) unit in use today for Natural Gas Leak surveys. When looking at the unit it doesn't look flashy or hightech, however, it gives you the most accurate reading than any other instument in use today. When it comes to public safety, you want the best equipment for the job. The OVA goes back to basics. It gives a straight reading without all the fanfare. That's why for years, companies like PG&E, SoCal Gas, San Diego Gas and Electric still use the OVA today.
The portable Century OVA is reliable and accurate for continuous direct read-out of total organic vapor concentrations. The OVA 128, has three concentration ranges that span from 0 to 1000 ppm, in hazardous waste applications that include emergency spill response, site evaluations, remedial investigation and soil gas monitoring.
The application of the OVA 88 and OVA 108 is mainly for leak detection in, pipelines, process streams, landfill monitoring and EPA Method 21 testing. Concentration range is from 0 to 10,000 ppm. Both models carry FM and BASEEFA approvals for intrinsically safe use in Class I, Division 1, Groups A, B, C and D. The
dilutor kit extends the instrument’s dynamic range by a factor of about ten.



OVA 108

OVA 128


1 to 10,000 ppm

0 to 10, 0 to 100, 0 to 1000 ppm

Minimum Detection Limit (Methane):

0.5 ppm

0.2 ppm

Response Time:

1-2 seconds to 90% of the reading

Sample Flow Rate:

2 liters per minute (approximate)


Audible alarm, user adjustable

Power Source:

12V DC rechargeable battery with up to 8 hours of


continuous operation.


12" x 9" x 4"



12 lbs.


The staff at Manesco have over 35 years of experience with the OVA. Our surveyors use the OVA to detect leaks out in the field. We service, maintain, refurbish, sell and rent out these instruments. Manesco is the only company in the U.S. that carries the right parts for the OVA. We can maintain the OVA and guarantee that the instrument will perform at or above original factory specifications. No matter how old, or worn out your instument is, Manesco can maintain it. In this type of business, when public safety is top priority, you can't take short cuts.

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