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About Cosasco

Cosasco Corporate Headquarters, Santa Fe Springs, CA USA

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Cosasco has been the world leader in corrosion monitoring since 1950. Cosasco offers a wide range of solutions to corrosion problems in a variety of industries, including oil and gas, petrochemical, water treatment, chemical, pulp and paper, and pharmaceutical. We design and manufacture corrosion monitoring systems and equipment including instrumentation, probes, coupons, mechanical access systems, and integrated corrosion management servers and software.

Cosasco is committed to providing products and services of the highest quality level commensurate with the state-of-the-art in the industries it serves. Our objective is to produce safe and reliable products which meet in all respects the specifications published by the Company for those products and which conform to the particular requirements of each specifications and application conditions to the extent that such are made known to and are accepted by the Company.

Quality Management using BSI EN ISO 9001:2015, CE and ATEX

We are fully certified and comply with the BSI EN ISO 9001:2015 Certification. ISO 9001:2015 is the most stringent and has emerged as the premiere quality certification which encompasses everything from design through manufacturing and customer service.

In addition to the ISO certification many of our products conform to EU directives such as CE, and ATEX product standards. We are committed to product conformance to these equipment directives and are continually in the process of bringing additional products into compliance.


2015 Rohrback Cosasco Systems shortens its name to Cosasco to reflect the company’s evolving business direction to unite its varied product lines and global offices under a single, strong name.

2014 Rohrback Cosasco Systems is Acquired by Halma plc.

2013 Rohrback Cosasco Systems releases the new DCHA Downhole Coupon Holder and Ultracorr2 IS Ultrasonic Reader/Data-Logger and Wall Thickness Monitor.

2012 Rohrback Cosasco Systems opens a new offices in China, Canada, and Middle East to further expand its sales and customer service support, Corrosion Monitoring Commissioning & training, and Cosasco Services and Training.

2011 Rohrback Cosasco Systems opens a new office in Perth, Australia to further expand its worldwide sales and customer service support.

2010 Rohrback Cosasco Systems opens a new office in Singapore to further expand its worldwide sales and customer service support, Corrosion Monitoring Commissioning & Training, and Cosasco Services and Training.

2009 Rohrback Cosasco Systems announces the release of the new Microcor Wireless Transmitter for wireless corrosion monitoring in any process environment.

2007 In keeping up with the latest technology, RCS starts development on its new Microcor Wireless Corrosion Transmitter.

2006 Rohrback Cosasco Systems opens a new office in United Kingdom to further expand its worldwide sales and customer service support.

2005 Rohrback Cosasco Systems opens a new office in Houston, Texas, USA to provide greater support to its Gulf Coast customers.

2003 Corrpro sells RCS which Rohrback Cosasco Systems becomes an independent company committed to developing new products, markets and technologies for the corrosion related industry.

1994 Masco Corporation retires from energy indstries and RCS is sold to Corrpro.
RCS joins the Corrpro Companies family.

1989 MASCO takes over full ownship of RCS.
Rohrback Cosasco Systems introduces the Integrated Corrosion Monitoring System
(ICMS™ product line) to integrate CORROSOMETER® and CORRATER® technologies.

1984Rohrback Instruments and COSASCO® merge to form Rohrback Cosasco Systems.

1977 The Instrument Division of Magna Corporation becomes Rohrback Instruments.

1974 Grant Oil Tool Company becomes part of MASCO Corporation and established COSASCO® products as an international leader in corrosion monitoring with branch office in the United Kingdom, the United Arab Emirates, Singapore, and throughout the United States.

1962 The CORRATER® product line was introduced by Magna's Corporation's Instrument Division.
1957 Stern & Geary publish theory related to CORRATER® development.
1953 Development work began on what would ultimately become the Patent CORROSOMETER® product line in 1982. Initial sales of this breakthrough technology took place three years through Magna Instruments.
1950 The founding of Corona Oil Sales and Service Company (COSASCO®).
COSASCO's world-renowned 2" access fitting was introduced, and the first high-pressure
Retriever made its debut.

Worldwide Locations

Corporate Headquarters, USA
11841 Smith Avenue
Santa Fe Springs, CA 90670 USA
Tel: +1-562-949-0123
Fax: +1-562-949-3065

Sales Offices

Houston, Texas, USA
Northgreen Business Park
1408 N. Sam Houston Parkway E,
Suite 146, Houston, TX 77032
Phone: +1 (281) 219-8200
Fax: +1 (281) 219-7745 

Aberdeen, Scotland, United Kingdom
Units 1 & 2, Technology Centre,
Aberdeen Science & Energy Park,
Claymore Drive, Bridge of Don,
Aberdeen AB23 8GD
Phone: +44 (0) 1224 825500
Fax: +44 (0) 1224 825505

51 Goldhill Plaza
Singapore 308900
Phone: +65 6255 2822
Fax: +65 6255 1191

Perth, Australia
4/147 Main Street, Osborne Park
Perth 6017, Australia
Phone: +61 8 94432396
Fax: +61 8 63161417

Beijing, China
Room 1008, Tianchen Plaza 
Yi-12 Chaoyangmen North Street 
Dongcheng District, Beijing, P.R.China 100020
Phone: +86-10-6551-6135
Fax: +86-10-6551-6130



Cosasco has over 70 representatives worldwide to provide sales and support for all Cosasco products and services. Individual representative contact information on our Locate a Representative

Cosasco Care Services

Cosasco Care Services offers a wide range of corrosion monitoring services including:

  • SAFR Services
  • Chemical Injection & Optimization
  • Data Management & Reporting
  • Design, Installation, & 
  • Commissioning
  • Safety Awareness Training
  • Microbiological Monitoring & 
  • Data Collection
  • Technical Sales & Support
  • Corrosion & Erosion Consultancy

Main Customers

  • ConocoPhillips – China, USA
  • Chevron Offshore – Thailand
  • BP – Alaska
  • Pemex – Mexico
  • Hess – Thailand
  • Saudi Aramco – Saudi Arabia
  • ABB Lumus – Russia
  • Daewoo – Angola
  • Ashland Chemical – USA
  • Nalco – USA