Disclaimer 
 
This manual provides important safety and technical information of the OPW Rack monitor 88XX-series. It is 
important that this manual is read and understood completely by the installing technician prior to installation.  
 
88XX is a secondary overfill prevention monitor for protecting loading operations from overfilling. It performs two 
functions i.e. grounding and overfill monitoring and is compatible with 2 and 5 wire optic probes. 
 
OPW Engineered Systems  OPW guarantees the customary normal quality and soundness of the items 
delivered during the guarantee period and that this product is adequate for the stated use in chapter 0 and is in 
accordance with the Directive(s) stated in the declaration of conformity in this manual. 
 
OPW Engineered Systems cannot be held responsible for incorrect use of the RACK MONITOR 88XX. The Rack 
Monitor 88XX is for the use of monitoring of loading of tank trucks with the application and parameters stated in this 
manual. In case this OPW Rack Monitor 88XX is used in another location then mentioned in the initial 
quotation or is abused, all guarantees will be declined.  
 
This installation manual is an integral part of the supplied product and must at all times be supplied with the Rack 
Monitor 88XX when it is relocated or sold to a third party. All pages of this manual must be in accordance to the 
table of contents. If not, please contact the OPW Engineered Systems. 
 
 
© COPYRIGHT 2024. The design, drawings and documentation are the exclusive property of OPW Engineered 
Systems. It is submitted on the condition that the designs contained therein are held confidential and is subject to 
return on demand. 
 
Apart from exceptions provided by the law, nothing from this publication may be duplicated and/or published by 
means of photography, microfilm, storage in computer files or otherwise, which also applies to full or partial 
processing, without the written consent of OPW Engineered Systems  
 
Although the outmost care has been taken with this publication, errors and omissions cannot be entirely excluded. 
The OPW Engineered Systems therefore accepts no liability, not even for direct or indirect damage, occurring due 
to or in relation with the application of publications issued by OPW Engineered Systems  
 
This is an OPW Engineered Systems product. For technical assistance, information and/or complaints contact: 
 
 
OPW Engineered Systems 
 
9393 Princeton Glendale Road   
Hamilton, Ohio 45011 
Customer Service: 513-932-9114 or 800-547-9393 
Technical Support:  800-524-8226 
E-MAIL: opwes.insidesales@opwglobal.com 
Website: www.opw-es.com