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New Price Books Available  

To view the latest Otis Instruments price books, please visit our website.  Registered users may download our current price books at any time by logging in at using their Customer Login.
WireFree Video 
Otis Instruments has produced a WireFree video to help our customers better understand the way our products function in the field. 

So that customers may view the video at any time, a WireFree Video link has been added to the bottom of our homepage.  To view the video now, click HERE.
2014 Product Catalog    

Our 2014 Product Catalog is now available.  To view a digital copy, click HERE.

If you would like to request a hard copy, please email
Industry Certified 
Otis Instruments products are CSA, ATEX and ABS certified.  To view our product certifications, click HERE.


Need an Otis system today?  Contact our Sales and Rentals office in Tyler, TX for product rentals.

To view available rental systems and pricing, please visit
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Open Path WireFree
Gas Detection System  

Otis Instruments has teamed with Spectrex Inc. to offer our customers the ability to detect flame and combustible hydrocarbon gases using state of the art technology. As shown below, Otis Instruments' OI-5900 4-20mA State Transmitter and OI-7010 Monitor--- when paired with the SafEye Quasar 900--- create a complete Open Path WireFree Gas Detection System.

Quasar 900

The Quasar 900 is an open path detection system that provides continuous monitoring for combustible hydrocarbon gases.


The Quasar 900 consists of a Xenon Flash infrared transmitter and infrared receiver, separated over a line of sight from 23 ft (7m) up to 660 ft (200m) in extremely harsh environments where dust, fog, rain, snow or vibration can cause a high reduction of signal.   


The Quasar 900 transmitter and receiver are both housed in a rugged, stainless steel, ATEX and IECEx approved enclosure.  



The OI-5900 is a WireFree state transmitter to be used in conjunction with a 4-20mA output sensor (such as the SafEye Quasar 900) via 4-20mA signal. Using an Otis Instruments Gen II monitor with the OI-5900 allows the unit to utilize relays and Modbus out.



The OI-7010 is a Hybrid Monitor available with 12 or 32 channels. It supports up to 12 or 32 WireFree sensor assemblies, and up to four 4-20mA input sensor assemblies.


The OI-7010 is backward compatible with Gen I WireFree sensor assemblies, and also supports Gen II Wirefree sensor assemblies (configurable).


Data Sheets:  

Quasar 900 Data Sheet 

OI-5900 4-20mA Transmitter Data Sheet 

OI-7010 Data Sheet  


For additional information, visit our website by clicking HERE.


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