Intrinsically safe RTDs

Tel-Tru expands selection of temperature sensors for hazardous areas.


Tel-Tru temperature sensors for hazardous areasTel-Tru Manufacturing Company, supplier of temperature and pressure instrumentation, has expanded its line of RTD (resistance temperature device) probe assemblies and temperature transmitters. Intrinsically safe models are now available for sanitary and industrial applications.

The company says its new models ISPAA3 and INPAA3 are cCSAus Intrinsically Safe certified to Class I, Div. 1, Groups A, B, C, and D when used with approved zener barrier systems. The assemblies include a thin-film PT100 platinum RTD sensing element, packaged in an all welded 316L stainless steel probe. Probes are available in .187 and .250 in. diameters with a choice of lengths ranging up to 12 in.



40 Under 40 – Control Engineering: Know someone working in automation under age 40 in need of some recognition? See the 40 Under 40 awards.


Standard probe assemblies include threaded process connections and may be used with a separately purchased thermowell. Sanitary probe configurations are also available featuring Tri-Clover fittings and surface finishes that comply with 3A Standard 74-03 for food, dairy, beverage, pharmaceutical, and chemical processing applications.

General purpose connection heads are offered in either die-cast aluminum or 316 stainless steel.  An FDA approved polypropylene head for sanitary applications is also available. Output formats include 4-20 mA, HART, Profibus, and Foundation Fieldbus. Overall range capability is –60 to 500 °F, which can be scaled in the field or at the factory.

Edited by Peter Welander,
Control Engineering

Visit the Process Control Channel.

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance

(copy 5)

click me