Weed Instrument – The Only Name You Needto Know for Temperature Measurement

Whether you need a temperaturesensor or a complete temperaturemeasurement assembly, there’s aneasy way to solve your requirement,just contact Weed Instrument.

Think of us as an extension ofyour own team. From day one, wework with you to develop the bestsolutions for all your temperaturesensing needs. For the most cost-efficient, volume-oriented applications or high performance,one-of-a-kind designs, WeedInstrument offers the engineeringand manufacturing resources, andthe product quality, performance andreliability you need.

Manufacturing andQualityWeed Instrument was formed in 1968and is headquartered on the outskirtsof Austin, Texas. The company operates from a purpose built 50,000square foot (4,600 sq. m) facility.

Our Quality Program was established to meet the needs of abroad range of industries. In additionto being ISO 9001:2000 registeredwe are compliant with 10CFR50Appendix B, 10CFR21, ANSI N45.2,ASME NQA-1, ASME NCA3800, CSACan3-Z299.1 and AS 9100

We maintain an on-site, NIST traceable Metrology Laboratory thatprovides comparison temperature calibrations from -112 °F to 1112 °F (-80 °C to 600 °C) on the InternationalTemperature Scale (ITS-90). Relativecalibrations at the boiling point of liquid nitrogen are also performed.The Laboratory is fully equipped withfluidized baths and tube furnaces,standard platinum resistance thermometers, and thermocouples.Time response testing is in full compliance with ASTM E-644.

Many of our processes are propri-

etary and are geared to assure thatfrom initial concept to finished product, the integrity of the designis maintained. Each of our finelytuned manufacturing cells is configured to provide you with thehighest quality product, while maintaining lead times that areamong the shortest in our industry.

At Weed Instrument, we have theexperience, resources and technologyto meet and exceed your needs ontime, every time – guaranteeing TotalCustomer Satisfaction!

Weed Instrument provides one of theworld’s largest selections of catalogRTDs and thermocouples.

Our RTDs can be found globally inthousands of industrial, process andOEM applications, wherever perform-ance, reliability and economy are keyconsiderations.

We offer thermocouples for virtuallyevery high temperature process appli-cation, including smelting and melting,forging, heat treating, incineration andcogeneration, and utility & waste boil-ers. We also manufacture a wide

Catalog RTDs and ThermocouplesOver 250,000 versions – and most can be shipped within 48 hours or less

temperature measurement assembliescan be pre-configured with one of oureconomical, integral head mounted orDIN-rail temperature transmitters.

• RTDs: -320 °F to 1700 °F (-200 °C to 927 °C)• Strain Free, Wire Wound Elements• Thin Film Elements• Surface Mount Sensors

• Thermocouples: -320 °F to 2300 °F (-200 °C to 1260 °C)• Base Metal Types: J, K, T, E, N • Noble Metal Types: R, S, B • Other Types: M

choice of Magnesium Oxide (MgO)insulated thermocouples, in all thermo-couple element types, for variousprocess and laboratory applications.

All our RTDs and thermocouplescan be supplied with your choice ofelement materials, values, accuraciesand element leadwire configurations,together with a variety of sheath materials, lengths and diameters. Wealso offer a wide selection of eitherscrewed or flanged thermowells in various materials for most process fluids. In addition, all Weed Instrument

Weed Instrument sanitary RTDs,thermocouples, thermowells andtemperature transmitters have beendesigned to meet the environmentaland performance requirements ofpharmaceutical and biotech process-ing and sterilization applications.Most sensors feature enhanced per-formance specifications and 316Lstainless steel materials and can beelectropolished to a Ra of 0.2microns (8 microinches). Also, per-manently etched tagging informationand calibration certificates can beprovided.

A line of patented temperaturesensors that can be removed forrecalibration or replacement, withoutinterrupting the process, is alsoavailable.

Thermowells can be specified asweld-in or clamp style, with all 316Lstainless materials and electropol-ished finishes. Weld-in thermowellscan be supplied with material certifica-tions and permanently marked “heatnumbers”.

Weed Instrument manufactures a wideselection of RTDs for Autoclave steril-izer applications in the pharmaceutical,biotechnology and medical industries.These RTDs eliminate all of the prob-lems associated with standard probeswhere the pressure and vacuumcycling of autoclaves forces moistureinside the probe, resulting in incorrect,low temperature readings and reducedlife.

Our Autoclave RTDs are completelysealed. As a result, the entire sensorassembly of the Weed InstrumentAutoclave RTD, including the probeand cables extending from the RTD,can be completely submerged in waterwithout affecting accuracy or long-termstability.

We offer one of the broadest lines of3A compliant RTDs, thermocouples,thermowells and temperature transmit-ters for food andbeverage applica-tions. With a widevariety of sanitaryprocess connec-tions, chances arewe have an “off theshelf” model immediately available tomeet your specific needs.

BiopharmaceuticalTemperatureMeasurement

AutoclaveTemperatureMeasurement

Food & BeverageTemperatureMeasurement

R

Inventory TankGauging TemperatureMeasurement

Aerospace, Marineand Military VehicleTemperatureMeasurement

HVAC TemperatureMeasurement

Precise temperature measurement iscrucial for high accuracy monitoring ofproduct contained in bulk storagetanks. Any fluctuation in temperaturebetween two static measurements willdirectly result in a deviation of meas-ured volume, causing uncertainty. Tocompensate for this, high accuracytemperature measurement must beperformed to derive standard volumes.

Our products for this applicationinclude single point and multiple pointtemperature averaging sensors, pro-viding the highest accuracy of temper-ature measurement over the entireheight of the tank. Associated instru-mentation includes microprocessorbased analog and smart temperaturetransmitters and modular fiber opticconverters for tank data transmission.

Typical applications include:

• Petroleum Storage

• Organic Liquids

• Thermal Energy Storage

For the Aerospace, Marine and Militarymarkets, Weed Instrument designsand manufactures high reliability ther-mocouples and RTDs. We precisionwind our own platinum and nickelsensing elements, which allows us toproduce non-standard resistancecurves and values - maximizing performance for our customers. Allelements are calibrated to NISTstandards, and packaged to provideexceptional accuracy, reliability, anddesign flexibility for the harshest environments

Designed for high reliability and toendure demanding shock, vibrationand ambient environments, WeedInstrument RTDs and thermocouplescan be found in these applications:

• Bleed Air

• Cabin Air

• Engine Oil

• Gear Boxes

• Fuel Systems

• Cylinder Heads

• Climate Control

• Hydraulic Systems

Whatever your HVAC application, themost efficient control solution alwaysstarts with the best sensors. WeedInstrument HVAC sensors haveearned a global reputation for provid-ing exceptional reliability, performance,fast response and excellent value.

With one of the widest selectionsavailable and over 35 years experi-ence in the HVAC market, you can besure Weed Instrument is your righttemperature sensor partner. OurHVAC temperature measurementproducts include:

• Duct Averaging Sensors withContinuous Sensing Elements upto 50ft (15m)

• Room Air Sensors and Transmitters featuring Minimal Self-heating Error

• Bendable Area Averaging Sensors up to 100ft (30m) Length

• Spring Loaded Pipe Clamp Sensors

• Fluid Immersion Sensors

• Bolt-on Surface Sensors

• Outside Air Sensors

Weed Instrument knows how tosupport OEMs – with strong applications engineering, world classquality and low cost manufacturingcapability.

As a solutions company, we arecommitted to providing more thanjust catalog sensors and assemblies.Decades of application engineeringprovides the perspective and experi-ence to quickly prototype, build anddeliver your selection of custom quality temperature products.

Research and development teamssimulate actual application environ-ments, perform comprehensive environmental testing and evaluateall pertinent electrical factors.

Whether your requirement is for 10or 100,000 units, you can count onWeed Instrument to provide you withaccurate, reliable and economicalsensors.

We also offer you the opportunityto streamline your temperature sensor sourcing through value-addedassembly. To improve supply chainefficiency we can deliver you morecomplicated sub-assemblies instead

A full selection of economical, headmount and DIN-rail temperature trans-mitters is offered. Available certifica-tions include FM, CSA, ATEX and GL(ship building approval). Featuresinclude:

• 0.08% Accuracy

• Full Input-Output Isolation

• Custom Input/Linearization Capability

• Configurable via a PC or HART Communicator

• T/C Inputs: B, C, D, R, S, E, J, K, L, N, T, U

• RTD Inputs: Pt100, Pt500, Pt1000, Ni100, Ni500, Ni1000.

• mV Inputs: -10 to 75mV/Ohm Inputs: 10 to 2000 ohms

• Outputs: 4-20mA or 20-4mA with Optional HART Signal Superimposed.

Custom RTDs and Thermocouplesfor OEMs

TemperatureTransmitters

of just temperature sensors. So,whether your customization requiresa simple redesign of an RTD or ther-mocouple, or the design and manu-facture of a complete housing andelectronics, you can count on WeedInstrument to be a reliable partner forvalue-added assembly.

Typical applications include:

• Heat Tracing

• Waste Incinerators

• High Pressure Downhole Logging

• Fast Response Food Service Machines

• Rubber Compound and AggregateMixers

• High Pressure Hydraulic Line Temperature

• Filter Systems

• Off-Road Vehicles

Weed Instrument is the world’s largestsupplier of nuclear qualified RTDs,thermocouples and temperaturetransmitters. Today, 80% of NorthAmerican nuclear power plants relyexclusively on our temperature measurement instrumentation for critical reactor coolant monitoring.

We manufacture products that arequalified for use in all of the leadingreactor technologies, including PWR,BWR, CANDU (PHWR), and APWR

Our nuclear qualified temperatureinstrumentation includes a completeselection of sensors, thermowells andtransmitters qualified to IEEE-344(seismic) and IEEE-323 (environmen-tal) standards.

Accessories andConnection Heads

Plug and Play, IEEE 1451.4CompatibleTechnology

Weed Instrument offers a broad selec-tion of accessories to assist in theapplication of RTDs and thermocou-ples. Options include connectionheads, thermowells, quick disconnectplugs and jacks, sensor mounting fit-tings and compensated terminalblocks.

Most WeedInstrumenttemperaturemeasurement products can be sup-plied with “plug and play” technology,providing compatibility with the newIEEE 1451.4 standard. As a resultthey are recognizable to standardbased instrumentation and software.This means our sensors are instantlyidentified and automatically beginfunctioning in seconds.

In addition, everything you need toknow about your sensor is immediate-ly accessible...settings, calibration history, even location. So now you canbe confident that the sensor’s criticaldata is accurate. It can even store itsown calibration certificate! The bene-fits of this technology include:

• Faster Set Up Time

• Increased Reliability

• Improved Accuracy

• Open Standard Interoperability

Nuclear Qualified and Safety RelatedClass 1E TemperatureProducts

Weed Instrument Company, Inc.707 Jeffrey Way, P. O. Box 300Round Rock, Texas 78680-0300Phone: 800-880-9333 or 512-434-2900, Fax: 512-434-2901E-Mail: temperature@weedinstrument.comwww.weedinstrument.com

Nuclear QualifiedPressure TransmittersWeed Instrument supplies one of thebroadest ranges of pressure transmit-ters for nuclear qualified applications.Most of the instruments are qualifiedto IEEE-323/344 and versions areoffered for virtually every installation -from inside containment/harsh envi-ronment to applications requiring onlyseismic qualification or commercialgrade.

Models are available for the meas-urement of gauge, absolute or differ-ential pressure and output signalsinclude 4-20 mA, 10-50mA, HART,FOUNDATION Fieldbus, Profibus andFoxCom.

Fiber Optic Convertersfor Bus Systems andSerial Data Interfaces

Weed Instrument is a world leader inthe supply of Fiber Optic Networkingequipment for Industrial Control,Process Control and Automationapplications. We have over threedecades of experience in fiber opticnetworking technology and offer theworld’s largest selection of fiber opticconverters for PLC’s and DistributedControl Systems. Weed Instrumentfiber optic networking products arenow installed in over 150,000 loopsworldwide.

Fiber optics offers numerous advan-tages over copper based data trans-

Other Weed Instrument Products

mission. Electrical noise, harsh envi-ronments, long distances,reliability/security, surge protectionand corrosion issues are all easilyovercome with the simple, rugged andeasy to install technology of WeedInstrument fiber optic products.

They can be used in almost any net-work configuration, independent of topology, and versions are availablefor virtually every analog and digitalcommunication protocol.

Rev. 1, Pub: CAP-0409Specifications subject to change without notice.