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Field Metrology Wells


Small dry wells for big field applications
The new 914X Series Field Metrology Wells extend high performance to the industrial process environment by maximizing portability, speed, and functionality with little compromise to metrology performance.

Field Metrology Wells are packed with functionality and are remarkably easy to use. They are lightweight, small, and quick to reach temperature set points, yet they are stable, uniform, and accurate. These industrial temperature loop calibrators are perfect for performing transmitter loop calibrations, comparison calibrations, or simple checks of thermocouple sensors. With the “process” option, there is no need to carry additional tools into the field. This optional built-in two-channel readout reads resistance, voltage, and 4-20 mA current with 24 volt loop power. It also has on-board automation and documentation. Combined, the three models (9142, 9143, and 9144-each with a “process” option) cover the wide range of -25 °C to 660 °C.

High performance for the industrial environment

Field Metrology Wells are designed for the industrial process environment. They weigh less than 8.2 kg (18 lb) and have a small footprint, which makes them easy to transport. Optimized for speed, Field Metrology Wells cool to -25 °C in 15 minutes and heat to 660 °C in 15 minutes.

Field environment conditions are typically unstable, having wide temperature variations. Each Field Metrology Well has a built-in gradient-temperature compensation (patent pending) that adjusts control characteristics to ensure stable performance in unstable environments. In fact, all specifications are guaranteed over the environmental range of 13 °C to 33 °C.

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4180 Series Precision Infrared Calibrators


·Fast, portable and easy to use
·Correct target size for most thermometers
·Calibration solutions from -15 °C to 500 °C (5 °F to 932 °F)
·Radiometrically calibrated for traceable and consistent results

Should your thermometer be calibrated by one of these?
Business decisions costing thousands of dollars are based on the results of your measurements, so they had better be right! It can be very expensive to shut down a line for repairs and maintenance, but it might be catastrophic if the shutdown is unplanned. To stand by your measurements with confidence, you should definitely have your thermometers calibrated.

How to get consistent results:
Even those infrared thermometers that cannot be adjusted can benefit from a calibration that demonstrates the consistency and validity of your results. A trusted calibration means less worry, fewer questions and more time being productive. To get more reliable, traceable, and consistent results, buy a precision infrared calibrator from Fluke’s Hart Scientific Division. The 4180 Series of Precision Infrared Calibrators for infrared thermometers is fast, accurate, and easy to use. It comes with an accredited calibration from one of the world’s most trusted temperature calibration laboratories, sample calibration procedures for Fluke thermometers built right in and everything you need to get started making high-quality infrared thermometer calibrations. This is the perfect solution for any 8 to 14 mm infrared thermometer within its temperature range.In addition, with accuracies as good as ± 0.35 °C, the 4180 Series can meet its specifications without additional emissivity-related corrections, leading to legitimate test uncertainty ratios (TUR) as good as 4:1. (See the sidebar below for information about common pitfalls in infrared calibrator accuracy and have a look at our Guide to Infrared Thermometer Calibration to get started quickly with your new calibrator.) The accuracy specification is the combined result of the radiometric calibration uncertainties, target stability and uniformity, and the expected drift over a one year calibration interval.

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Industrial Dual-Block Thermometer Calibrator


·Temperatures from -15 °C to 350 °C in one unit
·Two wells in each block for simultaneous comparison calibrations
·Rugged, lightweight, water-resistant enclosure
·ou’ve been asking for it and now we’re making it for you.  Hart’s new Model 9009 Industrial Dual-Block Calibrator lets you calibrate at hot and cold temperatures at the same time.  Double your productivity or cut your calibration time in half-either way you look at it, your in-field temperature calibrations just got easier.
·The Model 9009 includes two independently controlled temperature blocks.  The hot block provides temperatures from 50°C to 350°C, while the cold block covers the range -15°C to 110°C.  Each block is controlled by a precision Hart Scientific temperature controller.  These aren’t some off-the-shelf controllers we glued into a box.  These are Hart Scientific controllers from the leading temperature company in the world.
·Each temperature block includes two wells with removable inserts.  You can calibrate four probes at once, or you can calibrate two probes at the same time with an external reference (like Hart’s Model1521 LLK Thermometer ), or you can use the two temperature wells to get quick “zero” and “span” references for transmitter calibrations.
·Need portability and durability?  The 9009 is housed in a tough Pelican™ case that is both airtight and watertight.  It’s a small package weighing only 10 pounds, yet it fits everything you need, including a power cord and four extra inserts. Inserts are available to accommodate sensors of any size from 1/16" (1.6 mm) to 7/16” (11.1 mm).  This rugged system can go anywhere.
·Of course the 9009 also delivers the performance you expect from a Hart Scientific temperature source. The cold block is calibrated to within ±0.2°C with stability of ±0.05°C.  The hot block’s display is accurate to ±0.6°C with stability of ±0.05°C. A NIST-traceable calibration is included for each of the two test blocks.
·For use with automated systems, the 9009 comes with an RS-232 connection and our Model 9930 Interface-it software, which allows you to control and monitor temperatures from your PC.  For completely automated calibrations, Hart’s MET/TEMP II software also integrates with the 9009.
·Two blocks in one unit, a total range of -15°C to 350°C, portability, durability, versatility, performance, automation. Hart Scientific delivers it all.

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Field Dry-Well Calibrators

·Lightweight and very portable
·Accuracy to ±0.25 °C
·RS-232 and Interface-it software included
·Easy to recalibrate

If you’ve been using dry-well calibrators for field work, you know there’s a lot more to a dry-well than its temperature range and stability. Size, weight, speed, convenience, and software are also significant. 

Field dry-wells need to be portable, flexible, and suitable for high-volume calibrations or certifications. If they’re not, you’ll soon forget about the great stuff the sales rep told you and realize what you’ve really bought. 

At Hart Scientific, we use dry-wells every day in our manufacturing and calibration work, and we know what makes a dry-well easy and productive to use-which is exactly how users

describe our series of field dry-wells. These dry-wells work for you instead of the other way around. 

These three units beat every other comparable dry-well in the industry in performance, size, weight, convenience, ease of calibration, software, and price. In addition, the heating and cooling rate of each of these dry-wells is adjustable from the front panel, thermal switches can be checked for actuation testing, and multiple-hole inserts are available for a variety of probe sizes. 
Hart dry-wells are easy to calibrate. You don’t even have to open the case. This means less maintenance costs and less down time when they do need calibration. 

Our Interface-it software lets you adjust set-points and ramp rates, log dry-well readings to a file, create an electronic strip chart, and perform thermal switch testing with data collection. The software is written for Windows and has a great graphical interface. Regardless of whether you want basic software or a completely automated calibration system, we’ve got what you want. Read about all our great packages starting on page 80. 

Every dry-well we ship is tested at our factory, and every unit comes with a NIST-traceable calibration. There’s no extra charge for the report, because we consider it an essential ingredient in our quality program. You shouldn’t have to pay extra for calibration procedures we perform anyway. 

The 9103 covers below-ambient temperatures as low as -25 °C. The 9103 is stable to ±0.02 °C, and its display is calibrated to an accuracy of ±0.25 °C at all temperatures within its range. In just eight minutes, 0 °C is reached, and 100 °C is reached in six minutes, so your time is spent calibrating-not waiting. 
The 9103 reaches temperatures 50 °C below ambient, so -25 °C is reached under normal ambient conditions. Our competitors like to advertise their units as reaching -45 °C when they really mean -45 °C below ambient, which typically means it will go to -20 °C. Our unit does not require you to work in a walk-in freezer to achieve its full advertised range. 

Choose one of three removable inserts sized for probes from 1/16 inch to 1/2 inch in diameter. Insert A handles a full range of probe sizes with a single well of each size. Insert B features two wells each of 3/8, 1/4, and 3/16 inches in diameter for doing comparison calibrations. Insert C has six 1/4-inch-diameter wells for multiple probe calibrations, and Insert D has three pairs of metric sized wells. 


The 9140 has a temperature range of 35 °C to 350 °C, and it reaches its maximum temperature in 12 minutes. At six pounds, it’s small enough to easily carry in one hand. It’s truly a unique innovation in dry-wells. 

The unit has a stability of ±0.05 °C or better and a uniformity of at least 0.4 °C in the largest-diameter wells and 0.1 °C in the smaller wells. Despite its small size, this unit performs. 

Use the display, calibrated to ±0.5 °C, as your reference, or use an external thermometer for maximum calibration accuracy. With three removable inserts to choose from, the 9140 is as versatile as it is fast.


Here’s an upright unit you’re going to love. It does calibrations up to 650 °C, weighs only eight pounds, and heats up to 650 °C in only 12 minutes-12! This dry-well does everything but get legs and walk to the job for you. (And we’re working on one that does that too.) 

This four-inch-wide dry-well is amazing. You can control all functions from the front panel or hook it up to your PC with its built-in RS-232 port. And just like the 9140, it works with all of our software described on page 80

It has three removable well inserts available, an optional carrying case, a NIST-traceable calibration, and the best price in the industry. 

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Thermocouple Furnace - 9150

·Low-cost thermocouple furnace
·NIST-traceable calibration included
·RS-232 port standard

You told us you weren’t satisfied with the competition’s furnaces for checking industrial thermocouples. You said you wanted something new and more convenient to use-and you wanted it at a lower price than any other furnace available. Well, we’ve got what you asked for, and it’s the Model 9150 Thermocouple Furnace from Hart Scientific. 

With a stability of ±0.5 °C, it has a temperature range to 1200 °C and a display accuracy of ±5 °C across its entire range. 

With interchangeable temperature blocks, you can check thermocouples as small as 1/16 of an inch in diameter. The 9150 works with 115 or 230 VAC power. 

The 9150 Thermocouple Furnace uses Hart’s own microprocessor-based controller for great stability and set-point accuracy. It has a removable well insert for versatility. It has rapid cool-down and heat-up times. And it comes with an RS-232 port for connection to a PC. 

You can now afford to check your thermocouples with this excellent cost-effective instrument. Why pay more for features you don’t need and can’t use? Each unit is factory-calibrated and comes with test data and a calibration traceable to NIST. 


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Secondary Standard Platinum Resistance Thermometer, PRT, Temperature Sensors - Models 5626 and 5628

·Range to 661°C
·Meets all ITS-90 requirements for resistance ratios
·Rtp drift < 20mK after 500 hours at 661°C
·Clibrated accuracy of ± 0.006 °C at 0 °C
·Hart’s high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs and more expensive, highly accurate SPRTs. 

·If you’re using block calibrators, furnaces, or temperature points above normal PRT temperatures (420 °C), then these two PRTs are for you. The 5626 is nominally 100W and the 5628 is nominally 25.5W. Both instruments have a temperature range of -200 °C to 661 °C. They make great working or check standards for calibration work up to the aluminum point. 

·Using a regular PRT at temperatures above 500 °C exposes the platinum to contamination. If the PRT is used as a reference or calibration standard, contamination is a major problem. SPRTs, which are more expensive and delicate, can handle the higher temperatures, but with greater risk to the instrument due to shock, contamination, or mishandling. The 5626 and 5628 are designed to reduce the contamination risk through the use of internal protection while not impairing performance. 

·In addition to the right measurement performance and durability, a PRT for secondary applications should be priced affordably. Hart’s new PRTs are inexpensive and come with an accredited calibration. The calibration comes complete with ITS-90 constants and a resistance-versus-temperature table. 

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Secondary Reference Thermistor Probes

NEW thermistor brings high accuracy to harsh chemical environments and hard to reach places. 5611T DATA SHEET

·Teflon® encapsulated thermistor
·Stainless steel sheathed thermistors
·Silicone coated thermistor
·Ordering Information

§Short-term accuracy to ± 0.01 °C; one-year drift < ± 0.01 °C
§Accredited NVLAP calibration optional 
§Flexible Teflon and silicone coated fast-re

Hundreds of thousands of thermistors are sold every year, but only a few have the stability necessary for use as high-accuracy thermometry standards. If you're looking for economical lab-grade thermistor probes for accurate work across a narrow temperature range, Hart's Secondary Reference Series thermistor probes are the best you can buy. 

These thermistors are available in a variety of sheath materials appropriate for your specific application. In addition to our metal-sheathed probes, we offer flexible Teflon encapsulated and silicone coated thermistors that have smaller tips and can measure those places where even a metal-sheathed thermistor can't reach.
Teflon encapsulated thermistor 
The 5611T is an especially versatile Teflon coated thermistor probe. With a Teflon encapsulated tip that is just 3 mm (0.12 in) in diameter and a Teflon coating that makes it impervious to most liquids, the Teflon Probe is handy for measuring in a wide variety of applications, including bio-pharmaceuticals. It's even immersible to nearly 20 feet and flexible enough that you could roll it up into a ball in your hand if you wanted to! 
The 5611T's thermistor bead is encapsulated in a Mylar sleeve that is encapsulated inside a Teflon sleeve. The Teflon sleeve is then melted around the Teflon-insulated cable, forming a moisture-proof seal. 

Stainless steel sheathed thermistors 
Our stainless steel metal-sheath probes include our 5610-6 and 5610-9 immersion probes, as well as our 5665 fully immersible probe. These probes are great for measuring in air, liquid or soil.

Silicone coated thermistor 
With a diameter at the tip of just 1.5 mm (0.06 in), the 5611A's tip has the smallest diameter of any of our secondary reference thermistors and can fit nearly anywhere. Its faster response time, flexible sheath, and silicone coating make the 5611A great for use in many applications. However, applications involving silicone oil could damage the thermistor and should be avoided.

Higher performance 
All of Hart's secondary reference thermistors have small diameters and very small sensing elements, which means they require far less immersion than a PRT to avoid errors caused by stem effect. Self heating is usually negligible, giving them an advantage when taking measurements in air. Their small size also improves response time, allowing measurements to be taken more quickly. 
If your application involves frequent handling, you'll be especially interested to know thermistors are less susceptible to mechanical shock than PRTs. The bottom line may be better accuracy in fieldwork. 

Additionally, higher base resistance and larger resistance coefficients make it easier to achieve precision readings with thermistors, so better resolution and accuracy are possible for a lower cost. All of these thermistors have a negative temperature coefficient of resistance (NTC). For additional information about thermistors, please see “Thermistors: the under-appreciated temperature standards” in our current catalog.

These probes come in a complete assembly ready for use, and each works well with the uncertainties of our thermometer readouts: the 1504 Tweener , the 1523 and 1524 Handheld Thermometers, the 1529 Chub-E4 , the 1560 Black Stack , and the 1575A and 1590 Super-Thermometers. 
These probes provide most accurate readings when coupled with a 2563 Standards Thermistor Module or 1590 Super-Thermometer, but they are most portable when used with a handheld Reference Thermometer.

Calibrated accuracy 
What's more, the Secondary Reference Series Thermistors are accurate to ± 0.01 °C and cover the temperature range of 0 °C to 100 °C. They come with a NIST-traceable calibration and a resistance-versus-temperature table printed in 0.1 °C increments that can be interpolated to 0.0001 °C. NVLAP accredited calibrations as single thermistors or as systems combined with their readouts, are also available

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Micro-Bath Thermometer Calibrators

·World’s smallest portable calibration baths
·Calibrates sensors of any size or shape
·Stability to ±0.015 °C

Ranges from -30 °C to 200 °CNeed portability and extreme stability? Hart Micro-Baths have both. We invented the Micro-Bath. And, while many have tried to duplicate it, none of them use proprietary Hart Scientific controllers, so none of them deliver performance like a Hart bath. Micro-Baths can be used anywhere for any type of sensor. The 6102 weighs less than 4.5 kg (10 lb.), with the fluid. It’s lighter and smaller than most dry-wells, has a spill-proof lid, and is easier to carry than your lunch. You can take it where you need to go without carts or excessive effort. Micro-Baths can even be transported with the fluid in them. 

Wherever you go with your Micro-Bath, you can count on its performance. Each model is stable to ±0.03 °C or better, depending on the fluid you use. Uniformity is ±0.02 °C or better for low uncertainties using a reference thermometer. Display accuracy has been improved to ±0.25 °C for quick calibrations without a reference thermometer. In short, you get the stability and precision of a liquid bath in a dry-well-sized package. Don’t be fooled by competitors who pour oil into a dry-well and call it a bath. Hart Micro-Baths are maximized for true fluid-bath performance. 
With a 48 mm (1.9-inch) diameter, 140 mm (5.5-inch) deep tank, a Micro-Bath can calibrate any type of sensor including short, square, or odd-shaped sensors. The problems of fit and immersion are virtually eliminated by using a fluid medium rather than a dry-block calibrator. Micro-Baths are perfect for liquid-in-glass and bimetal thermometers. 

The 6102 has a temperature range from 35 °C to 200 °C, the 7102 covers -5 °C to 125 °C, and the 7103 extends from -30 °C to 125 °C. Stability, uniformity, and accuracy specifications cover the entire range for each bath, not just the best temperature. 

All Micro-Baths have RS-232 ports, come with our Interface-it software, and can be used with Hart’s MET/TEMP II software (described on page 81 . Also included are contacts to calibrate a thermal switch, eight set-point memory storage, ramp-rate adjust, and over-temperature safety cutout. 

You may have noticed we haven’t touted our CFC-free refrigeration. Yes, cold Micro-Baths are CFC-free, and also compressor-free. That’s right-no heavy, noisy compressor to lug around. We achieve our temperature range and stability with only one moving part. This means more durability and less weight. 
Hart manufactures and sells temperature calibration baths of every size and shape, and now we have the smallest and lightest baths in the industry to go with the dozens of other models we make. 

Look at the specs, price, and value of these portable instruments and you’ll know why Hart Scientific is the number-one company in this business. 

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Fluke Precision Digital Thermometer Readouts and Reference Thermometers

A Fluke precision digital thermometer readout is specifically designed to measure temperature sensors for calibration. The purpose of the readout is to measure a temperature sensor’s resistance or voltage and display a temperature. However, not every instrument that simply measures resistance or voltage is well suited for work with PRTs, RTDs, thermocouples or thermistors. Because thermometer readouts are designed for calibration, they offer many advantages, especially convenience and accuracy.

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The "DewK" Thermo-Hygrometer

·Superior accuracy 
·NEW! Network enabled 
·Powerful logging and analysis tools 
·Two interchangeable calibrated sensors 
·Huge memory

Two types of sensors are available from Hart, and the DewK may be originally purchased with either one. The high-accuracy sensor (“H” model) reads temperature to ± 0.125 °C over
a calibrated range of 16 °C to 24 °C.
Relative humidity readings are to ± 1.5 %RH from 20 %RH to 70 %RH. 
The standard-accuracy sensor (“S” model) reads temperature to ± 0.25 °C over its calibrated range of 15 °C to 35 °C. Relative humidity readings are to ± 2 %RH from 20 %RH to 70 %RH. 

All DewK sensors come with NVLAP accredited certificates of calibration for both temperature and humidity, complete with data and NIST traceability. Hart provides exceptional uncertainties, including total test uncertainty ratios better than 3:1 for both temperature and relative humidity-even for the high-accuracy sensors! 
Both sensors can also measure temperature below their respective calibrated ranges to 0 °C and above their respective calibrated ranges to 50 °C with typical accuracy of ± 0.5 °C. And RH readings from 0 %RH to 20 %RH and from 70 %RH to 100 %RH are typically within ± 3 %. 

Ethernet and wireless capability 
The DewK gives you all the communications options you expect, and then some. With its built-in Ethernet RJ45 jack, multiple DewKs can be monitored from the same screen using our new LogWare III client-server software. Ethernet also gives you the possibility for remote connectivity over the internet, so you can monitor critical conditions while you’re away. 

Cables running along the floor can be a safety hazard, and cables hanging from the ceiling and walls are an eyesore. With the DewK, your wireless dreams will come true when you connect your computer through an RF modem up to 100 ft away, without the clutter of all the extra cables! 
Finally, if you need a printout, send data to a printer through the RS-232 interface in real time. 

Math and statistical functions 
In addition to temperature and humidity, the DewK calculates dew point, heat index, and rates of change for both temperature and humidity, without the need to buy additional software. Min, max, and a variety of other statistics are also calculated and can be shown on-screen.  Daily summary statistics, including min, max, and maximum rates of change are stored for the most recent sixty days.

Calibrated sensors 
With the DewK you get two for the price of one. Having inputs for two sensors, each measuring both temperature and relative humidity, one DewK can monitor two locations at the same time. Both sensors can be run via extension cables to remote locations up to 100 feet away, or one sensor can be directly mounted to the top of the DewK. 

Each sensor is calibrated for both temperature and humidity at Fluke’s Hart Scientific Division. The calibration constants assigned to the sensors reside in a memory chip located inside the sensor housing, so sensors may be used interchangeably between different DewKs, and the recalibration of sensors doesn’t require an accompanying DewK. 

Sensors may also be assigned a unique identifier (up to 16 characters) to facilitate record keeping by matching the sensor identifier with the collected data. Each DewK ships with one sensor, with additional sensors available from Hart. Spare sensors may also be purchased as a kit, which includes a case for the sensor, a wall mounting bracket, and a 25-foot extension cable. 

The DewK has enough on-board memory to store up to 400,000 date- and time-stamped data points. That’s two years’ worth of data for both measurements from two sensors if readings are taken every ten minutes! 

Alarms and battery backup 
Alarm settings can be set up quickly in the DewK based on temperature, the rate of change in temperature, RH, the rate of change in RH, and instrument fault conditions. Alarms can be both visual (flashing display) and audible (beeping). Likewise, alarm settings can be set up and events triggered in LogWare III. The DewK is also equipped with a 0 to 12 volt alarm output that can trigger a process control system. 

A backup battery shuts down the DewK’s display but maintains measurements for up to 16 hours in the event of a power failure.
One very cool display 
Want to view data from across the room? Want to view data from two temperature and two humidity inputs simultaneously? Want to view data graphically, statistically, or both? At the same time?! The DewK does everything you could want-or at least everything we could think of. Up to sixteen different display setups can be stored and recalled at the touch of a single button. And all 16 can be easily modified, so you get exactly what you want.