Digital Thermometers, Thermometry Bridges

Digital Thermometers

In marketing a wide variety of products manufactured by some of the most experienced and knowledgeable companies we have had the opportunity to witness the consistent quality that results when companies combine decades of experience in their field with a commitment to manufacturing the best product they can.

When we sell digital thermometers manufactured by some of these companies our experience has been no different. We are happy to be the one stop solution for customers who are looking for dependable and accurate digital thermometers for a wide range of applications and industries.

Our line of digital thermometers includes models ideal for high accuracy temperature measurement, calibration and testing. Our precision digital thermometers are offered with a wide range of standard features, a variety of flexible options, and as always—accuracy, dependability, quality and value.

Our precision digital thermometers are perfect for use in a variety of settings such as in quality assurance departments in the process industries and for calibrating temperature probes in ISO-9000 applications. In addition to being accurate the digital thermometers we provide are also flexible. For example, customers will have no problem finding a digital thermometer to suit applications requiring high accuracy temperature measurement as well as value storage for data processing.

Features of our high accuracy digital thermometers include:

Analog output via BNC socket
Digital thermometers feature two-channel input with A, B or A-B measurement on an LCD display
Easy storage of probe characteristics for optimum accuracy
Front panel keys for easy access to commonly used functions
High Accuracy 0.01 °C
High Resolution 0.001 °C
Optional rechargeable battery with built in charger
Pull down menus to easily access additional functions such as the selection of thermocouples
Scanner cards can be interchanged to offer 10 channels for Pt100, 10 channels for thermocouples, or 4 channels for thermocouples plus 4 channels for pt100 plus 2 front panel inputs
Scanner option to provide input for thermocouple as well as Pt100 sensors
Statistical analysis
The ability to reduce the measuring current by half power to check the self-heating ability of the probes
Two interface options
Versatility, Flexibility and Accuracy with unparalleled cost efficiency

Digital Thermometers

3000 Series	F100	F200
F250	Accu-Temp	Type K Thermometer

Thermometry Bridges

Over the years, Electri-Temp has made it a priority to ensure that we continually offer our customers the best resistance standards available. Electri-Temp is the one stop solution for resistance measuring equipment; just like every one of our other product lines our goal is to provide our customers with accurate and dependable thermometry bridges and resistance thermometers. We look forward to providing our customers with thermometry bridges and resistance thermometers engineered specifically for reliable and accurate resistance thermometry, as well as the service to ensure that customers look to us in the future.

You can’t go wrong with thermometry bridges provided by Electri-Temp. Our thermometry bridges offer not only precision data and precision calibration but incredible value. It doesn’t matter if the thermometry bridge will be used for high accuracy thermometer calibration or research—they can be relied on. Thermometry bridges provided to customers by Electri-Temp are a solution that can be trusted to consistently deliver accuracy, precision and functionality. Our products give you the peace of mind of not having to second guess your equipment or its accuracy.

Features of our thermometry bridges are varied to suit a wide range of applications. For instance, we offer models capable of 2, 3, and 4 wire connection that are constructed with high quality switches and high accuracy wire wound resistance elements. The careful attention to detail paid by our manufacturing partners such as Cropico Ltd is clear in products such as our thermometry bridges and resistance thermometers. The precision of our resistance bridges offers an example of what you get when you combine experience and a relentless dedication to quality.

Customers have access to extremely high accuracy and resolution at competitive price. In addition, our thermometry bridges and resistance thermometers are complete with a variety of value-added features to help ensure consistent and precise measurements. Our resistance bridges feature:

Calibrated to IEC 751, DIN 43760 and BS1904
Calibration Traceable to International Standards
Convenience
Ease of use
High accuracy at demanding temperatures
High Accuracy Wire-Wound Resistance Elements
High Calibration Accuracy
High Quality Switching
Multiple Models available
Precision, accuracy, and economy
Rugged Construction
Statistical Analysis
…and more

Thermometry Bridges

F600

F700

Digital Thermocouple and PRT thermometer 3000

Best Quality Data plus Value for Money
The Series 3000 is a digital thermometer of very high accuracy (0.01 °C) and very high resolution (0.001 °C) at an economical price. To ensure that the very best measurements are achieved, PRT probe characteristics may be entered and stored using either CVd or ITS90 coefficients. The measuring current may be reduced by 0.707 to determine self-heating of the probe and may also be reversed automatically to optimise any thermal emf errors.

Convenient and Suitable for All Applications
The Series 3000 digital thermometer comes with many options. 2 channel inputs which enable you to compare thermocouples directly against a standard PRT (platinum resistance thermometers). This is ideal for those wishing to calibrate thermocouples. It also lets you measure or calibrate any mix of probe types (Pt25/Pt100/Thermocouple, RTD/RTD, Thermocouple / Thermocouple) and display A, B or A-B on a large LCD Graphics Panel (240x64 Dot, LED back light contrast control via keyboard). The Series 3000 is linearised for 13 thermocouples Pt25 and Pt100: the choice of which to display is yours.

Full Instrument Control
The Series digital thermometer 3000 can be incorporated into automated measuring systems thanks to the RS232/IEEE-488 optional interfaces.

Statistical Analysis
The Series 3000 digital thermometer provides a maths functions to enable the statistical analysis of stored or filtered values to be displayed (mean, max/min, peak values, standard deviations). You do not need a separate data logger. The display may also be set to display the rolling average value and standard deviation.

Memory
The Series 3000 digital thermometer is sold as standard with a data logging function with memory for 4000 single channel readings with date and time (2000 dual channel). The stored values can be recalled to the instrument display and scrolled through using the keyboard or can be downloaded to a PC file or printer.

Real Portability by switching to Battery Power
The Series 3000 digital thermometer gives approximately 8 hours of continuous operation thanks to the rechargeable sealed lead acid battery. A mains internal charger is also built in for added convenience and flexibility. It is very ruggedly constructed and housed in an aluminium case for maximum safety.

Easy to use
The Series 3000 digital thermometer has dedicated front panel keys for the most commonly used functions and menus for the enhanced features.

Security and Peace of Mind
The Series 3000 digital thermometer offers digital calibration with pass code entry for optimum security.

Other Important Features
A scanner (optional) can be fitted to a slot in the rear panel. Two types are available for thermocouple or RTD scanning. Two scanner cards may be fitted per instrument, each card has 4 channels, the front input sockets are also available giving up to a maximum of 10 channels. There is no reduction in accuracy performance when the scanner cards are used.

Key Features
• Best Quality Data plus Value for Money
• High Accuracy 0.01 °C
• High Resolution 0.001 °C
• Convenient and Suitable for all Applications
• Compare Thermocouples / PRTs
• Full Instrument Control with RS232 or IEEE-488
• Statistical Analysis
• Memory for 4000 single channel readings
• Real Portability by Switching to Battery Power
• Easy to Use
• Security and Peace of Mind

F100 Handheld Precision Thermometer

Features
• Accuracy: ±0.02°C over full range
• Resolution: 0.001 °C
• Range: -200°C to +850°C
• Stability: 0.005°C per year
• Common inputs for "SMART" and normal PT100 and Thermistor probes
• USB communications port as standard
• Display in °C, °F, K (Kelvin) or ohms
• Statistical functions: Average, Min/Max and Standard Deviation

Performance with handheld convienience

High performance handheld 2-channel thermometer for Pt100 and Thermistor probes. If you're looking for a step up in measurement accuracy with a battery powered, handheld thermometer, F100 is for you.

F100 can handle all your needs, with accuracies and resolutions normally associated with a bench top thermometer. Two inputs give you direct temperatures from Pt100 or Thermistor probes, or you can display the temperature difference between them. You can log measurements directly to memory or, if you prefer, use the USB port to control and data log with your PC. F100 will display for you a statistical analysis of your measurements, with average value, min and max values and standard deviation. Because F100 will display in ohms as well as temperature, you can even use it to calibrate one probe against another.

Most instruments require you to enter calibrated probe data into memory to optimize measurement accuracy, which can mean a lot of data entering if you change probes regularly. With ASL's SMART connector on your probes, you only need to store the data once - in the connector! The calibration data stays with the probe - permanently. You can even use it on another F100 without any further action. The SMART connector saves you time and reduces error. If you have existing calibrated or uncalibrated probes, no problem, F100 automatically registers if a probe is SMART or normal.

F200 Series Precision Thermometers

Features
• Accuracy: ±0.01°C over full range
• Resolution: 0.001°C
• Range: -200°C to +850°C
• Stability: 0.005°C per year
• SMART probe option

New F201 3/4 wire PRT Precision Thermometer

New High Performance 2 or 8 channel, 3 and 4 wire Precision Digital Thermometers for use with calibrated and uncalibrated Pt100 probes, with great new features for increased usability and lower life-costs.

Using calibrated probes with the F200 thermometer series you choose between storing calibration data into memory in the instrument or into the probe's proprietary "SMART" connector. Calibration data stays permanently with the probe in this connector, which the F200 series instantly recognizes, ensuring best measurement accuracy. Better yet, the ASL SMART connectors use the ASL standard 5-pin DIN connector, so you can use probes with normal, passive connectors on the same input. How's that for versatility.

Using a built-in calibration routine, the operator can re-calibrate the F200 instrument range using a calibrated, traceable reference resistor. This feature is password protected.

Other features have been included for F200 range when using SMART probes, like the Temperature Watchdog and the Calibration Status Monitor. The Temperature Watchdog, continuously monitors the temperature of SMART probes and, if any are used outside their specified working range, the probe history record is updated. This way you can see at a glance if your probes have ever been used outside their calibrated range, as this may affect their calibration validity. The Calibration Status monitor alerts you with an on-screen message when a SMART probe is due for recalibration.

F250 Precision Thermometer

Features
• Accuracy: ±0.01°C; up to ±0.02°C with probe
• 4 wire AC bridge for stability without recalibrating
• Selectable resolution of 0.001°C or 0.01°C over full range
• Range: -200°C to +962°C depending on probe
• Switchboxes for up to 32 direct or 16 differential channels

Typical Applications
• Site Standard
• Research
• Viscometry
• Multi-channel logging
• Measure in ratio, ohms,°C, °F or K

ASL's F250 provides high accuracy, dual channel temperature measurement with Platinum Resistance Thermometers - PRTs - and uses AC bridge technology as developed by ASL for Standards Laboratories throughout the world. Model F250 requires no regular recalibration, the AC circuit techniques eliminating thermal EMFs and drift, while providing excellent long term stability. Front panel data entry allows you to enter probe calibration data into the F250's memory, so that thermometer resistance can be accurately converted to temperature in °C, °F or K. A security key prohibits unauthorised or accidental data entry. The combination of proven technology and sophisticated microprocessor control gives you a reliable, easy to use precision instrument.

Using F250 with SB250 Switchbox

The 8 or 16 channel SB250 switchbox complements the F250 in appearance and performance. Adding no extra system errors you can use one or two switchboxes, one each on inputs A and B, with either manual switching from the keypad or under interface control. Configuration examples are; a single switchbox attached to input A, lets you read up to 8 or 16 thermometers directly, or measure them differentially to a probe on input B. Similarly with two switchboxes, one each on inputs A and B, you can read up to 32 probes directly, or 16 differential pairs. SB250 switchboxes turn the F250 into a powerful logging system when used with ASL's U-LOG data logging software.

Tecal Accu-Temp RTD Thermometer

The Tecal Accu-Temp is a good choice for use as a laboratory grade reference thermometer. It's available in a single or dual channel model, along with direct temperature readout in degrees F, C and ohms. Combine the Tecal Accu-Temp with one of our secondary standard PRT's for a high accuracy temperature measurement system. Don't rely on battery operated, low accuracy hand-held model PRT indicators for your critical temperature measurements.

Features and Benefits:
• User Programmable linearization (ITS90)
• Accepts either 10, 25.5 or 100 ohm Platinum RTD's
• Direct digital readout in ° C, ° F, and ohms
• Temperature accuracy of thermometer
• Temperature and ohmmeter resolution of 0.001
• Wide temperature range -200 to +800° C
• Uses ITS90 coefficients for probe correction and linearization
• Accepts probe alphas of either 0.385 or 0.3925
• Optional accessories: analog output, RS-232 and IEEE-488 interfaces
• Switchable 120 or 240volt operation
• Dimensions: 3 1/2"h x 8 1/2"w x 11 1/2"d
• Weight: 9 lbs. (12 lbs. shipping)
• Free logging software (RS232 required)
• High accuracy: ±0.005ºC(0.009ºF) at -100C, ±0.005ºC(0.009ºF) at 0C, ±0.007ºC(0.013ºF) at 200C, ±0.011ºC(0.020ºF) at 400C and ±0.013ºC(0.023ºF) at 500C
• Ohm meter uncertainty: ±0.002 ohms or 15 ppm
• 1 year warranty - Includes NIST traceable calibration

Economical Type K Hand-held Thermocouple Thermometer

An inexpensive Type K thermometer for making temperature measurements when high accuracy is not required. Each unit includes a type K bead probe for general purpose measurements.

Features
• Single input
• Type-K thermocouples
• -200 to +1,370°C measurement range
• 0.1°C/0.1°F resolution
• Autoranging
• 60 VDC/24 VACrms input protection
• Auto power off
• REL/HOLD/MAX/MIN functions
• Includes Type K bead thermocouple
• Accuracy at 23ºC ±5ºC

Range	Accuracy
-200 to 200ºC (-328 to 392ºF)	±(0.3% reading + 1ºC)+2ºF
200 to 400ºC (392 to 752ºF)	±(0.5% reading + 1ºC)+2ºF
400 to 1370ºC (752 to 2498ºF)	±(0.3% reading + 1ºC)+2ºF

For ambient temperature outside of the above range add the following tolerance into the accuracy spec 0.01% of reading +0.03ºC

Thermometry Bridges, F600 Secondary Standards Bridge

Features
• Accuracy: up to ±0.5mK
• Resolution: 0.1mK
• 25Hz / 30Hz or switched DC carriers
• Use with PRTs, and Thermistors (F600 DC only)
• 2 to 60 channels
• Large multi-function (VFD) display
• Measure in ratio, ohms,°C, °F or K

F600 is a new series of high performance resistance thermometry bridges from ASL that is unique in offering the latest technology in both AC and DC measurement. Integrity in measurement has always been a hallmark of ASL instruments and F600 continues that tradition.

However, now you have an even lower frequency AC bridge, or switched DC measurement technology to choose from, according to your needs.

F600 is the first product from ASL that is available as an AC Bridge and as a DC instrument enabling you to choose the best suited to your application, or to compliment your existing equipment. The AC bridge now operates at the lower frequency of 25Hz (50Hz supply) or 30Hz where your power supply is 60Hz, while the DC version provides a switched DC sensor current to simulate the advantages of AC - AC bridges eliminate entirely the errors caused by thermal emf's* in the probe or associated wiring.

F600 is easy of use and is versatile in operation. You can choose and save what information you want to display on-screen as an aid to efficient working. You can also choose to select or change functions, such as probe current, by a dedicated switch or from within the menu displayed on screen.

For multi-channel applications, F600 operates with ASL's existing switch box systems to allow system expansion to 60 channels.

Thermometry Bridges, F700 Secondary Standards Bridge

Features
• Accuracy: ±0.5ppm (±0.5 micro K over full range)
• Resolution: 0.25ppm (0.25 micro K over full range)
• Linearity: ±1 LSD (0.25 micro K over full range)
• Warm up time: < 30 seconds

The Model F700 is a high accuracy resistance bridge designed specifically for resistance thermometry. Its unique AC bridge circuitry eliminates thermal EMF effects to provide you with fast, reliable measurements under a wide range of real operating conditions. A special input guard circuit maintains accuracy by minimising the effect of probe or cable leakage to ground. The effect of cable and probe reactance is eliminated by an on-board quadrature servo allowing you typically to make measurements up to 100 metres from the PRT. The differential capability allows the resistance of one PRT to be measured against another directly and provides the most accurate comparison calibration technique.

The F700 can be used with one or more switchboxes for multi-channel calibration.

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