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Electrometers
A selection of superior electrometers is available for accurate measurements of an extremely wide range of brachytherapy sources, external beam and diagnostic x-ray applications.
1.
SuperMAX Electrometer
2.
Max 4000 Electrometer
SuperMAX
Electrometer
SeeDOS Code
90018
Click here
for a detailed pdf brochure on the SuperMAX Electrometer
A next generation, two channel, reference grade
electrometer with an advanced, intuitive touchscreen interface,
built-in chamber library for real-time dose and dose rate display,
and 1 fA resolution.
TWO INDEPENDENT MEASUREMENT CHANNELS
The SuperMAX Electrometer features two measurement
channels with independent control over range, bias voltage, and applied
system factor. Both channels feature extensive range (0.001 pA to 500.0
nA, 0.001 pC to 999.9 μC) for use in a wide range of applications such
as cross calibration between two chambers, isocenter versus off-axis and
in-air versus in-water comparisons. The SuperMAX is designed to maximize
flexibility encouraging the freedom to experiment with its measurement
capabilities.
COMPREHENSIVE BUILT-IN CHAMBER LIBRARY
A versatile chamber library is built into the SuperMAX
interface, so no additional PC or software is necessary to apply system
factor and temperature/pressure corrections. These factor applied
measurements are even displayed in real-time side by side with raw
measurement values for increased analysis capability. Over 100 different
chambers and calibrations can be stored within the SuperMAX internal
memory.Individual factors can be applied to either
or both measurement channels.
POWERFUL, YET EASY TO USE INTERFACE
The 6.4” color TFT display has a built-in touchscreen to
make measurement control and data entry intuitive and enjoyable.
Measurement values are shown with large type and corrected values are
shown in a different color for easy viewing and confirmation of
settings, even from a distance. An on-screen keypad and familiar pull
down menus makes entry of settings such as bias voltage, threshold
detection settings, and chamber library
data nearly effortless.
Features and Benefits
Versatile Charge Collection Modes
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Triggered collection with automatic start, stop, and
saving of data
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Threshold detection levels programmable for both high
and low range
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Timed collection from 1-600 seconds, set in 1 second
increments
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Continuous Collection with manual start and stop
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Built-in speaker provides audible alert to completion
of charge collection and other operations or system events
Measure with Confidence
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Ready in less than 2 minutes after power on; The
SuperMAX has been designed to minimize warm up time and make a
stable, repeatable measurement whenever called upon
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Designed to exceed AAPM, ADCL, and reference grade
instrument specifications
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Reference class electrometer according to IEC 60731
Powerful Data Management
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Store up to 100 different chamber/system factors in
the
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built-in chamber library, each with unique
calibration
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Measurement data can be exported to .csv format as
easily as saving a word processing document. The included USB flash
drive can be used to transfer measurement data to a PC for further
analysis.
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Create a database of sources and calculate projected
source strength with the Check Source Utility
Superior Flexibility
Applications
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External Beam IMRT
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LDR or HDR Brachytherapy
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Two channel operations such as cross calibration
between two chambers, isocenter versus off-axis, and in-air versus
in-water comparisons
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Any task where a high quality reference grade
electrometer is required
Click here for a detailed pdf brochure outlining the
Max 4000 Electrometer
Please click here for a comparison of the specifications of the available electrometers.
For a pictorial listing of available Cable Connectors, please click here
The Max 4000 Electrometer,
SeeDOS Code 90015
and the MAX 4001 Electrometer, SeeDOS Code 90013
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Now includes MAX COMM Communication and Library Software! Click Here |
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The
MAX 4000 Electrometer (SeeDOS Code 90015)
is a superior instrument for accurate measurement of an extremely wide range of all brachytherapy sources, low dose rate, high dose rate, and cardiovascular. It is versatile enough to be used for all external beam and diagnostic x-ray applications.
MAX COMM software is now shipping with every MAX-4000 or MAX-4001 Electrometer!
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Intuitive Interface |
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Easily Portable | |
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Large Comprehensive Display |
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Excellent Sensitivity |
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The amp, coulomb, and collection time can be displayed simultaneously, minimizing the need to switch screens.
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Digital Filter |
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Easy to Use | |
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The user interface is intuitive, simple and straightforward to use so you can do your work quickly.
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A few buttons control all operations.
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User activated automatic zeroing: press a button and you are ready to measure!
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Large, easy to read LCD display: visible from a distance and in low light.
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Brachytherapy
Exceptional sensitivity and a wide dynamic range makes MAX 4000 the electrometer of choice for all brachytherapy measurements. It provides immediate measurements of even the lowest activity isotopes. For example, a 0.27mCi iodine seed, measured in the HDR 1000 Plus Well Chamber, gives a signal of 1.458pA. It can also measure 10Ci and higher iridium
sources. |
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External Beam Radiation Therapy
The MAX 4000 works exceptionally well with all ion chambers typically used for data acquisition in water phantoms, and with all chambers used for quality assurance tests e.g. IMRT. |
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Diagnostic Radiology
The versatile MAX 4000 is ideally suited for all mammographic, conventional radiology, and CT scanning applications. |
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Max 4000 Electrometer SPECIFICATIONS
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Four modes:
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Rate, Charge, Timing, and combined Rate and Charge
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Zero Drift:
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< 5fA
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Low Range: 0.001 pA - 1999.9 pA, 1 fA resolution
High Range: 0.001nA - 195.00 nA, 1 pA resolution |
Display:
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LCD, 2 x 20 with 3/16" high letters for easy viewing
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Input:
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BNC two lug, triaxial connector
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Bias Voltage:
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Nominal ± 300 volt bias | |
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Low Range: 0.01 pC - 999,999 nC, 10 fC resolution
HIgh Range: 0.01 nC - 999,999 nC, 10 pC resolution |
Five user settings: |
-300, -150, 0, 150, 300 (VDC) | |
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Selectable time periods for charge collection
Range: 0-600 seconds
Increments: 15 seconds
Resolution: 1 second
Other mode: "free running" |
Accuracy:
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± 0.3 volt
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The accumulated charge and the current readings are displayed simultaneously.
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Power:
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UL listed wall-mounted power supply, 110 or 220 VAC input, 9VDC@300 mA output Internal battery: 10 hrs/charge
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Range Switching:
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User selectable: High or Low
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Zeroing:
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Automatic zero function, user activated
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Repeatability:
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Short term, ± 0.1% ± 1 count
Long term, ± 0.2% (maximum change over two years)
Signal setting time (typ)
signal < 2 nA - 12 seconds
signal > 2 nA - 3 seconds
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Output:
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Isolated RS-232, Bi-directional, 19,200 baud rate, 8 data bits, no parity, 1 stop bit
RS-232 Command Set (PDF) | |
Linearity:
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± 0.06% typical for all rate and charge settings
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Dimensions:
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Height: 2.75 inches, 7 cm
Length: 9 inches, 23 cm
Width: 8.24 inches, 22.2 cm
Weight: 3.0 lbs., 1.4 kg
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Specifications subject to change without notice.
The MAX 4001 Electrometer is a superior instrument for accurate measurement of an extremely wide range of all brachytherapy sources, low dose rate, high dose rate, and cardiovascular. It is versatile enough to be used for all external beam and diagnostic x-ray applications.
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Now includes MAX COMM Communication and Library Software! Click Here |
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| Compatible with the TRS-398 Protocol |
- The accuracy and dependability of our popular MAX 4000 Electrometer, but with a 1/3 bias ratio (-300, -100, 0, 100, 300 VDC)
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| Intuitive Interface |
- Easy to use, no complicated set up required
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| Large Comprehensive Display |
- The amp, coulomb, and collection time can be displayed simultaneously, minimizing the need to switch screens.
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| Digital Filter |
- A digital filter built into the MAX 4001 eliminates the effect of noise.
- This results in a very stable and exact measurement.
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| Easily Portable |
- Lightweight with a small footprint
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| Excellent Sensitivity |
- 0.001 pA to 195.00 nA range
- 0.01 pC to 999,999 nC range
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| Easy to Use |
- The user interface is intuitive, simple and straightforward to use so you can do your work quickly.
- A few buttons control all operations.
- User activated automatic zeroing: press a button and you are ready to measure!
- Large, easy to read LCD display: visible from a distance and in low light.
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Brachytherapy
Exceptional sensitivity and a wide dynamic range makes MAX 4001 the electrometer of choice for all brachytherapy measurements. It provides immediate measurements of even the lowest activity isotopes. For example, a 0.27mCi iodine seed, measured in the HDR 1000 Plus Well Chamber, gives a signal of 1.458pA. It can also measure 10Ci and higher iridium sources.
External Beam Radiation Therapy
The MAX 4001 works exceptionally well with all ion chambers typically used for data acquisition in water phantoms, and with all chambers used for quality assurance tests.
Diagnostic Radiology
The versatile MAX 4001 is ideally suited for all mammographic, conventional radiology, and CT scanning applications.
SPECIFICATIONS
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Four modes: |
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Rate, Charge, Timing, and combined Rate and Charge |
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Rate: |
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Low Range: 0.001 pA - 950.00 pA, 1 fA resolution
High Range: 0.001 nA - 195.00 nA, 1 pA resolution |
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Charge: |
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Low Range: 0.01 pC - 999,999 nC, 10 fC resolution
HIgh Range: 0.01 nC - 999,999 nC, 10 pC resolution |
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Timing: |
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Selectable time periods for charge collection
Range: 0-600 seconds
Increments: 15 seconds
Resolution: 1 second
Other mode: "free running"
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Combined: |
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The accumulated charge and the current readings are displayed simultaneously. |
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Range Switching: |
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User selectable: High or Low |
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Repeatability: |
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Short term, ± 0.1% ± 1 count
Long term, ± 0.2% (maximum change over two years)
Signal setting time (typ)
signal < 2 nA - 12 seconds
signal > 2 nA - 3 seconds |
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Linearity: |
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± 0.06% typical for all rate and charge settings |
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Zero Drift: |
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< 1 fA @STP |
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Display: |
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LCD, 2 x 20 with 3/16" high letters for easy viewing |
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Input: |
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BNC two lug, triaxial connector |
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Bias Voltage: |
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Nominal ± 300 volt bias |
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Five user settings: |
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-300, -100, 0, 100, 300 (VDC) |
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Accuracy: |
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± 0.3 volt |
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Power: |
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UL listed wall-mounted power supply, 110 or 220 VAC input, 9VDC@300 mA output Internal battery: 10 hrs/charge |
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Zeroing: |
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Automatic zero function, user activated |
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Output: |
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Isolated RS-232, Bi-directional, 19,200 baud rate, 8 data bits, no parity, 1 stop bit
RS-232 Command Set (PDF) |
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Dimensions: |
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Height: 2.75 inches, 7 cm
Length: 9 inches, 23 cm
Width: 8.24 inches, 22.2 cm
Weight: 3.0 lbs., 1.4 kg |
Click here for a detailed pdf brochure outlining the
Premier 3000 Electrometer
Click here to go to CDX2000B Electrometer details
Click here for a detailed pdf brochure containing a
comparison of the three electrometers
Click here for a detailed pdf brochure containing the complete
ion chamber/electrometer/insert calibration system
NEW (End of January 2003) New pdf brochure - CDX2000B ExCALIBur Electrometer
NEW (February 2003) New Brachytherapy source measuring and handling systems pdf  Use this button to obtain your free Acrobat Reader (pdf reader)
Uni-directional and Bi-directional Max 4000 Interface to PC You have two options of taking full advantage of the RS-232 port of the Max 4000 Electrometer :
OPTION 1 UNI-DIRECTIONAL INTERFACE The Max 4000 outputs the exact same information that you can see on the display in real time... in other words what you see on the display will be output to the RS-232 port. This information is output in plain old ASCII text so you can use any terminal program to capture
the data. If you are running a PC with Win 9X there is a program called HYPER-TERMINAL that will do this for you. You can find it here : START>PROGRAMS>ACCESSORIES>COMMUNICATIONS>HYPER-TERMINAL. With HYPER-TERMINAL the text can be captured as a .txt file, saved, then opened with EXCEL. You can format the data to your requirements
from there.
OPTION 2 BI-DIRECTIONAL INTERFACE The Max-4000 now has firmware available (on new models and as an upgrade) that will allow you to not only capture data but to also remotely control the unit from your PC. The Max 4000 has a "command set" that is fairly simple and easy to use. These commands provide for
controlling the Max 4000 from a remote PC as if you were actually pressing the buttons on the front panel interface. There are commands that emulate each of the front panel buttons, plus commands that will provide status information. If you can write scripts using programming languages,
such as VISUAL BASIC, this command set can be used to customize your data collection ability. This interface can even be controlled with the same HYPER-TERMINAL program with minor limitations.
RS-232 Command Set (PDF) Please click here for a detailed pdf of the latest Prostate Brachytherapy Brochure outlining the Seed Handling, Activity Measurement and Needle Loading Equipment
For a pictorial listing of available Cable Connectors, please click here
MAX COMM SOFTWARE (new January 2004)
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REF 75501
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 User Manual
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Current Version 1.6
| MAX COMM software is now shipping with every MAX-4000 or MAX-4001 Electrometer! MAX COMM software is designed to give
advanced control and configuration options
to the MAX-4000 or MAX-4001 Electrometer by enabling the user to specify and save multiple hardware configurations when taking measurements and working with those results. Operating with this program requires a MAX-4000 with firmware version 4.4 or higher or MAX-4001 with firmware version 1.0 or higher. Take advantage of the communication components in both library and
measurement modes, and upgrade your MAX today!
Features
- Utilize a library of stored calibration factors
- Step through calculations automatically
- Calculate temperature and pressure corrections
- Control the electrometer remotely
- Retrieve raw measurements from the MAX-4000 or MAX-4001
- Export data in Excel® readable format
To ensure your electrometer is compatible with the MAX COMM software, please contact SeeDOS for more information on how to upgrade the firmware in your system to the latest version.
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See screenshots below |
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SYSTEM REQUIREMENTS
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Electrometer |
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MAX-4000 with firmware version 4.4 or higher, or MAX-4001 with firmware version 1.0 or higher. |
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Connection |
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Serial Port |
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Processor |
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Intel-compatible Pentium 90 or higher |
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Memory |
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32MB of RAM |
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Hard Disk Space |
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Minimum of 30 MB available |
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Operation System |
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Win9x, Windows 2000, Windows XP |
 Use this button to obtain your free Acrobat Reader (pdf reader)
If you are interested in any of the products mentioned here, please complete a Quotation Request Form or an
Enquiry Form so that we may promptly respond to your detailed request. |
TOP OF PAGE
Please contact Colin Walters at cwalters@seedos.com if you would like further information or you have questions
or comments about this web site.
SeeDOS Ltd, 26, The Maltings, Leighton Buzzard, Bedfordshire LU7 4BS, United Kingdom
Tel: +44 1525 850 670 • Fax: +44 1525 850 685
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