Home Enquiry Form Quotation Request Forms Brochure Request Form What's New Product Lists Product User Manuals Product Technical Notes Ultrasound Equipment Ultrasound Transducers Pre-Plugged Seed Needles Seeding/Biopsy Steppers Disposable Grids Disposable Drapes Endocavity Balloons Grid Adapters PAL Pro Stirrups OR Tables / Trolleys Source Measurement Electrometers Equipment Services Suggestions FAQ Search Useful Web Sites Training Courses Calibrations and Upgrades Intravascular Brachy LDR Calibrations Prostate Brachytherapy Prostate Biopsy 3D Prostate Mapping Prostate Cancer Prostate Seed Implant Mammography/Diagnostics Site Map External Beam/IMRT/CT Exradin Ion Chambers Prostate Scanning SeeDs and Strands Seed Implant Dosimetry HDR/PDR Dose Planning HDR MultiSource HDR Gynae Applicators HDR Gynae Template LDR/MDR Curietron HDR IU Sleeves HDR/IORT HAM Applicators HDR/IORT Breast Applicator HDR Prostate Brachy HDR Prostate Template AUTIMO Beam Systems Alloys and Alloy Melters Slideshow Bibliography Our Company Curietron Appeal Iridium-192 Wire Sources Eye Applicators Gold Fiduciary Markers Urology Biopsy Biopsy Guns/Needles Needles/Guns/Applications Clinical Oncology Needles Haematology Biopsy Interventional Radiology Urology Needles/Guns Breast Biopsy/Localisation Gynae Biopsy / Aspiration Skin Biopsy Punch Anaesthesia Needles Antenatal Diagnostic Needle Guides Syringe Holders Biopsy Grids Biopsy Steppers Infection Control-MultiMAT Bone Marrow Biopsy Vertebroplasty Laparoscopy Needles Laparoscopy Support Temno Adjustable Coaxial MRI Biopsy/Localisation Percutaneous Injection-PIA Portable Bladder Scanner Cryotherapy Brachytherapy Template Guided Biopsy Volume Studies Fiducial Marker Placement Micro-Touch Micro-Touch LP NEW EX3 Stepper Classic Stepper Multi-Purpose Workstation Stabilizers Steppers Brachy/Biopsy Accessories
 
 Water Calibration System
Home
Up
Computer Control Phantom
Water Calibration System
Geocheck Phantom
QC3 Phantom
PIPSpro Introduction
 


 




 
 

 

 

 

 

 

 

Water Calibration Systems  (TRS398/TG51)

High Energy Photon and Electron Beam Dosimetry

For the New Complete Water Calibration Systems (TRS 398) PDF Brochure, please click here

Please click here for the TRS 398 protocol which describes the absorbed dose to water measurements standards and practice to use when calibrating a linear accelerator using a 1D (or 2D) dimensional water tank, ion chamber and electrometer. The TRS 398 protocol is written through the international governing body, IAEA (International Atomic Energy Agency).TRS398 is now the international standard for absorbed dose to water and replaces TRS 277 ( measurements in air ). Many centres are making the switch from air kerma based measurements to absorbed dose to water measurements to get as close to mimicking patients as possible. There is now a move by the international SSDL's ( Secondary Standards Dosimetry Laboratories ) set up by the IAEA and the U.S. based ADCL's ( Accredited Dosimetry Calibration Laboratories ) to,  over the next few years, only providing absorbed dose to water calibrations ( TRS 398 and TG 51 ) and remove Air Kerma calibrations (TRS 277 and TG 21). This move will save centres more time than doing the old Air Kerma measurements.

Complete Calibration System

Close up of motor drive and Exradin A12 Farmer Chamber

   

Water Tank

  • 0.1mm precision depth positioning
     
  • Convenient drain valve
     
  • 25cm depth positioning assembly
     
  • Sturdy Acrylic handles, portable and easy to use
     

Exradin A12 Waterproof Farmer Chamber

  • Fully Waterproof, Fully Guarded
     
  • Collector, guard, outer electrode made of Shonka™ conductive plastic
     
  • Calibrations available from University of Wisconsin ADCL for both Water and Air
     

Remote Motor Drive

  • Control detector depth of your water tank from outside the room saving you time and effort
     
  • 6 digit Digital Readout and Zero Re-Set button
     
  • 0.1mm positioning accuracy also allows continuous run and intermittent jog to establish reference position
     
  • Easy Installation

     
 FREE TG51 Lead Foil with purchase of Exradin A12 or CDX 2000B.

CDX 2000B Electrometer
 

  • Versatile Primary Electrometer excellent for use with all standard farmer chamber and parallel plate chambers used in absolute dosimetry as well as all radiation therapy and brachytherapy measurements
     
  • 2 row x 20 column LCD display
     
  • Amp and Coulomb scale with unique timing feature
     
  • Battery operated, lightweight & portable
     
  • Automatic zeroing
     
  • Isolated RS-232 interface
     



EXCALIBUR CDX 2000B, The lowest priced general purpose electrometer to include an Amp scale, a Coulomb scale, and a unique timing feature.
 

   

1mm Lead Foil
 

  • Used for absorbing Electrons
     
  • Easily slides inside wedge tray or tape to collimator
     
  • 20cm x 20cm x 1mm; 10cm x 10cm grid
     
  • Protective coating provides strength so lead is rigid
     

1mm Lead Foil

CDX 2000B Electrometer Specifications
Exradin A12 Farmer Chamber Specifications
Sensitivity 0.01nC count
Charge Range - 0.01 to 999,999 nC
Rate Range - 0.01 to 200.00 nA
Deviation from Linearity

0 to 100 nA
101 to 150 nA

 		 

None
<0.5%

Precision 0.02% reproducibility
Leakage <1x10-15 A
Voltage Nominal ±300 V bais, dual polarity and half voltage
Display Alpha Numeric 2 Row by 20 Column LCD
Input BNC triaxial connector
Output RS232 port
Power Rechargeable battery with UL listed battery charger
Colleting Volume 0.651 cm3
Centroid of Collecting Volume 12.9mm from tip of chamber
Collector Diameter 1.0mm
Outside Diameter Sensitive Region 7.1mm
Wall Thickness 0.5mm
Wall, Collector, and Guard Material Shonka™ air-equivalent plastic C552
Maximum Polarizing Potential Greater than 1000V
Inherent Leakage Currents Less than 10-15 Amperes

Water Phantom for TG51 with Depth Positioning Assembly, SeeDOS Code WP3840

The Model WP-3840 is a water Phantom with a convenient manual ion chamber depth positioning assembly. The water tank is constructed of 3/8" acrylic and provided with side mounted handles, a drain and a ball valve. The outstanding feature is the depth positioning assembly that is unique in construction and operation. The ion chamber holder Teflon block slides on two stainless steel rods and is driven by a brass lead screw. One turn of the hand crank quickly and accurately moves the chamber holder block 1mm. A mechanical counter with push-button reset capability indicates depth to the nearest 0.1mm.

The horizontal off-centre positioning is achieved by sliding the depth positioning assembly along the edge of the water tank to the desired position as indicated on the horizontal scale mounted on the side of the tank. The depth positioning assembly may be easily retro-fitted with an the Model RMD-100-5 Remote Motor Drive that allows chamber depth positioning from a remote location. The depth is indicated by a digital LCD display with push-button zeroing, adding convenience and significant time saving to your monthly routine.

Specification Model WP-3840
 
  • Tank Dimensions: 38 cm wide x 40 cm long x 38 cm high
     
  • Materials: sides-3/8" clear acrylic, Bottom-3/8" white acrylic
     
  • Drain Valve: ball type, PVC with Teflon seats and 1/2" PVC barbed nipple
     
  • Weight : 7.5 kg(16.5 lbs) empty, Approx. 65 kg(142lbs) filled
     
Depth Positioning Assembly
  • Travel: 25 cm vertical
     
  • Counter: mechanical, 5-digit, 0.1 mm precision
     
  • Chamber holder: cylindrical chamber holder accommodates Diameters from 3 mm to 20 mm
     
  • Parallel plate ion chamber holders are available as an option
     
  • Materials: clear acrylic, stainless steel, brass, Teflon
     
  • Weight: 1.8 kg (4 lbs)

Model RMD-100-5 Remote Motor Drive, SeeDOS Code RMD1005

With the Model RMD-100-5 Remote Motor Drive it is now possible to convert the manual crank mechanism of the WP-3840 depth positioning assembly to allow ion chamber positioning from outside of the treatment room, adding convenience and significant time saving to your monthly routine.

Installation is easy, since it makes use of existing threaded holes for mounting the motor drive assembly to the depth positioning assembly. Although the installation includes adding two drive sprockets, the hand crank is reinstalled on the motor shaft, thereby retaining the original manual positioning and mechanical counter readout functions.

The control/display module is connected to the drive motor by a 15-meter cable for complete control of chamber depth from the accelerator console. Its six-digit liquid crystal display indicates the depth position in units of centimetres to 0.001cm. The RUN switch operates the motor drive in a continuous mode, while the JOG switch provides intermittent operation. Both switches control the motor drive in up/down directions, indicated on display as + and – respectively.

Specifications Model RMD-100-5
 
  • Display: 6-digit liquid crystal display with +/- indicators corresponding to up/down, and decimal point
     
  • Accuracy: depth displayed to 0.001cm (depth measured to 0.005cm)
     
  • Controls: bi-directional continuous (RUN) and intermittent (JOG), display reset switch to establish reference position, on/off switch
     
  • Cable: controller to motor: 15m (50ft), PVC-jacketed, multi-conductor cable
     
  • Power: 120/240 VAC, 50/60Hz
     
  • Dimensions: 19.7 cm x 15.2 cm x 7m, (7.75 in x 6 in x 2.75 in)
     
  • Weight: 3 kg(6.6 kg) including controller, motor & mounting assembly, and cable
     
  • Motor: 12VDC, reversible, variable speed, 160 rpm @ 12VDC
     

For an Electrometer for use with your Exradin Ion Chamber please click here

Click here for New Virtual Water PDF Brochure

 

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