GiCi is accredited to ISO 17025 by ACLASS.

View our Certification and Scope.

Don’t Let a Surprise Audit Ruin Your Day; Calibrate Now! Over 28  Years and >20,000 Calibrations!

No one has serviced Dynalyzer™ longer or better than Greenwich Instrument Co. Inc. in Greenwich, CT.  We offer exceptionally fast turn arounds on your equipment calibration.

We have used, rebuilt Dynalyzer™ sets ready to go. We also have the GiCi 2000/Parker Medical H917 voltage divider, high voltage test cables, and Lorad Mammo test cables. 


The high voltage units have been mechanically upgraded with new Delrin plastic insulating parts. Virtually all old Dynalyzer™ need a rebuild to replace broken or nearly broken Lexan. We put time and money into our rebuilt equipment, which is much better than used. Dynalyzer™ and voltage dividers calibrated, serviced, and sold by the inventor of the Dynalyzer™, Dr. Jonathan S. Shapiro, PhD.

Please request an RMA number. write  call 1-800-998-4424

FREE USED HIGH VOLTAGE CABLE PAIR WITH HIGH VOLTAGE UNIT OR NEW CABLE PAIR WITH PURCHASE OF A   HVU and Display SET. Bes sure to ask for it, and refer to "web home page offer".



Gici 2000 Voltage Dividers, Parker Monopole Dividers
1.  New  GiCi 2000 ( H917)  Dividers, tested +/- 75KV.  +/-82.5 kv test on request. $2250.00 .  4 week delivery.

2.  New ParkerH1049-P1 Monopole divders, cal data to 150 KV, $4500, hi-pot tested to 165 KV,with extended Federal Std connector. with data only to 100 KV $3900. Also availabe with R28 HV connector. These are single dividers also available with 6 pin extendended federal std connectors for use with GE CT scanners.

Our Credentials

We are now ISO 17025:2005 accredited by ANAB . ISO 17025 incorporates most sections of ISO 9001, and is a rigorous examination of laboratory practices.

View our ISO 17025 Certificate

ISO 17025 Scope of Calibration

Differences between 17025 and 9001

We also calibrate MAS meters, scopes and DVMs. We sell used- rebuilt Dynalyzer™ to customers worldwide. We are buying used Dynalyzer™ IIIA high voltage units. We offer excellent used equipment built from what we buy . We replace all old Lexan internal components of the Dynalyzer high voltage unit with Delrin, which does not develop stress cracks. Stronger than new.

Dynalyzer IIIA  

No one has more experience with the Dynalyzer™ than Dr. Jon Shapiro, after all he invented it! We offer quick turn-around, 1 to 3 working days. Please call for Return Authorization number. Many repairs include improved parts so that we can make your unit stronger, and last longer. Find out more about Greenwich Instrument Co. Inc.  

Many of the structural changes in Dynalyzer™ materials were initiated by Greenwich Instrument Co. Inc. Lexan parts have been replaced by Delrin for many years. Others have adopted these changes. If your equipment is up to 33 years old, we recommend a mechanical rebuild as a preventive measure. There are 36 year old Dynalyzer™ still in use, and they all have the same accuracy, if they are maintained.  All our used Dynalyzer high voltage units are rebuilt.

GiCi 2000 Voltage Divider  

The HV-1 voltage divider has been discontinued. The GiCi 2000 replaces it and the GE bleeder. We recommend you use the GiCi 2000 which is an improvement over the old GE bleeder, and the HV-1. The new bleeder is compatible with the AMX-4 and the Lightspeed CT scanner. The GiCi 2000 is a frequency compensated version of the old GE bleeder, and has the same DC characteristics. It has a switch to provide 10,000:1 ratio direct to scope, or 1,000:1 ratio to 10 meg DVM orother
10 meg load.

Some of the Broken Dynalyzers We have Seen  

Unit on left has broken main divide rod due to a stress crack. It had wrong crumbly gasket. We rebuilt with Teflon Gasket.

Unit on right has new light pipe and new divider rod. We replaced all the nuts and couplings, too.

Rebuild your tank before it fails.

Installation of new internal parts||||
Voltage unit rebuild||||

Ask about our Dynalyzer™ high voltage unit rebuild program, it’s much more than a repair. It puts much new life into your HVU through the installation of new plastic internal parts: light pipe and couplings, center support, divider rod and check nuts. You can even have new high voltage connectors, if you want!

Our test procedures are most thorough. We check the actual KV and mA waveforms at the end of the procedure to double check that you will receive a working unit, and that there are no residual waveform issues. We can calibrate and repair all versions of the Dynalyzer™ high voltage unit
and display.

Why calibrate at all? Just read this paper from Agilent, the cost of calibration is small compared to the consequences.

GiCi TM Greenwich Instrument Co.  

Dynalyzer TM of Radcal Corp.

Answering Your Questions

If you have any questions about our products, please fill out the form below and send it to us. We will get back to you with a reply quickly.  

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