SuperMAX Electrometer

The premier two-channel, reference-grade electrometer on the market.

The Next Generation Electrometer

Built on the MAX 4000's legacy of highly accurate, reference grade measurements, combined with a revolutionary touchscreen interface and a host of advanced measurement features, the SuperMAX redefines what an electrometer should be.

Features & Benefits

Two Independent Measurement Channels

  • 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 variety of applications, including ratio measurements.

Built-In Detector Library

  • Eliminates the need for a PC or to apply system factor and temperature/pressure corrections.
  • Store over 100 detectors and calibrations.
  • Apply individual factors to one or both measurement channels.
SuperMAX Electrometer - large color display

Easy-to-Use Interface

  • Large, color display with built-in touchscreen.
  • On-screen keypad and pull down menus allows for easy access to settings and detector library.

Store Data Collection

  • Measurements are stored from all data collection.
  • Set automatic repeat measurements.

Exradin W1 Scintillator Integration

Two dedicated modes in the SuperMAX allow for seamless calculations using the Exradin W1 Scintillator.

SuperMAX with Exradin W1 Scintillator


SuperMAX Electrometer
REF Number 90018
Height 8.1 cm (3.2 in)
Width 26.7 cm (10.5 in)
Length 21.1 cm (8.3 in)
Weight 2.41 kg (5.31 lbs)
Display Range RATE:
Low Range 0.001 pA – 500.0 pA, 1 fA resolution
High Range 0.001 nA – 500.0 nA, 1 pA resolution

Low Range 0.001 pC – 999.9 μC, 1 fC resolution
High Range 0.001 nC – 999.9 μC, 1 pC resolution
Charge Collections TRIGGER:
Automatic start, stop, reset and save data based on user defined thresholds (Start: 0.2 – 9.9 pA; Stop: 0.1 – 9.8 pA)

User set duration (Range: 0 – 600 seconds;
Increment: 1 second)

Unlimited duration with manual stop
Real Time Clock Date and time stamp for all measurements for easy identification
Internal Memory Store preferences, >100 sources, >100 chamber/system factors
Range Switching User selectable — High or Low
Repeatability ± 0.1% (IEC 60731 requirement: ± 0.5%)
Long-Term Stability 0.5% (over one year)
Stabilization Time ± 0.1% (IEC 60731 requirement: ± 0.5% of value at 1 hr for measurements taken at 15 min and 6 hrs)
Response Time < 3 s on high range (IEC 60731 requirement: < 3 s)
Non-Linearity ± 0.25% (IEC 60731 requirement: ± 1.0%)
Conformity CE 93/42/EEC
Reference class according to IEC 60731
Zero Drift ± 0.25% (IEC 60731 requirement: ± 0.5%)
Zero Shift ± 0.25% (IEC 60731 requirement: ± 0.5%)
Display 6.4" color TFT, touchscreen
Input (2) BNC two lug, triaxial connector
Bias Voltage Nominal ± 1000 volt bias

– 1000 to – 100, 0; 100 to 1000 (set in 1 volt increments)

± 0.3 volt
Power 100-240 VAC, 0.5 A max, 50/60 Hz input to external power supply, 9 VDC, 1.7 A power supply output to electrometer input, UL/TUL listed power supply
Zeroing Automatic zero function, user activated
Output (2) USB ports, Isolated RS-232; bidirectional 19,200 baud rate; 8 data bits; no parity; 1 stop bit;
Options SuperMAX Accessory Kit (REF 72245)
Includes extra stylus, extra USB flash drive, and set of 5 extra screen protectors

"The SuperMAX is a great electrometer. It's interactive screen is big and easy to see and use. It's small footprint makes it possible to set-up on even the most crowded work surface. Most importantly, it is fast to warm up, precise and very reliable. I particularly like the fact that the SuperMAX will store calibration factors for all of my chambers, as well as all my readings from our evening of data collecting. The SuperMAX is a great piece of gear."

David J. Masisco, MS Medical Physicist Community Hospital of the Monterey Peninsula

"I was cross-calibrating one of the thimble ion chambers and the SuperMax electrometer that we purchased from you with a live cobalt source. I was at PMH and the physics associate who was working with me was amazed at the stability of the chamber and the ease of use of the electrometer. I had never done such a calibration before, and I must say working with both products was fantastic!"

Hussein Ganijee Physics Associate Southlake Regional Cancer Center


SuperMAX Electrometer - Applying System Factors

0.45 min


Product Resources

Publications, tech notes, testimonials, and other resources to support SuperMAX Electrometer.

Looking for a user manual?

Available on request. Contact your Account Manager


View publications related to this product from experts in the fields of medical physics and oncology.

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Tech Notes

Find detailed instructions on how to setup and execute common processes from our experienced technicians.

Go to Tech Notes »

Frequently Asked Questions

How often should I send my electrometer in for calibration?

The IEC (International Electrotechnical Commission) recommends electrometer calibration every two years to assure optimal performance.

  • IEC 60731 – Medical electrical equipment – Dosimeters with ion chambers such as used in radiotherapy.
  • IEC 61674 – Medical electrical equipment – Dosimeters with ion chambers and/or semi-conductor detectors as used in X-ray diagnostic imaging.

Standard Imaging can coordinate your calibration at an accredited ADCL, but also provides free inspection and testing services, as well as expedited repair service, if necessary. Our goal is a two-week turnaround upon receipt of equipment, although actual time may vary depending on the ADCL. Request Service »

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