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Hi Range Survey Meter

Stable, essentially drift-free electrometer technology

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Whenever a fast, sensitive ion chamber instrument is needed, the TBM-IC-MARK V is the latest in a series. The TBM-IC-MARK V ion chambers are now smaller and lighter. Based on newest more stable, essentially drift-free electrometer technology.

The TBM-IC-MARK V consists of a 2.5″ dia x 3.5″ long air ion chamber coupled to a stable solid state MOSFET input electrometer with built in A to D converter to read out directly in mR/h or mR. Rate range is 0.1 mR/h to 9.999 R/h in a single range. Dose range is 0.01mR – 99.9R in a single range. 180 mg/cm graphite lined methacrylate walls accurate “air equivalence.” Thin (0.5 mg/cm ) Mylar window allows high sensitivity readings for alpha and for low energy beta such as C14 in addition to higher energy Betas, Gammas and X-rays.

Item Numbers
5250-0141 Hi Range Survey Meter

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  • Digital Readout: 8 digit-rate, 8 digits integrate
  • Dose Rate & Total Dose Read Out
  • Small Lightweight 26 oz.
  • TBM Package
  • Flat Response – Free Air Ion Chamber
  • See Axially Below 5 KEV Gamma or X-Ray
  • Sees Alpha, Beta, Gamma, X-Ray
  • Fast Response
  • Wide Range: 0.1 mR/hr to 9.999 R/hr

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  • Detector: Free Air ion chamber 2.5” dia x 3.5” long. Internal volume 260 cc
  • Wall & Cap: Methacrylate, graphite lined 180 mg/cm walls and 540 mg/cm cap.
  • Window: 2.0” dia. x 0.5 mg/cm Mylar.
  • Readout: LCD 8 digits.
  • Indicator Lamp: Green LED 10 pulses/sec per mR/h
  • Red Over-range Indicator
  • Range: Rate 8 digit 0.1 mR/h to 9.999 R/h in a single range.
  • Integrate 8 digits 0.01 mR to 99.9R in a single range.
  • Electrometer: Solid State MOSFET input.
  • Electronics: A-D converter LCD drivers.
  • Batteries: 10 ea. (Button) NEDA CR-1220 – shelf life 7 years.
  • 6 ea. (AA) NEDA 15A – 1000hr.
  • Dimensions: 5-1/2” x 3-1/2” x 8” including handle.
  • Weight: 26 oz. complete with batteries.
  • Options: Readout in Si units: Sv and Sv/h.

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