Fluke 451 B

Fluke 451 B

Ion Chamber Survey Meter with Beta Slide

Fluke 451B Ion Chamber Survey Meter with Beta Slide

The 451B state of the art ion chamber survey meter is a hand held battery operated unit designed for use in both rugged and normal environments. The 451B includes a sliding beta shield, to serve as an equilibrium thickness for photon measurements and enables beta discrimination. The 451B has auto-ranging and measures the radiation rate and accumulated dose from various radiation sources (beta, x-ray and gamma). The ion chamber detector allows for a fast response time to radiation from leakagem scatter beams and pinholes. Additionally, the low noise chamber bias supply provides for fast background settling time.

The digital display features an analog bar graph, 2.5 digital readout, low battery, freeze (peak hold) mode indicators and an automatic backlight function. User controls consist of an ON/OFF button and a MODE button. The case is constructed of lightweight, high strength materials and is sealed against moisture.

The RS232 interface can be connected directly to a computer for use with the Excel add-in for Windowa (451EXL), enhancing the functionality of the instrument. This software allows for data retrieval, user parameter selection and provides a virtual instrument display with audible (requires sound card) and visual alarm indication.

Key Features:

  • Measures skin dose (slide open) and deep dose (slide closed), for alpha and beta discrimination
  • Low noise chamber bias supply for fast background settling time
  • Easy touch keys
  • Ideal for a wide range of applications including NDT, X-ray and environmental applications too.
  • Programmable flashing display and audible alarm
  • Automatic, ultra bright LCD display
  • High Sensitivity measurements of rate and dose simultaneously, with the capability to record peak rate
  • Auto-ranging and auto-zeroing
  • RS-232 communications interface with optional Windows-based Excel add-in for data logging
  • Fast response to measure radiation from leakage and scatter beams
  • Ergonomic, anti-fatigue handle with replaceable grip, wrist strap and tripod mount, for stationary area monitor applications.
  • Easily-accessible battery door (operated by two 9Volt alkaline batteries) on the outside of the bottom case
  • Available with dose equivalent energy response (SI units)
  • Downloading of 2700 data sets stored in instrument
  • Virtual instrument display with audible and visual alarm indication
  • Supports user instrument configuration and parameter selection
  • User selectable modes

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