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Portable Neutron Survey Meter

Victoreen® Model 190N

 

Model 190N shown with Model 190 Readout
and Model RP-N Detector Assembly

 
 

  • Wider (lower & higher) rate range
     

  • Improved operator interface
     

  • Useful for area monitoring and surveys
     

    •

  • Adjustable shoulder strap and padded grip
     

  • True Rem readings
     

  • Available in SI units

 
Introduction

The Victoreen Model 190N Portable Neutron Survey Meter is designed to measure mRem in accordance with the classical Anderson and Braun design. The neutron probe can be attached to either a Model 190 Survey Meter or a Model 190F Frisker for continuous area monitoring. It is truly portable and is ergonomically designed for ease of carrying with a shoulder strap.

This product has all the salient features of an intelligent digital survey meter including data logging. Using the Model 190-lA Infrared Communicator, manual data logging or automatic preset time data logging is accessible for data handling. The instantaneous rate and continual integration of dose and time can be logged. Refer to the Model 190 Survey Meter data sheet for a complete listing of all salient features.

Applications

The Model 190N can be used for neutron surveys and area monitoring. The unit is self-contained and does not need to be connected to any other system or product to operate.

Features

  • The Model 190 display:
    - Direct reading digital display
    - Simulated analog scale with auto ranging
    - Rate display mode
    - Integrate display mode: dose
      accumulation and time accumulation
     

  • Programmable in English or SI units

  • Data logging with the Model 190-1A Infrared Communicator to a personal computer

  • Portable:
    - Adjustable shoulder strap
    - Rugged handle with padded grip
    - Smaller overall dimensions than previous designs

  • Flexible detector assembly, Model 190 can be removed for remote readings
     

  • Neutron Probe, Model RP-N, can be interfaced to the Model 190F Frisker, with AC power for continuous monitoring

Specifications
 

Readout  Programmable features of a standard Model 190 Survey Meter. Refer to the Model 190 data sheet for complete details

Alarm  Audio and visual setpoint can be programmed into the Model 190N via the Model 190-1A Infrared Communicator

Logging of data  The 190-1A Infrared Communicator interfaced to a personal computer can be used to set up data logging

Detector assembly, Model RP-N The detector assembly is a polyethylene cylinder, 9.5 inches long by 8.5 inches in diameter, containing a BF3 proportional counter and neutron energy compensating materials. It is based upon the standard reliable Anderson and Braun design for neutron energy response. The handle is padded for ease of gripping. An adjustable shoulder strap is provided

BF3 operating characteristics The BF3 proportional counter operates at 1150 V. Active length is 2 inches (5.08 cm). Fill gas is enriched BF3, 96% Boron 10. Gas pressure is 20 cm Hg. Resolving time is 1 microsecond, plateau slope is 2% per 100 V and tube life expectancy is greater than 1010 counts

Typical energy dependence

 

Typical neutron sensitivity Nominal 2000 counts per mRem

Range

Rate 0 μRem/h to 75 Rem/h

0 μSv/R to 0.75 Sv/h

0 CPM to 2.5 x 106 CPM

0 CPS to 41,660 CPS

Integrate 0 μRem to 1000 Rem

0 μSv to 10 Sv

0 to 109 counts

Gamma sensitivity/rejection No response in 137Cs gamma radiation in fields up to 500 R/h

Accuracy 10% of theoretical ICRP dose rate

Dimensions 12.50 Ø x 10.25 in (d) (31.75 x 26 cm)

Flexibility The Model 190 is detachable from the detector assembly for remote readings. The Model 190 can be held or can be mounted on either side of the cylinder for convenient carrying

Miscellaneous Detector assembly cable length: 4.5 ft (1.37 m). An optional 30 ft (9.14 m) cable is available

Weight 21 lb (9.52 kg) (total Model 190 + detector assembly)

Directionality Less than 20% in three orthogonal directions

Temperature range The Model 190’s operating range is 14º to 104ºF (- 10° to + 40°C). The detector assembly operating range is -112º to 176ºF (- 80° to + 80°C)

Power requirements Four 9 V alkaline batteries supplied, 100 hours operation

Calibration The Model 190N is calibrated against a NIST traceable “Tissue Equivalent Proportional Counter” and uses Radium/ Beryllium neutrons at a distance of 100 cm

Available model(s)

190N Portable Neutron Survey Meter
190N-SI Portable Neutron Survey Meter, SI Unit

Tested. Meets applicable standards.

 

     Supertech ®
  President: David B. McNitt
  V.P. of Marketing: Judy McNitt-Mell
  Asst. to the President: Joy E. Nystrand

  Address:
  P.O. Box 186
  Elkhart, IN 46515 USA

  Sales: 800-654-1054
  Phone: 574-264-4310
  Fax: 574-264-9551


Email: sales@supertechx-ray.com
Support: support@supertechx-ray.com