RS 700 (Mobile Radiation Monitoring System)

RS 700



RS-700 (Mobile Radiation Monitoring System)

For Vehicle, Airborne or Fixed Location Real-Time Search, Surveillance and Data Recording


Intended for use in land vehicles, helicopters, UAVs or at a fixed location, the RS-700 is a self-contained gamma ray and neutron radiation monitoring and detection system. The RS-700 utilizes advanced DSP / FPGA* technology and software techniques that provide laboratory levels of spectral performance that were previously unachievable on mobile platforms.

The system has a built-in GPS receiver, which enables it to accurately locate each measurement taken. It is also supplied with the RadAssist survey software program for user control, monitoring and recording. The system is flexible enough to permit real-time monitoring with a computer or operate in a stand-alone configuration with the data being recorded internally and later retrieved. Alternatively, the data can be transmitted to a remote monitoring location.

Transparent and automatic operation

The RS-700 with it's Advanced Digital Spectrometer (ADS) is a high resolution (1024 channel) gamma spectrometer that makes the measurement of both the naturally occurring and man made radioactive elements as transparent and automatic an operation as possible allowing the system to be operated by radiation non-specialists.

No test sources required for system stabilization

The RS-700 system uses multiple-peak gain stabilization on naturally occurring isotopes of U, K and Th.

Easy to use, operator friendly  

The RadAssist software provides a variety of monitoring displays indicating the radiation activity. A high level of self-diagnostics and performance verification routines are implemented with automatic notification of any error conditions. With the multiple data verification methods implemented, the user is assured of the quality and accuracy of the data.

Technical Specifications




Gamma Detector






4L NaI(Tl)

Differential nonlinearity

<0.2% over top 99.5%



0.4 NaI(Tl)

Integral nonlinearity

<0.01% over top 99.5%


Energy resolution


Zero dead time(1)




Baseline restoration

Digital (IPBR)(2)


Neutron Detector


Pulse shaping

Digital (AOPS)(3)


Tube Size

2" dia x 32" active length 3He

Pile-up rejection

Digital (<40nS)


Tube Pressure

2.7 atm (no transportation limits)

Pile-up contamination

<1% @ 250kcps



Medium moderated for optimum performance

Sample rate

 0.1-10 sec-1







RSX-1 & RSX-3x3

9-40 VDC, 6 W

Gain stabilization

Automatic multi-peak


RS-701 Console

15 W







RS-232 19200-115200 bit/s





USB memory stick



22.7 kg  (50 lb)





6.8 kg (15 lb)




RS-701 Console

6.8 kg (15 lb)

Composite spectrum



27 kg  (60 lb)

Individual spectra


Rooftop Carrier

9 kg (20 lb)

State of health













731 mm x 162 mm x 172 mm

Detector configuration



(26.80 in L x 6.4 in  W x 6.8 in H)

Operational parameters



381 mm x 101 mm x 101 mm

Trigger signal



(15 in  L x 4 in  W x 4 in H)

Calibration data


RS-701 Console

1,176 mm x 177 mm x 177 mm



(46.3 in L x 7 in W x 7in H)



233 mm x 112 mm  x 198 mm)



(9.2 in W x 4.4 in H x 7.8 in D)





Operating Temp.

-30°C to +45°C



  1. The RS-700 has no dead time in a traditional sense. A live time clock will be adjusted for loss of system measured pile-up rejections to give an apparent dead time to ensure the absolute count rate is correct.
  2. IPBR - Individual Pulse Baseline Restoration. The baseline is established for each individual pulse for maximum pulse height accuracy.
  3. AOPS - Automatic Optimized Pulse Shaping. Pulses are continuously analyzed and the signal pulse shaping adjusted for optimum performance
  4. Stated energy resolution is for new systems.  Refurbished system performance depends on quality of Xtals supplied.