Alpha Probe
Favorite this Product


Alpha Probe
Favorite this Product

The SA-20-2 probe for measurement of contamination is designed to be used with any CSP™ host device. It can be a handheld CSP instrument, a single PC with dedicated software or a networkable system.

Get More Info Data Sheet


  • Alpha surface contamination measurement
  • 20 cm2 detection area
  • Belongs to CSP family
  • Calibration via PC
  • Easy removable grid for decontamination
  • Compact probe and lightweight 


The SA-20-2 probe for measurement of contamination is designed to be used with any CSP host device. It can be a handheld CSP instrument, a single PC with dedicated software or a networkable system. The SA-20-2 probe connects to host device using either a specific cable or any of the CSP-COM modules to match the system conjuration (wired or wireless). Its 20 cm2 ZnS detection area makes it an ideal tool for counting alpha wipes, open wounds and filter papers.

The SA-20-2 probe is part of the Canberra™ SMART Probe (CSP) family. It includes all key components of hardware circuitry (high voltage power supply, amplier, discriminator, etc.). Also, the intelligence associated with controlling those components is located in the probe – that is control and storage of key parameters, settings, calibrations, probe ID, alarm settings (10 values for each unit to display with default setting), etc. Thus the probe is a fully integrated subsystem taking and transmitting the measurement to the instrument, which is used for display. With high voltage and digitization of the data occurring in the probe rather than the instrument, measurement quality is no longer dependent on external device quality (cable, host instrument). Moreover, a CSP probe is using a serial protocol to communicate with host, which can be an instrument or a PC. Calibration and QA measurements can be performed directly with the probe, without using an instrument, by connecting the probe to a computer with the Canberra Smart Probe Software (CSPS™), allowing your instruments to remain deployed in the field. Once calibrated, the SA-20-2 unit is ready to be used as a plug and play probe to start a QA measurement in CPM, DPM, DPM/100 cm2 or c/s, Bq, Bq/cm2. The SA-20-2 probe connects to survey meter via a 1.5 meter or 20 meter CSP cable. The SA-20-2 unit includes a hand screwed protective grid that is very easy to remove for decontamination. The SA-20-2 probe is able to store up to 1000 data points from a data- logging procedure handled via the host instrument. These data are: Index, date/time, measurement value, selected unit and counting time. The SA-20-2 probe can be upgraded (probe’s firmware) via CSPS, a USB cable and a PC. 


Software Downloads



Follow CSPS user manual upgrade procedure to load new firmware into CSP probe of interest.

This document describes the changes between previous firmware version and any known issues.

RELEASED VERSION: 91629_A_V-2011-01-24.HEX

· SA20 probe P/N: EM75270
· SA20-2 probe P/N: EM90062
· SA32 probe P/N: EM90666
· SB20 probe P/N: EM74672
· SAB100 probe P/N: EM75864
· SABG100 probe P/N: EM81833
· SA100 probe P/N: EM75863
· SB100/A probe P/N: EM75862
· SB100/B probe P/N: EM82069
· SG1-R probe P/N: EM75860
· SG2-R-A probe P/N: EM75861
· SX2-R-A probe P/N: EM78677
· SPAB15 probe P/N:EM78766

New Features:


Known Isuues:

HV failure not active for SPAB15 probe

The status bit 5, power supply failure, is not functional.


SG1-R and SG2-R probes can show a sporadic saturation due to a timing conflict between the analog to digital conversions made in the probe

The initialization time is now set to 30s instead of 20s. 20s was too short to cover the necessary stabilization time of some SG2-R probe

The period of FRAM integrity check is now set to 30s instead of 20s. Because it is
synchronized with the initialization bit


Need a CSPS version higher than V2.00B to uses the 'firmware update' and 'writing
defaults parameters' functions

Need a Radiagem firmware version higher than V2.19


1218 Menlo Drive, Suite A
Atlanta, GA 30318

Sales Phone: 770.432.2744
Support Phone: 770.432.2744

Support and Sales for Detection and Measurement and Radiation Monitoring Systems products in the Americas.

Africa | Asia | Europe | Middle East | Pacific
174 Route d'Eyguières
FR-13113 Lamanon, France

Sales Phone: +33 4 90 59 59 59
Support Phone: +33 4 90 59 60 60

Sales and Service for Detection & Measurement and Radiation Monitoring Systems in Asia, Europe, the Middle East, Africa and Pacific