In LIQUID SCINTILLATION Spectrometers... Only the ANSitron... PERFORMS ELECTRONIC COMPUTATION
A NEW CONCEPT...
Error Free
in automatic liquid scintillation counting, the ANSitron electronically processes accumulated data in as many as 200 samples. At the conclusion of each determination the ANSitron's computer section requires only microseconds to calculate sample count-rate. Count-rate for each channel computed to two decimal places, with background contribution elimi nated, is printed out together with sample number and counting time. For all measurements decimal points are properly positioned. Electronic computation reduces total data processing time, including print out, to less than three seconds per sample for a three channel instrument. Sample information is presented in a concise format, ideal for a permanent record or for error-free transcription. Reliability of the ANSitron's electronic computational circuitry is many times greater than that of mechanical calculators.
Quench Computation
And the ANSitron is capable of even more. Quenching in single or dual label samples is determined by means of a unique external stand ardization technique which gives computed data, independent of sample counting statistics. A novel low count rejection system, based on statistical principles, enables automatic rejection of low activity samples in seconds. Quartz-crystal controlled "live timing" provides automatic compensation of counting time for instrumental process time. Loga rithmic spectrum conversion results in the widest possible dynamic range; H 3 and P32 can be measured in the same sample without the need for attenuators.
All Silicon Reliability
The ANSitron, the only liquid scintillation spectrometer utilizing all silicon transistors and diodes and with neither conventional relays nor stepping switches has been designed with especial emphasis on reli ability. For an informative brochure describing these and the several other new features of the ANSitron write or phone:
ANS, Inc. P. O. B O X
37
WALLINSFORD, Phone: Circle No. 15 on Readers' Service Card
42 A
·
ANALYTICAL CHEMISTRY
Circle No. 17 οι Readers' Service Card
(203)
CONN.
265-1531
