Spark Counter
Affords a simple and cost effective technique for SSNTD based Alpha / Radon measurements
SSNTD films are used for detection and measurement of Radon and its progeny by identifying and analyzing the tracks that are created by the alpha particles of Radon and its decay products on SSNTD film when it is exposed to an atmosphere containing Radon. The exposed SSNTD is made to undergo an etching process which turns the nuclear tracks into holes in the films. These holes are counted to obtain Radon concentration. Automatic counting of the holes by jumping spark technique is an inexpensive yet accurate method.
Available Model : PSI – SC 1
Applications
Measurement of Radon and progeny by identifying and analyzing the tracks that are created by the alpha particles of Radon and its decay products on SSNTD film when it is exposed to an atmosphere containing Radon.
Physical Design Highlights
PSI-SC1 comprises a spark head assembly and a Control Unit.
The spark head assembly includes an acrylic base plate with two electrodes. A heavy SS counter weight arrangement over the base plate helps in tightly holding the etched / processed LR 115 SSNTD along with a Aluminized between two electrodes. The high voltage for pre-sparking and counting is applied between these electrode. The spark head assembly is mounted on a tripod stand.
The Control Unit is a microprocessor based electronic unit which controls the generation of the High voltage, the gate / window time and carries out the functions of counting, storage, display and serial communication with a PC.
Salient Features
- Micro-processor Based Design
- Alpha-numeric Display
- Highly Stable, Encapsulated High Voltage Supply
- Pre-Sparking & Counting Voltage Setting with keys
- Data Storage of 500 samples.
- Data Transfer through RS 232
- Separate Spark Head for Ease of Operation
Technical Specifications
Spark Head
| Material of Construction | SS 304 and Acrylic |
| Effective Circular Sparking Area | 1.000 cm2 |
| Sparking Area Uncertainty | 0.1% |
Control Unit
| Functions | EHT Output; Timing; Counting; Operator Interface; PC Interface |
| EHT Output | User settable from 100 Volts to 1000 Volts |
| Pre-sparking voltage setting mechanism | By digital potentiometer independent of Counting Sparking Voltage setting |
| Counting Voltage setting mechanism | By digital potentiometer independent of Pre-sparking voltage setting |
| Spark registration dead time | Less than 10 microseconds |
| Spark Counting Gate / Window time | User-settable from 1 to 10 Sec. |
| Spark Count Capacity | 99999 |
| Display | 32 character backlit LCD Module |
| Parameters Displayed | Counts; EHT; Sample Number |
| Operating Keypad | Comprising 4 keys with tactile feedback |
| Display Resolution - Counts | 1 count |
| Display Resolution - EHT | 1 Volt |
| Data Storage Capacity | Up to 500 samples data |
| Parameter Stored for Each Sample | Pre-sparking Voltage and Counting Sparking Voltage, Gate Time Pre-sparking Counts, Sample Counts ( 4 Runs ), Sample No. |
| Serial communication interface | RS 232 Serial port |
| Data retrieval software | Windows based application software |
| Operating Voltage | 230 V AC ± 20%, 50 Hz, Single Phase |
| Dimensions - Control Module | 23 cm x 20 cm x 28 cm |
| Dimensions - Spark Head | 8 cm dia. x 15 cm height |
Accessories :
Aluminized Mylar Film
Related Products :
- Twin cup SSNTD Dosimeter Model PSI-TCD1
- Constant Temperature Bath Model PSI-CTB1
