Neutron Survey Meter [ TYPE : NSM741 ]
Technical Data
Neutron Survey Meter Type : NSM 741 is a portable micro-controller based battery operated instrument designed primarily for measurement of leakage neutron radiation normally encountered in Medical Cyclotron Facilities, Nuclear Power Plants and other industries where neutron source is used for certain industrial applications. Neutron Survey Meter finds industrial applications such as, in cement, mineral and coal industries where cross belt on-line analysers, based on Neutron activation Analysis are used. Neutron Survey Meter serves as a radiation protection instrument, to measure leakage radiations from the Cross-belt Analysers. Neutron Survey Meter can be used for measurement in three modes CPS, CPM & Dose rate (μSv/h). The unit can measure in the range of (0.1 µSv/h to 10mSv/h) in dose rate mode. This meter measures Ambient Equivalent Dose from Thermal to Fast Neutrons with External Probe moderated with Polyethylene Sphere.
Features
Specifications
| Radiation Detected | Ambient Dose Equivalent H*(10) for Fast/Thermal neutron Radiation. |
|---|---|
| Detector | 3He proportional detector surrounded by 9″ dia Polyethylene sphere, as moderator. option: (a) Tubular detector : Effective Volume: : 45 cm3. Sensitivity : Approx. 30cpm/µSv/h. Operating Voltage : 1000 – 1050V approx. option : (b) Spherical detector : Effective Volume : 64.57 cm3. Sensitivity : Approx190cpm/µSv/h Operating Voltage : 1450V approx. |
| Measurement Range(S) | a) Countrate CPS, CPM (0-999999) b) Doserate (0.1µSv/h to 10mSv/hr) |
| Neutron Dose Rate | (0.1 µSv/h to 10mSv/h). |
| Alarm | Provision for audio/visual alarms if Dose-rate exceeds pre-set level along with Chirps for Radiation events detected. |
| Energy Range | 0.025ev to 15MeV. |
| Gamma Rejection | Better than 0.1Sv/h in Neutron channel. |
| Calibration Accuracy | Better than +/-10% with Am -Be source. |
| Data storage | Can store up to 1000 data readings and stored data can be recalled back on to display. |
| Serial port (optional) | Built-in serial port facilitates data downloading in to PC. Data communication software with connecting cable can be provide at extra cost as an additional option. |
| Control Buttons | ON/OFF, START, STOP, PROG, STORE, INC & DEC are the SEVEN Control buttons provided on the instrument. The above buttons allow the user to program & operate the instruments in appropriate manner. |
| Power | A rechargeable battery of 7.5V with 3000mAh capacity. |
| Weight | <7.5 kgs along with Probe. |
| Carrying case for transport | Available. |
