• Radiation Alert® SEI Inspector USB

    The SEI Inspector USB features built in isotope efficiencies, download your data from the internal memory, great sensitivity, backlit display, timer and an optional wipe test plate for swipes.

SEI Inspector USB / Digital Radiation Detector - a ß y x

SEI Inspector USB

NOW WITH FREE OBSERVER USB SOFTWARE !!

The SEI Inspector and SEI Inspector Plus are now SEI The Inspector USB!! Now with USB and the free Observer USB Software, you can download your data from the internal memory, set computer alarms, and calibrate your instrument! The SEI Inspector USB Handheld Digital Radiation Alert® Detector is a small, microprocessor based survey meter which offers excellent sensitivity to low levels of alpha, beta, gamma, x-rays, and built in efficiencies for common isotopes to calculate activity in Bq and DPM.

Detector

Internal Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.77 in.). Radiation symbol on front label and end panel marks the center of the detector.

Operating Range

mR/hr - .001 (1µR) to 100
CPM - 0 to 350,000
µSv/hr - .01 to 1000
CPS - 0 to 5000
Total Counts- 1 to 9,999,000 counts
Accuracy (Referenced to Cs137)
Typically ±15% from factory, ±10% with NIST Source Calibration

Energy Sensitivity

Detects Alpha down to 2 MeV. Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV is
approx. 25%. Detects Gamma down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs). Smallest detectable level for 125I is .02 µCi at contact.

Built-In Efficiencies

Sulfur (35S), Strontium (90Sr/y), Cesium (137Cs), Phosphorus (32P), Carbon (14C), Iodine (131I), Cobalt (60Co), and Alpha

Selectable Alert Set Range

mR/hr .001 - 50 and CPM 1 - 160,000. 70db @ 1m. Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS. Alarm will sound when in Timer Mode when set alarm threshold is reached.

Anti-Saturation

Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.

Averaging Periods

Display updates every 3 seconds. At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.
Energy Response Curve

Display

Backlit 4 digit liquid crystal display with indicators.

Count Light

Red LED flashes with each radiation event.

Audio Indicator

Internally mounted beeper (can be switched off for silent operation)

Outputs

3.5mm jack for CMOS or TTL devices and counts to computer or datalogger.
USB for use with Free Observer USB Software for PCs

Power Requirements

One 9-volt alkaline battery (non-rechargable) or USB-AC Adapter. Battery life is approx. 1200 hours at normal background.

Temperature Range

-10ºC to 50ºC (14ºF to 122ºF)

Weight

273 g (9.6 oz.) without battery.

Size

150 x 80 x 30 mm (5.9 x 3.1 x 1.2 in.).

Includes

Carrying Case, Certification of Conformance, USB Cable, Observer USB Software

Options

Xtreme Boot, Wipe Test Plate, & Stand

Limited Warranty

1 year limited warranty

Operation Manuals (PDF)

English | Spanish | French | Deutsch| All SEI Inspector USB FAQs

contact

Operation Manuals (PDF)
| English | Spanish | French | Deutsch |

Operation Manuals (VIDEO)
| Chap 1 - Introduction | Chap 2 - Setting The Alert | Chap 3 - The Utility Menu | Chap 4 - Selecting an Isotope | Chap 5 - Activating The Data Logging |s

Operation Manuals (HTML)
| English | (Bing Translator Available on Page)

| ALL SEI Inspector USB FAQs | Quick Specs | Responder Knowledge Base |



Frequently Asked Questions about The SEI Inspector USB / Search for more FAQs in the search field above


When I put the SEI Inspector USB in total mode, it does not accumulate the total counts.

The latest version of the SEI Inspector USB requires that the timer be set prior to accumulating total counts.

Can I power the detector with just the USB without a battery?

Yes. The unit will run with a standard miniUSB plug and AC adapter.

How many data points can be stored in the internal memory of the SEI Inspector USB?

Total 1356. At 1 minute intervals, that's 22.6 hours. At 10 minute intervals, that's 226 hours (9.4 days) At 1 hour intervals, that's 1356 hours (56.5 days)

How do I power The SEI Inspector USB?

The standard means is a 9 volt alkaline batter, There is no issue with using a Lithium 9 Volt battery and you can power The SEI Inspector USB via the USB port and a standard USB-AC adapter.

When I put the SEI Inspector USB in total mode, it does not accumulate the total counts.

The latest version of the SEI Inspector USB requires that the timer be set prior to accumulating total count.

To take a timed count, follow these steps:

1. With the SEI Inspector operating, set the Mode switch to Total/Timer. The display shows 0 and Total in the upper left portion of the display.

2. Press the SET button on the end panel to set the time for your count. You will see the hourglass, and the most recent timing period used. The first time you use the timer, the setting is 00:10 (ten minutes).

3. Use the + and - buttons to set the timing period. The timed period can be for 1 to 10 minutes in oneminute increments, for 10 to 110 minutes in 10-minute increments, or for 2 to 24 hours in 1 hour increments.

4. Press the SET button. The SEI Inspector starts totaling the counts it registers, and the numeric display is updated each time a count is registered. The hourglass indicator flashes during the timed period. During the counting period, if you want to see how many minutes remain, press and briefly hold the SET button. The display counts down from the time setting in hours and minutes to zero. For example, if the display shows 00:21, then 21 minutes remain.

5. At the end of the timed period, the SEI Inspector beeps 3 times and repeats the beeping 3 times. The number displayed is the total count and the hourglass will stop flashing.

6. To find the average dose rate for the timed period, divide the total by the number of minutes. The average count is in counts per minute. To convert to mR/hr for Cesium-137, divide by 3340.

7. Move the Mode switch to one of the dose/rate modes to return to normal operation. If you move the Mode switch to one of the dose/rate modes while the SEI Inspector is taking a timed count, the timed count will continue.

8. To reset the timer to take another timed count, press the SET button to set the time for another count.

9. Press the SET button a second time and the SEI Inspector will start totaling the counts it registers, and the numeric display is updated each time a count is registered.

The SEI Inspector USB requires that the timer be set prior to accumulating total count. Here's How:

To take a timed count, follow these steps:

1. With the SEI Inspector USB operating, set the Mode switch to Total/Timer. The display shows 0 and Total in the upper left portion of the display.

2. Press the SET button on the end panel to set the time for your count. You will see the hourglass, and the most recent timing period used. The first time you use the timer, the setting is 00:10 (ten minutes).

3. Use the + and - buttons to set the timing period. The timed period can be for 1 to 10 minutes in oneminute increments, for 10 to 110 minutes in 10-minute increments, or for 2 to 24 hours in 1 hour increments.

4. Press the SET button. The SEI Inspector starts totaling the counts it registers, and the numeric display is updated each time a count is registered. The hourglass indicator flashes during the timed period. During the counting period, if you want to see how many minutes remain, press and briefly hold the SET button. The display counts down from the time setting in hours and minutes to zero. For example, if the display shows 00:21, then 21 minutes remain.

5. At the end of the timed period, the SEI Inspector beeps 3 times and repeats the beeping 3 times. The number displayed is the total count and the hourglass will stop flashing.

6. To find the average dose rate for the timed period, divide the total by the number of minutes. The average count is in counts per minute. To convert to mR/hr for Cesium-137, divide by 3340.

7. Move the Mode switch to one of the dose/rate modes to return to normal operation. If you move the Mode switch to one of the dose/rate modes while the SEI Inspector is taking a timed count, the timed count will continue.

8. To reset the timer to take another timed count, press the SET button to set the time for another count.

9. Press the SET button a second time and the SEI Inspector will start totaling the counts it registers, and the numeric display is updated each time a count is registered.


Quick Start Video Guide

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