PLEASE, READ CAREFULLY EVERYTHING. IT IS IMPORTANT.

About Item: The counter are designed to be operated in various dosimetric and radiometric devices. 
SBM20 is an analog of STS-5.

SBM-20 (STS-5) Hard Beta and Gamma GM Detector. Made in USSR.

If you have any questions, feel free to contact me.

Shown below are characteristics of SBM-20:

Gas Filling                                               Ne + Br2 + Ar.

Cathode Material - Stainless Steel         50 µm.

Working Voltage                                     (350 – 475) V.

Recommended Operating Voltage         400 V.

Initial Voltage                                          (260 – 320) V.

Plateau Length                                       at least 100 V.

Plateau  Slope                                        0.125 % /1V.

Inherent counter background (cps)        0.45 Pulses/s.

Pulse Sensitivity                                     24 Pulses/s.

Minimum Dead Time (at U=400V)         190 µs.

 Working range                                       (0.004 – 40) mkR/s.

Working range                                        (0.014 – 144) mR/h.

Gamma Sensitivity Ra226                     29 cps/mR/hr.

Gamma Sensitivity Co60                       22 cps/mR/hr.

Interelectrode Capacitance                    4.2 pF.

Minimum Anode Resistor                      1.0 MOhms.

Recommended Anode Resistor            5.1 MOhms.

Load Resistance                                    5 - 10 MOhms.

Working Temperature Range                 (-60 to +70) oС.

Maximum Length                                    (108-111) mm.

Effective Length                                     (91.0 – 83.5) mm.

Maximum Diameter                                11 mm.

Effective Diameter                                 10 mm.

Weight                                                    (9 – 10) g 

 

PLEASE, READ CAREFULLY!

SHIPPING METHODS:

1. Europe - Economy International Shipping - no tracking number.
If you wish faster delivery and tracking number, please select STANDARD International Shipping.
2. Worldwide - Standard International Shipping - with tracking number included in the cost of shipping.
3. Any order above $ 60 US - with tracking number included in the cost of shipping.

The ESTIMATED delivery time varies from 7 to 45 working days (9 weeks) to most of the countries.

Detailed info you can find in the table below.

 
Delivery time 
% of shipments that arrive in the said delivery time 
Countryworking days (without holidays and weekends)
<1515-2425-3435-45>45
<3 weeks5 weeks7 weeks9 weeks>9 weeks
Canada, United States5 %85 %7 %3 %0 %
Africa, South America5 %20 %55 %20 %0 %
Japan, South Korea10 %85 %5 %0 %0 %
Taiwan,  Thailand5 %45 %45 %5 %0 %
China, India5 %40 %50 %5 %0 %
Indonesia, New Zealand5 %40 %50 %5 %0 %
Israel5 %65 %30 %0 %0 %
Australia5 %55 %35 %5 %0 %
Russia5 %50 %40 %5 %0 %
Europe60 %35 %5 %0 %0 %
Others, not entered shall, countries5 %20 %55 %20 %0 %
   Items are generally shipped out within 24 (rarely 48) hours after payment has been confirmed (Holidays, Sat. & Sun. excluded). The delivery time depends on the destination, holidays, customs clearance factor and other factors.
   Please, if you have a problem, DO NOT OPEN CASE on eBay before this period has elapsed or before you communicate with us.
   We ship your package to your eBay address. Please update your complete address including full name and phone number during checkout. We are not responsible for any wrong or undeliverable address.
   INTERNATIONAL BUYERS – PLEASE NOTE: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.
   ADDITIONAL INFORMATION & QUESTIONS: The pictures are for general information only. They do not carry technical information. I apply maximum efforts to work better and better. It is very important for me to get your feedback to know, whether you are really satisfied completely! Please, contact us if you have questions - especislly in the delivery term. Please use the link "Ask seller a question".
   GUARANTEES & a POLICY of RETURN: We guarantee you complete satisfaction with all our products. If you receive an item you ordered damaged or defective, we will send replacement item. We only accept returns if the items in original package you have received are not what was described in the auction, damaged or defective. If exchange is not possible money refund will be issued. All returns must be sent to Bulgaria. Item for returning must have the original tags and packing, otherwise it won't be accepted.

Thanks And Good Luck!

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