FOR SALE lot of 1 pc. ALPHA BETA AND GAMMA Pancake Geiger Counter Tube Beta1-1 analog of SI8B 

All tubes are new and tested working well. 

Parcel will be well packed and shipped by air mail with tracking number, shipping usually takes 12-21 days, depends on your location. 

If you need more tubes than listed or other type of devices please send me a message.

Beta1-1 Geiger Counter Tube Technical Specifications: 

⚙️ ⚡ Technical Characteristics 

Electrical Characteristics

• Recommended Operating Voltage: 400 V

• Operating Voltage Range: 350 – 550 V

• Start of Counting Voltage: 250 – 310 V

• Plateau Length: ≥ 200 V

• Plateau Slope: ≤ 0.25 % / V

• Recommended Load Resistor: 5.1 MΩ

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Sensitivity & Background

• Radiation Detection: Alpha / Beta / Gamma

• Gamma Sensitivity (Co-60): 96 – 144 pulses / µR

• Intrinsic Background: ≤ 0.6 pulses/sec
  (measured in a 50 mm lead chamber)

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Physical Characteristics

• Mica Window Area: ~7–8 cm²

• Dimensions: approx. 44 × 44 × 8 mm

• Weight: ~19 g

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Environmental & Lifetime

• Operating Temperature Range: −50 °C to +60 °C

• Expected Lifetime: ~1 × 10¹⁰ pulses

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✅ Key Features

✔ Large mica window for alpha & beta detection
✔ Wide voltage plateau for stable operation
✔ Low intrinsic background
✔ Modern production (2021)
✔ Suitable for professional and DIY Geiger counters

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📦 What’s Included

• 1 × Beta-1-1 (Бета-1-1) Geiger Counter Tube

Carefully packed to ensure safe international shipping.

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🚚 Shipping & Handling

• Ships within 1–2 business days

• Carefully packed to prevent damage

• Worldwide shipping available

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🔁 Returns

Returns accepted if the item is not as described.
Please contact the seller before returning.

Handling time is 5 days, but usually i ship much faster 1-2 days, as i have all items in stock. Despite the war in Ukraine post works well and all items are delivered quite fast. I am responsible for safe delivery of purchased items, so please buy with confidence.