---
title: "HP-265 | Alpha, Beta, Gamma Pancake Detector"
date: 2025-01-05T06:12:06Z
modified: 2025-10-01T04:59:44Z
permalink: "https://www.berkeleynucleonics.com/hp-265/"
type: page
status: publish
excerpt: ""
wpid: 19338
---

[ ![](https://www.berkeleynucleonics.com/wp-content/uploads/bnc_academy_upper_banner.png) ](https://academy.berkeleynucleonics.com/)
 [](https://www.berkeleynucleonics.com/wp-content/uploads/images/products/hp-265.png)

![hp-265](https://www.berkeleynucleonics.com/wp-content/uploads/images/products/hp-265.png)

- [ 
     Quote
     ](/customize-your-scintillation-detector)
- [ 
     Contact
     ](/contact/)
- [ 
     Datasheet
     ](#technical-resources-section)
- [ 
     Price List
     ](/access-pricelist/)

#### HP-265 | Alpha, Beta, Gamma Pancake Detector

 The HP-265, commonly known as the “Pancake” probe, has become the most popular detector for the general measurement of Alpha, Beta, and Gamma measurements. Built inside a ruggedized housing, this detector is the best general detector for most types of measurement applications.

##### [Specifications](#specifications-section)

##### [Tech Resources](#technical-resources-section)

##### [Downloable Resources](#downloadable-section)

##### [Price List](#pricelist-section)

#### Specifications

**General**

The best “all-purpose” detector. Sensitive to most Alpha, Beta, and Gamma Radiation

**Compatibility**

Compatible with all WB Johnson Instruments and Area Monitors (Additional Manufacturer compatibility upon request)

**Range**

0-200 mR/hr Dose (Cs-137) Requires linearization above 50 mR/hr

**Energy Response**

Alpha – 3.5 meV min, Beta – 1 keV min, Gamma – 20 keV-2 meV

**Operating Voltage**

900vdc

**Window Density**

1.6 mg/cm3

**Dead Time**

20 uSec

**Sensitivity (Cs-137)**

3300 CMP/mR/hr

**Sensitive Area**

15 cm2

**Environmental**

-20°F (-28°C) – 140°F (60°C) | 5-95% RH

**Circuitry**

100% Digital Microprocessor Controlled

**Dimensions**

2.74″ (7cm) Dia x 5.511″ (28cm) L

**Weight**

1lbs. (.5Kiles)

**Construction**

Cast Aluminum & Stainless Steel

#### Technical Resources

[ Datasheet HP-265 Datasheet](https://www.berkeleynucleonics.com/download/25437/?tmstv=1778700937)#### Downloadable Resources

 Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our [downloads page](/downloads).

- [Product Datasheets](/downloads#scint-datasheets)
- [Product Firmware](/downloads#scint-firmware)
- [Product Software and Drivers](/downloads#scint-softwaredrivers)
- [Product Manuals](/downloads#scint-manuals)

#### Price Lists

 [ Berkeley Nucleonics Price List 2026](https://www.berkeleynucleonics.com/download/19881/?tmstv=1778700937)



 [ ![](data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 1105 100'%2F%3E) ](https://academy.berkeleynucleonics.com/)