---
title: "DSM-500 | Digital Radiation Survey Meter"
date: 2025-01-05T06:16:35Z
modified: 2025-12-15T19:26:15Z
permalink: "https://www.berkeleynucleonics.com/dsm-500/"
type: page
status: publish
excerpt: ""
wpid: 19346
---

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#### DSM-500 | Digital Radiation Survey Meter

 This microprocessor-controlled instrument represents the new gold standard of survey instruments. The DSM-500 boasts an oversized digital display and a unique capability for dual probe capability. Comes standard with timed-count capability, probe-saturation and error indicators.

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

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

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

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

#### Specifications

**Dose/CPM Switch**

External Dose/CPM Switch

**Input Sensitivity**

0.05V

**Display-LCD**

4-Digit x .75″ LCD w/LED Backlight

**LCD Refresh Rate**

0.8-3.0 Sec in 0.2 Sec increments – adjustable

**Dose Ranges**

0.0µR/hr-9999 R/hr

**CPM Ranges**

0-999.9 Kcpm

**Probe Linearization**

Internal adjust for cal constant and dead time

**Scaler Ranges**

0-999.9 Kcpm

**Scaler Count Time Ranges**

10-2550 Seconds (10-second increments)

**Alarms (optional)**

5-95% of Range

**Diagnostics**

Low Battery, Overrange – Audible & Visual Alarms

**Range Adjustment**

Auto-Ranging All Scales

**Electrical Non-Linearity**

< 5% Full Scale

**Response Time**

Fast – 10-2550 Seconds (adjustable) | Slow 10-250 seconds (adjustable)

**Drift**

< 5%

**Environmental**

-20°F\[-28°C\] to 140°F\[60°C\]| 5-95% RH IPX4 Housing

**High Voltage**

Adjustable 300-1500 VDC | Regulation +-1%

**Battery**

6 – “AA” Alkaline (nominal 100hrs Operation)

**Circuitry**

Digital Microprocessor Controlled

**Dimensions**

5.25″(14cm) H X 4″ (10cm) W x 7″(18cm) L

**Weight**

2.5 lbs. (1.2 Kilos)

**Construction**

Rugged, Heavy Duty Cast Aluminum & Stainless Steel

**Probes**

Supports All Johnson Probes

**Data Output**

9 Pin Serial RS-232 – Panel switch manual data extraction

#### Technical Resources

[ Model DSM-500 Datasheet](https://www.berkeleynucleonics.com/download/25467/?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#bnc-datasheets)
- [Product Firmware](/downloads#bnc-firmware)
- [Product Software and Drivers](/downloads#bnc-softwaredrivers)
- [Product Manuals](/downloads#bnc-manuals)

#### Price Lists

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



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