NDS Products — ND-15 Personal Rate Alarm

Personal Radiation Rate Alarm with Two Audible Range Alarms
SKU: TAN0132

Overview

The NDS Products ND-15 is a compact personal radiation rate alarm designed to provide immediate audible warning when the wearer enters an area where radiation levels exceed preset alarm thresholds.

The device features two audible range alarms, giving personnel an escalating warning as the detected radiation rate increases. This makes the ND-15 useful as a supplementary personal safety device in industrial radiography, radiation-controlled areas, laboratories, nuclear facilities, maintenance environments, and other locations where ionizing radiation may be present.

Its portable design allows the unit to be worn or carried during field operations, helping technicians maintain real-time awareness of changing radiation conditions without continuously watching a survey meter.

SKU TAN0132 identifies this ND-15 personal rate alarm configuration.

What's Included

Note: Personal dosimeter, radiation survey meter, batteries, calibration documentation, carrying case, belt clip, and other accessories are not included unless specified separately.

Box Dimensions & Shipping Weight (Estimated)

Actual shipping dimensions and weight may vary depending on packaging and included accessories.

Key Specifications

Note: Exact alarm thresholds, detector type, radiation-energy response, operating range, battery configuration, and calibration interval should be confirmed for the specific ND-15 unit supplied.

Dual Audible Alarm System

The ND-15 uses two audible alarm ranges to provide progressive warning as radiation conditions increase.

This dual-level system can provide:

• An initial audible warning at the first alarm threshold

• A higher-level warning at the second threshold

• Immediate personal awareness of changing radiation fields

• Hands-free warning during work activities

• Additional support when entering controlled or restricted radiation areas

The required response to either alarm should be defined by the facility's radiation-safety procedures.

Performance Features

Two Audible Alarm Levels
Provides two distinct warning ranges to help personnel recognize increasing radiation-rate conditions.

Portable Personal Configuration
Designed to be carried or worn during work around radiation-producing equipment or radioactive sources.

Immediate Audible Warning
Allows the user to receive a warning without continuously looking at a display or survey instrument.

Supports Radiation Awareness
Provides an additional layer of personal awareness when working near radiation-controlled areas.

Suitable for Industrial Field Use
Practical for NDT technicians, radiographers, maintenance crews, and radiation-safety personnel.

Simple Alarm-Based Operation
Focuses on fast personal warning rather than detailed quantitative radiation measurement.

User-Friendly Design

• Compact personal format

• Two-level audible warning system

• Suitable for carrying during field work

• Supports hands-free awareness when worn

• Practical for industrial radiography crews

• Suitable for controlled-area access

• Straightforward alarm-based operation

• Can supplement personal dosimetry programs

• Useful for inspection and maintenance personnel

Built for Radiation-Controlled Environments

• Suitable for professional radiation-safety programs

• Practical for industrial X-ray applications

• Useful for gamma-ray radiography operations

• Supports maintenance near radiation-producing equipment

• Suitable for controlled and restricted areas

• Useful in laboratories and nuclear environments

• Can provide additional awareness during source-related work

• Intended for trained personnel operating under established radiation-safety procedures

Personal Rate Alarm vs. Personal Dosimeter

The ND-15 and a personal dosimeter perform different functions.

ND-15 Personal Rate Alarm

• Provides immediate warning of elevated radiation-rate conditions

• Uses audible alarm indications

• Helps alert the wearer to changing radiation fields

• Supports real-time personal awareness

Personal Dosimeter

• Measures or records accumulated radiation dose

• Supports occupational exposure tracking

• May be passive or electronic

• Is commonly required by formal radiation-protection programs

The ND-15 should not be used as a replacement for required personal dosimetry.

Personal Rate Alarm vs. Survey Meter

The ND-15 should also not replace a calibrated radiation survey meter.

A survey meter is used to:

• Measure radiation-rate values

• Establish radiation-area boundaries

• Verify controlled-area conditions

• Confirm shielding effectiveness

• Check source position

• Perform formal radiation surveys

The ND-15 is intended primarily as a personal audible warning device.

Ideal Applications

• Industrial radiography

• X-ray NDT inspection

• Gamma-ray NDT inspection

• Pipeline radiography

• Weld radiography

• Radiation-controlled areas

• Nuclear facilities

• Power-generation facilities

• Research laboratories

• Source-handling operations

• Radiation-safety programs

• Maintenance near radiation sources

• Emergency-response support

• Field NDT service work

• Controlled-area personnel protection

Typical Users

The ND-15 may be suitable for:

• Industrial radiographers

• Radiographic assistants

• NDT technicians

• Radiation Safety Officers

• Nuclear maintenance personnel

• Laboratory technicians

• Source-handling personnel

• Inspection supervisors

• Field service technicians

• Workers entering radiation-controlled areas

Operating Guidelines

Before use:

• Inspect the device for visible damage

• Verify battery condition

• Perform any required functional test

• Confirm calibration status when applicable

• Verify that both audible alarm levels function correctly

• Confirm the device is positioned where the alarm can be heard

• Follow facility-specific pre-use procedures

During use:

• Wear or carry the alarm according to site requirements

• Remain attentive to audible alarm indications

• Respond immediately when an alarm activates

• Do not rely solely on the alarm to establish radiation boundaries

• Use an appropriate survey meter for quantitative measurements

• Follow Radiation Safety Officer instructions and site procedures

Alarm Response

If the ND-15 activates:

• Stop the activity when required by procedure

• Increase distance from the radiation source

• Move toward a known safe location

• Notify responsible radiation-safety personnel

• Use a calibrated survey meter to assess conditions

• Verify source position and shielding

• Do not re-enter until the area has been confirmed safe

• Document the event when required

Specific response actions should follow the applicable facility and radiation-protection procedures.

Compatibility

The ND-15 can be used alongside:

• Electronic personal dosimeters

• Passive dosimeters

• Radiation survey meters

• Area radiation monitors

• Industrial X-ray systems

• Gamma-ray exposure devices

• Radiation barriers

• Radiation warning signs

• Source-storage systems

• NDT radiography procedures

• Radiation-safety programs

Radiation Safety Considerations

The ND-15 should be used as a supplementary personal warning device.

It does not replace:

• Required personal dosimetry

• Calibrated survey instruments

• Radiation boundary control

• Source accountability

• Shielding requirements

• Required area monitoring

• Personnel training

• Regulatory requirements

• Site-specific radiation-safety procedures

Personnel using the device should be trained in radiation hazards and proper alarm-response actions.

Care and Handling

• Avoid dropping or striking the device

• Keep the enclosure clean and dry

• Protect from excessive moisture

• Do not expose the unit to temperatures beyond its intended operating range

• Inspect the housing and controls regularly

• Check battery condition before field use

• Perform functional checks according to procedure

• Store in a clean, protected location

• Remove batteries during extended storage when appropriate

• Do not attempt unauthorized internal modification

Calibration and Functional Checks

For dependable operation:

• Follow the applicable calibration schedule

• Verify alarm response at required intervals

• Maintain calibration or service records when required

• Perform pre-use functional checks

• Remove the unit from service if alarms do not operate correctly

• Have servicing performed by qualified personnel

• Follow regulatory and facility-specific requirements

About NDS Products

NDS Products supplies radiation-monitoring and radiation-safety equipment for industrial, NDT, laboratory, and controlled-area applications. Products such as personal rate alarms support personnel working around X-ray and gamma-ray radiation by providing additional awareness within established radiation-protection programs.