Condition: Used

The Narda RadMan 2250/06 ESM-20 is a personal RF radiation monitor calibrated to ICNIRP 1998 occupational limits. Presented in good condition and supplied with accessories as pictured.

Typically includes:
• Narda RadMan ESM-20 (2250/06) monitor unit
• Accessories as pictured

The Narda RadMan ESM-20 (part number 2250/06) is a personal RF radiation monitor manufactured by Narda Safety Test Solutions GmbH. It is designed to protect workers in areas with elevated electromagnetic field levels — particularly in broadcasting, telecommunications, radar, and industrial RF environments. The monitor is worn on the body and provides continuous, isotropic monitoring of both electric (E) and magnetic (H) field components simultaneously.

The 2250/06 variant is calibrated to the ICNIRP 1998 occupational standard. Its sensors feature a shaped frequency response that automatically weights measurements across the frequency range to match the standard, eliminating the need for manual frequency adjustment.

Four LEDs indicate field exposure level relative to the permissible limit in steps of 12.5%, 25%, 50%, and 100%. A loud audible alarm sounds when 50% of the maximum permissible exposure is exceeded, with a second, more urgent alarm at 100%. An earphone jack allows the alarm to be heard in noisy environments. A yellow RF absorber cap is included: when fitted to the battery compartment, it provides an isotropic response suitable for use as a rapid field tester or waveguide leak locator. The removable absorber cap also minimises body-reflection effects when the unit is worn.

Key Features:
• Body-worn personal RF radiation warning device
• Simultaneous E-field and H-field monitoring
• ICNIRP 1998 occupational standard calibration
• Shaped frequency response — no manual frequency setting required
• Detachable yellow absorber cap for isotropic response and leak detection
• Audible alarm + earphone jack for noisy environments
• Max Hold function
• Compact, clip-on form factor for use on belt or harness

Technical Specifications:
Model: ESM-20 RadMan
Part Number: 2250/06
Standard / Guidance: ICNIRP 1998, Occupational
E-field Frequency Range: 1 MHz to 40 GHz
H-field Frequency Range: 27 MHz to 1 GHz
Frequency Response Type: Shaped (matched to standard)
Field Exposure Display: 4 LEDs at 12.5%, 25%, 50%, 100% of limit
First Alarm Threshold: 50% of maximum permissible exposure
Second Alarm Threshold: 100% of maximum permissible exposure
Alarm Threshold Level: 20 dB above standard (max 10 kV/m or 26.5 A/m)
Peak Damage Level: 40 dB above standard for pulse widths < 10 µs (max 100 kV/m or 265 A/m)
Input Signal Integration Time: 1 s
Sensor Design: Diode-based, isotropic
Data Logger: Not included (available on ESM-30 RadMan XT variant)
Power Supply: 2 x dry-cell batteries
Manufacturer: Narda Safety Test Solutions GmbH, Pfullingen, Germany

Narda ESM-20 RadMan / ESM-30 RadMan XT Operating Manual (English, Order No. 2250/98.21): Download PDF

Narda RadMan / RadMan XT RF Personal Monitors Product Brochure with specifications and model selection guide: Download PDF

Narda RadMan Personal Radiation Monitor datasheet including ICNIRP model selection and specifications: Download PDF

Narda RadMan / RadMan XT and RadMan Mobile combined datasheet with full model selection guide: Download PDF

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is not as specified, you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, and the email should include the order number, date and reason for return within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than not as specified.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is not as specified, in which case we will arrange a prepaid return label.