NTD’s range of manual RF shielded test boxes gives you a reliable, repeatable shielded environment without the lead time or cost of a full modular chamber build. Each model is supplied ready to use, with a downloadable spec sheet so you can match dimensions, connector interfaces and shielding effectiveness to your test setup before you order.
The range covers everything from a compact benchtop enclosure for forensic and R&D work through to a mobile shielded chamber built for antenna testing. If your project needs shielding beyond what a manual box can offer, our S100 and X100 modular chamber ranges cover that ground.
Compare the NSBR range
Four standard models, each built for a different kind of test. Select a model to jump to full details and spec sheet.
NSBR 03
Higher shielding, compact
370 x 388 x 370mm
≥80dB
NSBR 04
Forensic and R&D
408 x 396 x 408mm
≥75dB
NSBR 05
Glove box, hands-on
500 x 400 x 406mm
≥80dB
NSBR 06
Antenna testing, mobile
610 x 550 x 660mm
≥70dB
NSBR 03: Manual RF Shield Box with 15mm Absorber
NSBR 03 pairs 15mm absorber lining with the most compact footprint in the range, delivering ≥80dB shielding at 2.4, 5.8 and 7.125GHz. At 370 x 388 x 370mm internally it suits bench setups that need strong isolation without the space a larger enclosure takes up, and it’s built for R&D verification and production testing across smartphones, Wi-Fi, Bluetooth, smart grid equipment, automotive electronics, drones and IoT devices.
Key features
- 15mm absorber lining across the internal surfaces and door face, reducing internal signal reflection for cleaner, more repeatable readings
- ≥80dB shielding effectiveness at 2.4GHz, 5.8GHz and 7.125GHz across a 0.8 to 8GHz operating range
- Rear penetration panel carrying VGA, DB9, DB25, USB 2.0, USB 3.0, SMA, RJ45, BNC, RCA and DC, with 8 SMA positions and AC power available as an option
- RF filters populated to your specification rather than a fixed standard set
- Optional cooling fan for longer test cycles
- External footprint 450 x 490 x 426mm, 30kg, operating range 0 to 50°C
NSBR 04: Manual RF Shielded Box
Built for forensic work and R&D verification, NSBR 04 combines a low-profile absorber rated from 1 to 40GHz with a 408 x 396 x 408mm internal space and an integrated viewing window, so a device under test stays visible without breaking isolation. At 20kg it’s the lightest unit in the range despite the larger footprint, making it practical to move between benches or take to site.
Key features
- Low-profile RF absorber rated 1 to 40GHz, covering the internal surfaces and door face
- 200 x 120mm viewing window for direct sight of the device under test
- ≥75dB at 2.4GHz and ≥70dB at 5.8GHz across a 0.8 to 8GHz operating range
- Twin rear-panel fan positions for heat management during extended testing
- Full interface set: VGA, DB9, DB25, USB 2.0, USB 3.0, SMA, RJ45, BNC, RCA and DC, with AC power optional
- External footprint 460 x 552 x 437mm, 20kg, operating range 0 to 50°C
NSBR 05: Manual Visual Shielding Box
NSBR 05 is the glove box in the range. Twin 150mm glove ports let you handle and reposition a device mid-test without opening the enclosure, while a 250 x 150mm window and internal lighting keep the setup visible throughout. The top-opening lid rises to 52 degrees on gas struts for loading, and the box is designed to sit alongside automated production lines as well as serving forensic and audio module testing.
Key features
- Twin 150mm diameter glove ports for hands-on work inside a sealed enclosure
- 250 x 150mm viewing window with internal lighting for inspection during live testing
- Gas-strut lid opening to 52 degrees, 832mm total height when open
- ≥80dB shielding effectiveness at 2.4GHz, 5.8GHz and 7.125GHz across a 0.8 to 8GHz operating range
- CNC-machined plates, electrostatically sprayed and baked, then assembled and tested for structural consistency
- Interfaces: VGA, DB9, DB25, USB 2.0, USB 3.0, SMA, RJ45, BNC, RCA and DC, with 5 SMA positions and AC power optional
- External footprint 636 x 541 x 529mm, 30kg, operating range 0 to 50°C
NSBR 06: Mobile RF Shielded Chamber
NSBR 06 is a small shielded room rather than a bench box, supplied on a wheeled stand at 1450mm overall height so it sits at working level and moves between test areas. With 610 x 550 x 660mm of internal space and over 17dB of internal reflection attenuation, it’s built specifically for antenna testing and development, where signal bouncing inside the enclosure would otherwise distort measurements.
Key features
- Over 17dB internal reflection attenuation, reducing the signal bounce that corrupts antenna measurements
- Absorber lining across the internal surfaces and door face
- Largest internal space in the range at 610 x 550 x 660mm
- Supplied on a wheeled stand with side handles, 1450mm overall height, positioning the chamber at working level
- ≥70dB shielding effectiveness across a 0.8 to 6GHz operating range
- Interfaces optional to your specification: VGA, DB9, DB25, USB 2.0, USB 3.0, SMA, RJ45, BNC, RCA, DC and AC
- White finish with blue absorber lining, operating range 0 to 50°C
Which model fits your test?
- Need the smallest footprint with strong isolation? NSBR 03 gives ≥80dB shielding and 15mm absorber lining in the most compact enclosure in the range.
- Working on forensic device analysis? NSBR 04’s 1 to 40GHz low-profile absorber, viewing window and 20kg weight are built for this specifically.
- Need to handle the device mid-test? NSBR 05’s twin glove ports let you work inside the enclosure without breaking isolation.
- Testing antennas? NSBR 06 is the only model with internal reflection attenuation, and the only one supplied on a mobile stand.
Not sure which fits your project? Get in touch and we’ll talk through your requirement directly.
Compare Standard Models
Click the model name to download the full spec sheet
| Model | Type | Frequency Range (GHz) | Shielding Effectiveness | Internal Dimensions (mm) | External Dimensions (mm) | Weight (kg) | Interfaces | Appearance of Colour | Notes |
| NSBR 03 | Manual RF Shield Box with 15mm Absorber | 0.8-8 | ≥80 dB @2.4/5.8/7.125GHz | 370 x 388 x 370 | 450 x 490 x 426 | 30 | VGA, DB9, DB25, USB2.0/3.0, SMA (x8), RJ45, BNC, RCA, DC. AC optional | Yellow | 15mm absorber lining, optional cooling fan |
| NSBR 04 | Manual RF Shielded Box | 0.8-8 | ≥75 dB @2.4GHz, ≥70 dB @5.8GHz | 408 x 396 x 408 | 460 x 552 x 437 | 20 | VGA, DB9, DB25, USB2.0/3.0, SMA, RJ45, BNC, RCA, DC. AC optional | Blue & grey | Forensic and R&D, low profile absorber 1-40GHz, viewing window, twin fans |
| NSBR 05 | Manual Visual Shielding Box | 0.8-8 | ≥80 dB @2.4/5.8/7.125GHz | 500 x 400 x 406 | 636 x 541 x 529 | 30 | VGA, DB9, DB25, USB2.0/3.0, SMA (x5), RJ45, BNC, RCA, DC. AC optional | Yellow | Twin glove ports and viewing window, suits automated line integration |
| NSBR 06 | Mobile RF Shielded Chamber | 0.8-6 | ≥70 dB | 610 x 550 x 660 | 800 x 692 x 1450 (on stand) | On request | VGA, DB9, DB25, USB2.0/3.0, SMA, RJ45, BNC, RCA, DC, AC all optional | White with blue lining | Supplied on mobile stand, antenna testing, >17 dB internal reflection attenuation |
What RF shielded test boxes are used for
An RF shielded test box, sometimes called an electromagnetic shielding box or RF isolation enclosure, creates a controlled environment where a device can be tested without interference from outside signals, and without its own emissions escaping to affect nearby equipment. In practice that means repeatable results: the same test run twice gives you the same reading, because the ambient RF environment isn’t changing between runs.
Across the NSBR range, the most common applications are:
- EMC and RF compliance pre-testing. Catching issues on the bench before committing to a full accredited test lab booking, where a failed run costs both the retest fee and the schedule slip.
- Forensic device analysis. Isolating a seized phone or device from all wireless contact, so its state can’t be altered remotely while it’s being examined. NSBR 04 is the model specified most often for this work.
- Wireless R&D and QA. Testing 5G, Wi-Fi, Bluetooth, GPS and IoT devices without neighbouring equipment or building RF traffic corrupting the measurement.
- Production line integration. NSBR 05 is designed to work alongside automated production lines, with glove ports allowing manual intervention without breaking the shielded environment.
- Antenna testing. NSBR 06 adds over 17dB of internal reflection attenuation, reducing the signal bounce inside the enclosure that would otherwise distort readings.
- Automotive, smart grid and drone electronics. All four models are specified for terminal verification across these sectors alongside consumer wireless devices.
Frequently Asked Questions
What is an electromagnetic shielding box?
An electromagnetic shielding box is an enclosure built from conductive material that blocks RF signals from passing in or out, working on the same principle as a Faraday cage. Anything placed inside is isolated from external electromagnetic interference, and its own emissions are contained. Shielding effectiveness is measured in decibels (dB) at a given frequency, so a box rated ≥80dB at 2.4GHz attenuates signals at that frequency by at least that amount.
How much shielding effectiveness do I need?
It depends on the signal strength in your environment and how sensitive your measurement is. For most bench-level EMC pre-testing and wireless QA work, the 70 to 80dB range across the NSBR models is sufficient. If you need performance beyond what a manual box offers, or across a wider frequency range, our modular chamber ranges cover 10kHz to 10GHz (S100) and up to 40GHz (X100). Get in touch if you’re not sure which side of that line your project sits on.
What does the absorber lining actually do?
Shielding stops signals entering or leaving the box. Absorber lining deals with a separate problem: signals bouncing around inside the enclosure and reaching your measurement equipment as reflections rather than direct paths. Without it, readings can be distorted by the box itself. NSBR 03 uses a 15mm absorber, NSBR 04 a low-profile absorber rated 1 to 40GHz, and NSBR 06 adds over 17dB of internal reflection attenuation for antenna work where reflections matter most.
Which RF shielded enclosure is best for forensic device analysis?
NSBR 04 is the model built specifically for forensic and R&D use. Its low-profile absorber, 200 x 120mm viewing window and 408 x 396 x 408mm internal space accommodate larger devices while keeping them visible, and it carries the full interface set (VGA, DB9, DB25, USB 2.0/3.0, SMA, RJ45, BNC, RCA and DC, with AC optional) so you can maintain the connections an examination needs without breaking isolation.
Can I work on a device while it's inside the box?
Yes, with NSBR 05. Its twin 150mm glove ports let you handle and reposition a device without opening the enclosure, and internal lighting plus a 250 x 150mm window keep the setup visible while you work. The other models in the range are opened to load and unload rather than worked in.
What's the difference between a shielded test box and a modular RF chamber?
The NSBR boxes are pre-manufactured welded enclosures, supplied ready to use for testing a device or small setup on a bench. Our S100 and X100 modular chambers are built from RF panels, designed and assembled to suit the host building, and sized for people to work inside. If your requirement has outgrown a bench enclosure, the chamber ranges are the next step.
Can these boxes be customised?
RF filter populations are specified per customer rather than supplied to a fixed standard set, and AC power is available as an option across the range. If your project needs something further outside the standard specification, get in touch and we’ll discuss a bespoke build.
Do you supply spec sheets before ordering?
Yes, every model on this page has a downloadable spec sheet linked against it, covering internal and external dimensions, shielding effectiveness across frequency, interface options, operating temperature and weight, so you can confirm fit before you commit.
Need something a bit different?
Get in touch and we can discuss your bespoke RF Shield Box project, or explore our S100 and X100 modular chamber ranges for larger requirements
