- Typically, these laboratory microphones should be calibrated at least once a year, or as required by your quality system or ISO 17025 guidelines.
- More frequent calibration may be necessary if used in harsh conditions, after accidental shock or overload, or with exposure to contaminants.
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Br�El & Kj�R 4138 Calibration
Why Br�El & Kj�R 4138 Owners Go Rogue for Calibration Sourcing
The Br�el & Kj�r 4138 1/8" Condenser Microphone is a workhorse tool — widely used, well understood, and absolutely critical when accuracy matters.
Finding the right calibration provider shouldn’t slow you down. Instead of searching lab directories or settling for the first option you find, Rogue Calibration does the heavy lifting for you, connecting you with qualified providers that meet your technical and quality requirement for Br�El & Kj�R 4138 calibration.
✓ Fair, competitive pricing
✓ Providers that actually know Br�El & Kj�R products
✓ Clear turnaround times
✓ Traceable calibration options
✓ Transparency before you commit
Rogue Calibration makes that happen by letting the market do what it does best.
Our partners provide traceable electrical calibration services to help ensure measurement accuracy, compliance, and continued usability of your equipment.
Quick Overview
- What it is: 1/8" precision condenser microphone (pressure field type)
- Typical use: Acoustic and ultrasonic measurements up to 140 kHz, calibration labs, audiometry equipment, specialized R&D
- Status: Active (fully available and in production)
A Br�el & Kj�r 4138 1/8" Condenser Microphone doesn’t lie—but it will expose lazy calibration. High‑accuracy measurements demand calibration performed by technicians who understand the 4138, the specification limits, and the standards behind them.
Expert calibration verifies performance against traceable references, flags drift before it becomes failure and documents every adjustment. This isn’t box‑checking or sticker‑slapping. Its precision enforced. If your work depends on numbers you can defend, Rogue Calibration helps find the right calibration service provider for you.
Who is Rogue Calibration?
Built for speed, clarity, and real-world use, Rogue brings a modern approach to a process that hasn’t changed in decades. We're about simplicity... because we know this space and we have the tools to solve this problem We're results-obsessed.
We focus on: Clear requests, Connections with trusted providers, Better outcomes for both sides.
www.roguecalibration.com
Why Br�El & Kj�R Owners Use Rogue Calibration
Br�El & Kj�R equipment is widely used across industrial and commercial environments, but finding the right Br�El & Kj�R 4138 calibration provider doesn’t have to be difficult.
Rogue Calibration saves you time and money by connecting you with experienced labs, competitive pricing, traceable calibration options, and clear turnaround times, so you can choose the right provider with confidence.
Rather than performing calibrations ourselves, Rogue Calibration acts as your single point of contact.
- You submit a calibration request for your Br�El & Kj�R 4138
- We send your inquiry to multiple vetted calibration service providers
- Providers respond directly with quotes, turnaround times, and capabilities
You choose the provider that best fits your needs
No pressure. No obligation. Just options.
Product Information
- Manufacturer: Br�el & Kj�r
- Model Number: 4138
- Model Details: Extremely small, high-frequency laboratory standard microphone, ideal for precision acoustic measurements up to 140 kHz.
- Category: 1/8" Condenser Microphone
- Calibration Discipline: · Dimensional Calibration (in terms of verification cases, less common, but possible for physical dimensions)· Electrical Calibration (signal integrity)· Reference·Level Electrical Standard· RF & Microwave Calibration (since it measures sound into high ultrasonic frequencies; some overlap)· Voltmeter & Voltage Reference Calibration Lab Services (in calibration lab context)· (Mostly, this microphone is calibrated as part of Acoustic Calibration, which is not a discipline in the list, but electrical and reference standards are involved.)
Calibration — Without the Bureaucracy
Finding calibration for a Br�El & Kj�R 1/8" Condenser Microphone usually means:
- Calling multiple labs
- Waiting days for quotes
- Getting “standard” pricing with zero flexibility
- Being pushed toward whoever answers first
Rogue Calibration cuts through all of that.
✓ You submit one request.
✓ We send it out to our network of calibration service providers.
✓ They respond — with real options.
You decide who earns the work.