Brand: Brüel & Kjær

Bruel & Kjaer 2250-L-D21 Class 1 Sound Level Meter

Name: Bruel & Kjaer 2250-L-D21 Sound Level Meter – Datasheet
Brand: Brüel & Kjær

Description

Overview

The Brüel & Kjær 2250-L-D21 (also written Bruel & Kjaer 2250-L-D21) is a configuration of the Type 2250-L (2250 Light) hand-held analyzer, the Class 1 sound level meter built on the core platform of the Type 2250. It is delivered with the Sound Level Meter Software BZ-7130 and can be extended with optional 1/1-octave, 1/3-octave and logging software for workplace, environmental and product noise measurements.

The “-D21” suffix is not decoded in the published B&K product data, so the exact software options and accessory bundle behind this order code are confirmed with the customer before quotation. The specifications below are those of the Type 2250-L platform fitted with its standard microphone and preamplifier.

Key Features

Class 1 sound level meter to IEC 61672-1
Dynamic range of 120 dB without range switching, up to 140 dB with the supplied Type 4950 microphone
A, B, C and Z frequency weightings with F, S and I time weightings
Optional 1/1- and 1/3-octave analysis (BZ-7131/BZ-7132) and logging (BZ-7133)
Rechargeable Li-Ion battery pack QB-0061 with more than 10 h typical operating time
IP44 enclosure protection with USB and LAN interfaces

Technical Specifications

Parameter	Value
Order code	2250-L-D21 (configuration confirmed at quotation)
Instrument platform	Type 2250-L (2250 Light) hand-held analyzer
Accuracy class	Class 1, IEC 61672-1
Supplied microphone	Type 4950, 1/2 in. prepolarized free-field, 50 mV/Pa nominal
Microphone preamplifier	ZC-0032
Dynamic range	120 dB; levels up to 140 dB with Type 4950
Broadband frequency range	5 Hz to 20 kHz
Frequency weightings	A, B, C, Z
Time weightings	F, S, I
Battery	Li-Ion QB-0061, 3.7 V, 5200 mAh; >10 h typical operation
Interfaces	USB 2.0, LAN RJ45 (100 Mbps), SD card sockets
Operating temperature	−10 to +50 °C
Enclosure protection	IP44
Weight	650 g including rechargeable battery
Dimensions	300 × 93 × 50 mm including preamplifier and microphone
Internal memory	512 MB flash; SD/SDHC card and USB stick supported
Battery operating time	More than 11 h backlight dimmed; more than 10 h full backlight
Storage temperature	-25 to +70 °C
Humidity	93 % RH non-condensing at +40 °C
Total inherent noise, A-weighted (with Type 4950)	16.4 dB
Microphone extension cable	Up to 100 m without loss of specification
External DC supply	8 to 24 V DC, min. 1.5 A
Warm-up time	Under 2 min from power off; under 10 s from standby
Product status	The manufacturer is moving the 2250 Light to the B&K 2245 and HBK 2255 families

Applications

Occupational noise and hearing-conservation surveys in process plants and workshops
Environmental noise measurements for permit and compliance reporting
Routine noise checks by plant EHS and maintenance teams
Product noise and quality-control testing

Brüel & Kjær 2250-L Ordering Code and Options

The 2016 edition of the product data lists two base order numbers for the 2250 Light: Type 2250-L-S (analyzer) and Type 2250-L-SC (the same analyzer with Sound Calibrator Type 4231). The suffix D21 used in this part number is not explained in that edition; the licences actually installed should be read from the instrument or the delivery papers.

Every 2250-L listed there comes with Sound Level Meter Software BZ-7130, Tone Assessment Option BZ-7231 and Noise Monitoring Software BZ-7232. Hardware in the box is microphone Type 4950, preamplifier ZC-0032, 90 mm windscreen, hinged cover, battery pack QB-0061, mains supply and an accessory kit.

Options sold separately are BZ-7131 1/1-octave analysis, BZ-7132 1/3-octave analysis, BZ-7133 logging and BZ-7226 signal recording.

Brüel & Kjær 2250-L System Compatibility

Besides the supplied Type 4950, the instrument has correction filters for outdoor microphones Type 4952 and Type 4184-A. Calibration is done with Sound Calibrator Type 4231. For long-term outdoor work the manufacturer lists an all-weather case, weather station kits and 3 m or 10 m microphone extension cables. Data is handled on a PC with Measurement Partner Suite BZ-5503.

Why Seven Star LLC

Seven Star LLC supplies Brüel & Kjær acoustic and vibration instrumentation to EHS teams, laboratories, consultancies and maintenance departments across Oman and the GCC. Each item is checked against the original B&K type number and order code before the order is confirmed, and the required accessories and calibration documentation are agreed with the customer in advance.

Also available: SM-610-139 Brüel & Kjær Vibro Monitoring Module

Request a Quote for Bruel & Kjaer 2250-L-D21 Class 1 Sound Level Meter

Submit a formal inquiry with the order code 2250-L-D21, the quantity, any optional software (frequency analysis, logging), required accessories and the noise standard you follow. Inquiry Form

Reviews

There are no reviews yet.

How would you rate this product?

About brand

The Brüel & Kjær items on this page are mainly machine vibration monitoring products from Brüel & Kjær Vibro, the company based in Darmstadt, Germany. Its VIBROCONTROL monitors, rack modules and velocity sensors protect turbines, compressors, pumps and fans against damaging vibration.

Seven Star LLC is an independent supplier that sources Brüel & Kjær Vibro monitoring modules, monitors and sensors for plants in Oman and the GCC, mostly as replacements for units already in service.

Brüel & Kjær Vibro product families

The largest group here is rack hardware: SM-610 monitoring modules in many variants (the suffix, as in SM-610-A02 or SM-610-118, fixes the version), the PS-610 power supply module and the CI-620 communication interface. Stand-alone monitors include the VIBROCONTROL 1000, the VC-920 and the VC-868/1, alongside the AMO-622 monitoring system. Sensors include the VS-068 and VS-069 velocity sensors. The manufacturer's present machinery protection platform is the VC-8000. Laboratory accelerometers and sound and vibration analyzers that carry the Brüel & Kjær name are a separate product line, and a few of those instruments are listed here as well; send us the type number if that is what you need.

Where Brüel & Kjær vibration monitoring is used

Typical machines are steam and gas turbines, generators, centrifugal compressors, boiler feed pumps, cooling tower and process fans and gearboxes in power plants, oil and gas facilities, cement works and petrochemical plants. The monitors supply alarm and trip contacts to the plant protection system and measured values to the control room.

Ordering Brüel & Kjær Vibro parts: what we need

Send the complete type designation with its suffix, the order or part number from the label, and the serial number. For monitors add the measuring span, sensor type, supply voltage and output configuration, since many units are configured to order. For sensors give sensitivity, mounting direction, cable length, connector and the hazardous area approval. Photos of the label and of the rack help.

Browse Brüel & Kjær products by category: Vibration, Portable Test & Measurement, Sensors & Transmitters.

Frequently Asked Questions

What is the B&K 2250-L-D21 used for?

The 2250-L-D21 is the light version of the 2250 series, a Class 1 hand-held sound level meter for workplace and environmental noise assessment.

What is the difference between the 2250 and 2250-L?

The 2250-L is the light configuration of the series, covering the core Class 1 sound level measurement functions in an efficient package for everyday surveys and compliance checks.

Is the 2250-L accurate enough for compliance measurements?

Yes. The instrument is a Class 1 sound level meter meeting IEC 61672-1, providing the accuracy required for occupational and environmental compliance documentation.

What does the D21 order code mean?

The D21 suffix is not explained in the published B&K product data, so the exact configuration and software options are confirmed with the customer before quotation.

What accessories are recommended?

A typical setup includes the matching acoustic calibrator and the PC software for reporting. Seven Star LLC can confirm the correct accessories for your survey standard.

+968 90155212