Castle dBAir Class 1 Environmental Noise Monitoring System

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  • Measurement of environmental sound from 20dB to 140dB (95dB linear range)
  • Assess parameters including Lspl, Leq, Lmin, Lmax, peak and percentiles
  • Calibrator, barometer, weatherproof protection, cable and tripod included
(Ex. VAT) £4,059.00 (Inc. VAT) £4,870.80

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  • Description

    Castle dBAir Class 1 Environmental Noise Monitoring System

    The Castle dBAir Class 1 Environmental Noise Monitoring System provides the user with all he/she needs to accurately perform assessments in compliance with BS4142, to monitor boundary noise, to monitor construction noise and to carry out compliance testing. The set contains the powerful smart Castle GA141 dBair Class 1 Sound Level Meter, a Class 1 calibrator, an electronic barometer, a weatherproof carry case, weatherproof microphone cable, weatherproof microphone protection and a heavy duty tripod. Additionally, a three-year licence is included for a Castle Cloud software Pro account for up to five users with five separate meters.

    The Castle GA141 dBAir Class 1 Environmental Sound Level Meter can measure sound pressure between 20dB and 140dB over two overlapping 95dB linear ranges. Readings are precise to 0.1dB and the Class 1 microphone picks up frequencies between 10Hz and 20kHz. Different measurement parameters include average (Leq), maximum (Lmax), minimum (Lmin), peak, and percentile measurement across several adjustable limits. Frequency weighting can be adjusted between A, C and Z and the response time can be set at a variety of different levels from 10ms to 24h.

    The 16GB internal memory on the Castle GA141E can save thousands of readings and these can be recalled in a graph format to the colour screen which also allows the user to operate the meter thanks to its intuitive menus. A particularly useful feature of the Castle dBair is the automatic wireless data transfer to the Castle Cloud online storage facility, accessible from anywhere in the world using the three-year software licence included in the package. This is particularly useful for remote monitoring when the system is left to take readings unsupervised.

    In order to ensure accuracy, the GA607 Class 1 Calibrator produces two separate tones at 1kHz (94dB and 104dB) so the sound meter can be checked at two separate points in both ranges. A GA690 electronic barometer allows the user to compensate for atmospheric pressure as it measures between 0 and 1300mbar.

    Several weatherproof accessories are included so the system can withstand the elements when left outside to monitor environmental noise over an extended period. A case for the whole set shelters the meter and accessories whereas specific microphone protection permits accurate measurement whilst preventing water ingress. A 3m microphone cable allows the microphone to be placed at the optimum location for capturing sound. Finally, a heavy-duty tripod holds the microphone up to 1.6m in the air.

    The Castle dBair Class 1 Environmental Noise Monitoring System is available for two, four, and eight day monitoring as well as in a long term package which contains a spare battery pack and weatherproof preamplifier . Octave band analysis (1/1, 1/3) can be added to any option at the cost of £475.00.

    Castle part number: NK107 / NK108 / NK109 / NK110 / NK116 / NK117 / NK118 / NK119

    Key Features

    • Performs BA4142 assessment
    • Monitors boundary/construction noise
    • Compliance testing capability
    • Measuring range: 20dB to 140dB
    • Class 1 measurement
    • Measurement parameters: Leq, Lmax, Lmin, peak, and percentiles
    • Class 1 calibrator
    • Electronic barometer
    • Weatherproof carry case
    • 3m weatherproof microphone cable
    • Weatherproof microphone protection
    • Heavy duty tripod (1.6m)
  • Specification

    Castle dBAir Class 1 Environmental Sound Level Meter

    • Applicable Standards: IEC 61672-1:2013; IEC 61260-1:2014 (Where Octave Bands Fitted)
    • IEC 61252:1993 amendment 1:2000 (Where Exposure Fitted)
    • Microphone: Class 1 - ½” Pre-Polarised - Free Field (IEC) Pressure (ANSI) Sensitivity (50mV/Pa)
    • Noise Floor (Typical): ‘A’ Weighting < 16.0dB; ’C’ Weighting < 15.0dB; ‘Z’ Weighting < 25.0dB
    • Measurement Ranges: 25 - 115dB (LOW); 50 – 140dB (HIGH)
    • Frequency Weightings: A, C or Z
    • Frequency Range: 1 Hz - 20 kHz (electrical characteristics); 10 Hz - 20 kHz (including microphone)
    • Time Weighting: Slow, Fast, Impulse
    • Octave Band Analysis: Where fitted 1/1 only
    • Display: 2.4” Full Colour TFT 240x320 pixels
    • Dual Measurements: Simultaneous dual measurement with independent time and frequency weightings.
    • Measurement parameters: LSPL, LE, LEQ, LMAX, LMIN, Peak, Ltm3, Ltm5, Lday, Levening, Lnight, Ldn, Lden, NA, 10 user-definable Ln values (pre-set to: L1, L5, L10, L20, L25, L50, L75,
    • L90, L95, L90) plus LAF* for Noise act assessment.
    • Languages: English UK, English US, Chinese, French, German, Italian, Portuguese, Brazilian, Russian, Spanish, Dutch, Greek
    • Time History: Short Interval 10ms to 60m; Long Interval 1s to 24h; Smart Timer, Duration Timer or Interval Timer
    • Memory: 16GB
    • Input / Output Connection: Micro USB Type B
    • Batteries: 4 x AA (1.5V)
    • Battery Life: Up to 8 Hours continuous operation (screen settings dependent)
    • Dimensions Including Pre-Amplifier: 210mm (H) x 70mm (W) x 30mm (D)
    • Dimensions Excluding Pre-Amplifier: 145mm (H) x 70mm (W) x 30mm (D)
    • Weight: 305g
  • Supplied Accessories

    Castle dBAir Class 1 Environmental Noise Monitoring System

    • Castle dBAir Class 1 Environmental Sound Level Meter
    • Castle GA607 Class 1 Sound Level Calibrator
    • Castle GA690 Electronic Barometer
    • Weatherproof microphone cable (3m)
    • Weatherproof mcrophone housing
    • Heavy duty tripod (1.6m)
    • Weatherproof carry case

    Castle dBAir Class 1 Environmental Long Term System

    • Castle dBAir Class 1 Environmental Sound Level Meter
    • Castle GA607 Class 1 Sound Level Calibrator
    • Castle GA690 Electronic Barometer
    • Weatherproof microphone cable (3m)
    • Weatherproof preamplifier & shield with dehumidifier (Pro DX-range)
    • Heavy duty tripod (1.6m)
    • Weatherproof carry case
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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

    For more information on delivery, please see our terms and conditions.