Sauter SU 130 sound level meter 30 to 130 dB with RS-232, measuring modes Lp, Leq, Ln

With the Sauter SU, you measure sound levels from 30 dB to 130 dB with 0.1 dB readability. The devices differ in terms of features and accuracy. The SU 130 is the model with basic functions and an RS-232 interface. It offers the measuring modes Lp, Leq and Ln, and has a measurement accuracy of 3 % of Max. According to the data sheet, the SU 150 has 1.5 % of Max measurement accuracy, states class II in the manufacturer data and has an analogue output, a memory for 63 measurements and switchable response times.

SU 130: basic device for the workplace

The SU 130 measures sound intensity in the workplace and helps to distinguish between normal sound levels and excessive noise exposure, for example in a production hall. It measures in the frequency range from 20 Hz to 12.5 kHz; the microphone has a sensitivity of 30 mV/Pa. There are three measurement functions to choose from: Lp is the standard sound level measurement, Leq is the energy-equivalent continuous sound level (type A) and Ln shows the deviation from a specified limit as a percentage. As acquisition modes, Kern specifies A (like the human ear), C (for loud environments such as machines and engines) and F (for constant sound levels).

There is also a programmable limit value function for the maximum level, the track function for changing conditions and the peak hold function. The memory stores 30 measurements, which can be transferred to a PC using the Sauter ATC-01 software. The RS-232 interface is included in the scope of delivery. The device comes with four AAA batteries in a carrying case.

SU 150: more accurate, with analogue output

The SU 150 measures in the frequency range from 31.5 Hz to 8 kHz and provides Leq and Lcpeak as measuring modes; the weightings are A and C. You can select the range manually or automatically and switch between a fast (125 ms) and slow (1 s) response. A simulated analogue bar shows the measured values quickly. The data hold function holds the current value, the limit value function with visual signal reports exceeding and falling below. The AC/DC analogue signal output transmits the signal for further processing. The memory can store 63 measurements. The device runs on four AA batteries; the auto-off function switches it off after 1 min and can be deactivated. A tripod (SW-A05) is available. The SU 150 is supplied in a pouch.

Device class and calibration

Kern does not specify a device class for the SU 130; for the SU 150, the data sheet states class II. For measurements where documentation is required, such as in occupational health and safety, the required class should be clarified in advance. For the SU 150, a DAkkS calibration certificate is available in addition to the factory calibration certificate.

Typical applications

• Workplace and noise assessment: measuring sound levels on machinery and in production halls
• Industry and assembly halls: checking sound levels at machinery and assembly stations
• Environmental monitoring and construction sites: recording and documenting noise levels (SU 150)
• Schools and traffic: measuring noise levels in classrooms and on roads (SU 130)
• Automotive industry: noise testing on components and test stands (SU 130)
• Events and public facilities: monitoring sound levels (SU 150)

Anyone carrying out simple sound level measurements in the workplace will find the SU 130 sufficient. The SU 150 is intended for higher accuracy, class II and the analogue output.

Models at a glance

Technical details

The model table contains the values for each model. This information applies to both models.

Scope of delivery

• SU 130: sound level meter with 4 AAA batteries and carrying case
• SU 150: sound level meter with 4 AA batteries and pouch

Calibration

A factory calibration certificate (item no. 961-281) can be ordered separately for both models. A DAkkS calibration certificate (item no. 963-281) is also available for the SU 150.

Warranty

According to Kern & Sohn, these devices come with a 2-year warranty. Kern grants 3 years on products with a list price of €500 or more and 2 years on products below that and on components; wear parts such as batteries and rechargeable batteries are excluded. Warranty repairs are carried out by Kern or by a Kern dealer.

Downloads

• Operating instructions SU 130 (PDF)
• Operating instructions SU 150 (PDF)

Regulatory information

As electrical devices, the sound level meters fall under the ElektroG. The manufacturer Kern & Sohn GmbH is registered under the WEEE registration number DE 80821200. How to return old appliances is described on the page Environment and disposal.

Individual requirements and procurement service

The ATC-01 software (for the SU 130), the SW-A05 tripod (for the SU 150) and the calibration certificates 961-281 and 963-281 are also available. Enquiries are handled via our procurement service.