Menu Close

HDWME – Microphone Outdoor Protection

Make:  Delta Ohm       Model:  HDWME
✅ The HDWME microphone unit is suitable for long lasting outdoor monitoring.
✅ Measurand : Air noise and noise from the ground
✅ Sensor Type : Microphone
✅ Signal Output : Digital.
✅ Supplied With : 5 m Cable,Windshield, Rainshield, Birdspikes, Factory test/ Calibration Certificates.

The HDWME microphone unit is suitable for long lasting outdoor monitoring, even in a fixed unattended location. The unit is adequately protected from rain and wind and the heated preamplifier together with the protective membrane coating of the microphone capsule provide stability of acoustic parameters over time and allow you to make measurements over a wide range of environmental conditions.

The Delta OHM sound level meter preamplifier matched with the outdoor microphone unit is equipped with a circuit for electrical calibration of the preamplifier – microphone chain, a technique that uses a charge distribution. The frequency response of the unit in open field meets the specifications of class 1 according to IEC 61672 (and IEC60651) and was certified by I.N.RI.M. (Certificate of conformity No. 10-0126-02 of 04.29.2010).

The microphone unit HDWME must always be positioned vertically to allow the anti-rain to perform its function and can be used both to detect the noise from the air and the ground. The Delta OHM sound level meters perform spectral corrections to the measures to ensure tolerances in accordance with the IEC61672 class 1 in every situation.

The easiness of disassembly and reassembly of the unit allows to perform periodic testing of the electroacoustic characteristics the same way as a standard measurement microphone, using a standard calibrator for 1⁄2″ microphone.




✅ Stationary and mobile noise control
✅ Long-term outdoor measurements
✅ Microphone protection from wind and rain
✅ Stainless birdspikes
✅ Heated preamplifier
✅ Frequency response according to IEC 61672:2002-5 (and IEC 60651:2001-10) and
ANSI S1.4:1983 class 1, both for airport and environmental noise
✅ Compatible with standard 1⁄2″ microphone sound calibrator

Delta ohm



Microphone MC21E


MC21E Type

½” standard condenser

MC21E Class


MC21E Polarization voltage


MC21E Frequency response

3.15 Hz – 20 kHz

MC21E Maximum sound pressure level (3% THD at 1kHz)

146 dB

MC21E Sensitivity

50 mV/Pa

Microphone UC52/1


UC52/1 Type

½” standard condenser

UC52/1 Class


UC52/1 Polarization voltage


UC52/1 Frequency response

20 Hz – 16 kHz

UC52/1 Sensitivity

22.5 mV/Pa

UC52/1 Maximum sound pressure level (3% THD at 1kHz)

146 dB

Microphone UC52


UC52 Type

½” standard condenser

UC52 Class


UC52 Polarization voltage


UC52 Frequency response

22.5 Hz – 10 kHz

UC52 Sensitivity

22.5 mV/Pa

UC52 Maximum sound pressure level (3% THD at 1kHz)

146 dB



Power supply

± 6V

Power consumption

5 mA


35 mA @ 6V

Output impedance

50 Ω


-25 … +70 °C

Relative humidity

< 100% without condensation

Dimensions (∅ x L) complete with birdspikes

90 x 470 mm


600 g

Thread for type MK microphone capsules

11.7 mm 60 UNS

Thread for type UC52 microphone capsules

M11.6 x 0.4

Thread for the support of the unit

M18 x 1, ½ W, ¼ W

Cable length

5 m (other lengths on request)


DIN 8-pole


There are no reviews yet.

Be the first to review “HDWME – Microphone Outdoor Protection”

Your email address will not be published.