The HD 2020 sound level calibrator is a portable, battery operated sound source, suitable for sound level meters (portable and laboratory) and acoustic stations. It allows calibrating ½" microphones with mechanical dimensions compliant with IEC 61094-1 ("Measurement microphones. Part 1: Specifications for laboratory standard microphones") and IEC 61094-4 ("Measurement microphones. Part 4: Specifications for working standard microphones"). The calibration pressure levels of 94dB and 114dB can be selected by the keypad. The 1000 Hz frequency cannot be changed.
If the microphone is absent or not inserted correctly into the calibrator cavity, the sound level will blink on the display.
To conserve battery life, the instrument is provided with an automatic power off function: if you leave the instrument on with open cavity, it switches off automatically after 30 seconds. If the cavity is closed and the microphone is inserted, the instrument switches off 5 minutes after turning on, provided that you don't press any key.
The calibrator display shows calibration pressure level, battery life, current date and time.

Sound level calibrator class 1 according to IEC60942:2003 with LCD display. ISO 9001 calibration report included.

Advantages of the HD 2020 Sound level calibrator are:
• The 1000Hz frequency allows calibrating sound level meters with any weighting (LIN, A, B,...), without applying any correction factor.
• The calibration sound pressure level is independent of atmospheric pressure: you don't need to adjust the value according to static pressure over a wide range of values.
• The HD 2020 calibrator can be conveniently used both in laboratory and in the field. The 114 dB sound level allows performing calibrations even in high background noise environments.
• Its simplicity of use allows the use even by unskilled personnel.
• The presence of the LCD helps you through the steps of setting the calibrator, signal the end of the span and allows you to check the status of the battery.

ACOUSTIC CALIBRATOR
1. ON-OFF key: turns on and off the instrument. When you turn the instrument on, the display will switch on about three seconds later.
2. SETUP key: allows you to enter and scroll menu. To exit, press it repeatedly until you go back to the standard screen.
3. Display. When you turn the instrument on, it shows all segments on, and then the sound pressure level (94 or 114dB) will appear in standard view.
4. Calibrator cavity for conventional ½ inch microphones.
5. Down: in standard mode, it selects 94dB and 114dB pressure levels alternately. In menu mode, it decreases the current value.
6. Up: in standard mode, it selects 94dB and 114dB pressure levels alternately. In menu mode, it increases the current value.
7. Battery lid.

More products SENSECA

THERMOPILE PYRANOMETER FOR MEASURE INCOMING GLOBAL SOLAR RADIATION DELTA OHM LP PYRA02 PYRA03 PYRA12

• First class pyranometer according to ISO 9060.
• Complete with: shade disk, sachet with silica-gel crystals, 2 cartridges, levelling device and calibration report.
• On request 5 or 10m cables with connectors

THREE-AXIS ULTRASONIC ANEMOMETER FOR WIND SPEED & DIRECTION MEASUREMENT DELTA OHM HD2003 HD2003.1

• Determination of the anemometric quantities represented in diverse measurement units:
• wind speed and direction,
• U-V-W Cartesian components of speed,
• sound speed,
• sonic temperature
• 5 analogue voltage or current outputs, with different measuring ranges.
• RS232 and Multidrop RS485 Serial Communication interfaces.

HANDHELD DIGITAL THERMOCOUPLE THERMOMETER K, J, T, R, N, S, B, E DELTA OHM HD2108.1 HD2108.2 HD2128.1 HD2128.2

• Thermocouple thermometer with one input and logger 32.000 samples
• For K, J, T, R, N, S, B, E type probes with miniature connector
• Storage of maximum, minimum, average value,
• USB/RS232 C connection to download loggerdata to PC.
• Functions: REL, HOLD and auto power off which can be disabled,
• IP 67 protection degree

SECONDARY CLASS PYRANOMETER FOR DIRECT SOLAR IRRADIANCE ON FLAT SURFACE AND GLOBAL RADIATION DELTA OHM LP PYRA10

• measures the irradiance on a flat surface (Watt/m2)
• pyranometer classified as Secondary in accordance with ISO 9060
• according to the publication "Guide to Meteorological Instruments and Methods of Observation", fifth edition (1983) of WMO
• LP PYRA 10 PASSIVE *
• LP PYRA 10 AC ACTIVE with CURRENT 4..20 mA output
• LP PYRA 10 AV ACTIVE with VOLTAGE 0..1 V, 0..5 V, 0..10 V output

NET RADIOMETER FOR ULTRAVIOLET TO INFRARED SOLAR RADIATION MEASUREMENT DELTA OHM LP NET07

• LP NET 07 measures the net radiation across a surface, from near ultraviolet to
• far infrared.
• The Net radiation is defined as the difference between the radiation that reaches the upper surface and the irradiation on the lower surface of the net radiometer.
• The surface of the upper receiver measures the direct solar radiation plus the diffuse one and the radiation at longer wavelengths emitted from the sky (clouds), while the lower receiving area measures the solar radiation reflected from the ground (albedo) and the radiation length wavelengths emitted from the earth.
• The instrument is designed and constructed to be used outdoors in any weather
• conditions.

AIR QUALITY ANALYSIS MONITORING DATALOGGER CO CO2 DELTA OHM HD37AB17D HD37B17D

• data loggers able to measure and memorize simultaneously the following parameters:
• Relative Humidity RH
• Environment temperature T
• Carbon monoxide CO (only HD37AB17D)
• Carbon dioxide CO2
• DeltaLog13 communication software via the USB port

PORTABLE CLASS I INTEGRATING SOUND LEVEL METER WITH SPECTRUM ANALYSIS ANS STATISTICS DELTA OHM HD2010

• precision integrating portable sound level meter
• data logging functions
• performing both spectrum and statistical analysis
• maximum flexibility and simplicity
• firmware can be directly updated by the user by means of the Noise Studio program supplied with the instrument
• Class 1 sound level meter according to IEC 61672-1, 2002
• Class 1 octave and third octave filters according to IEC 61260
• Microphone complying with IEC 61094-4
• Noise monitoring and optional capture and analysis of sound events
• Octave and optional third octave band spectrum analysis from 16 Hz to 20 kHz

CONDUCTIVIMETER-THERMOMETER FOR CONDUCTIVITY, LIQUID RESISTIVITY, DISSOLVED SOLIDS, SALINITY, TEMPERATURE DELTA OHM HD2106.1 HD2106.2

• Conductivity-Thermometer measures conductivity, liquid resistivity, total dissolved solids, salinity and temperature.
• Datalogger which can store the maximum, minimum, average value and can store up to 36,000 samples.
• RS232 C/ USB output for data transfer in real time to a PC or printer.
• Functions: REL, HOLD and auto power off which can be disabled,
• IP 67 protection degree.

MULTIFUNCTION DATALOOGER WITH MICROCLIMATE ANALYSIS DELTA OHM HD32.1

• Globe temperature
• Natural wet bulb temperature
• Ambient temperature
• Atmospheric pressure
• Relative Humidity
• Air velocity
• Air temperature at the height of the head...

LUXMETER RADIOMETER MEASURING ILLUMINANCE, PAR, IRRADIANCE DELTA OHM HD2302.0 HD2302.0VP474

• Device for measuring illuminance, luminance, PAR, irradiance
• Storage of maximum, minimum, average value.
• Functions: REL, HOLD and auto power off which can be disabled,
• IP 67 protection degree