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Air Quality Meter / Particle Counter PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The particle counter PCE-RCM 11 serves as an indicative test of environmental parameters. The particle counter PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the particle counter provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Environmental Tester PCE-PH20P
US$ 462.00
ex. VAT, ex. delivery costs

Measurement of pH in cosmetics with an environmental tester is a priority test that should be carried out not only to ensure the conformity of the pH of the product with the pH of the skin, but also to ensure good quality, suitable viscosity, colour, scent and to ensure the shelf life of the cosmetics.

  • Measuring range: 0.00 … 14.00 pH
  • Resolution: 0.01 pH
  • Waterproof (IP 67)
  • Data-Hold function
  • Calibration: automatic, pH 4, 7, or 10
  • Applications: Shampoo, pastes, paints, cosmetics

Air Quality Meter PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The air quality meter PCE-RCM 11 serves as an indicative test of environmental parameters. The air quality meter PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the air quality meter provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Dust Measuring Device PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The dust measuring device PCE-RCM 11 serves as an indicative test of environmental parameters. The dust measuring device PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the dust measuring device provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Environmental Tester PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The environmental tester PCE-RCM 11 serves as an indicative test of environmental parameters. The environmental tester PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the environmental tester provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Ozone Meter / Base AQ-FM S900
US$ 492.00
ex. VAT, ex. delivery costs

The Ozone meter / base unit AQ-FM S900 is used to measure and control gas concentrations, and can communicate with a variety of hardware systems. The transmitter can also be used as switching relays with user-set values, as 4-20 mA output gas transmitter and it can communicate with a network via the RS485 interface. Changing sensor heads is quick and easy, no configuration changes required. Calibration certificate included.


  • Analog Output: 4-20 mA (optional isolated), 10… 30V
  • External control signal: Min Max. Alarm, control and diagnostics
  • Power supply: 12V DC 1A supply is not supplied but required
  • Interface: RS485Attention! No AQ sensor head is included in the delivery, it must be ordered separately as an accessory!

Air Humidity Meter PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The air humidity meter PCE-RCM 11 serves as an indicative test of environmental parameters. The air humidity meter PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the air humidity meter provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Airborne Particle-Counting Hygiene Meter PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The airborne particle-counting hygiene meter  PCE-RCM 11 serves as an indicative test of environmental parameters. The airborne particle-counting hygiene meter PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the airborne particle-counting hygiene meter provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Environmental Tester PCE-SLT-TRM
US$ 458.00
ex. VAT, ex. delivery costs

The environmental tester is a class II (type 2) sound level, sound pressure level (SPL), decibel (dB) or noise meter with audible or visual alarm output capability. The environmental tester is used for long-term, continuous monitoring of occupational noise exposure limits in industrial environments. AC powered.

  • Measuring range: 30 … 130 dB in 3 ranges
  • Resolution: 0.1 dB
  • Accuracy: ± 1.5 dB
  • IP 54 ingress protection rating on transmitter

Radiation Detector PCE-LXT
US$ 511.00
ex. VAT, ex. delivery costs

The radiation detector consists of a measuring sensor with a handle and a wall bracket with a 1.5 m (4.9 ft) cable, a light transmitter and a digital display. The main area of application of the radiation detector is in the continuous light measurement and light monitoring of photo laboratories and production rooms (e.g. food or drug production …).

  • Measuring range: 0 … 50000 lux in three areas
  • Resolution: 0.1 lx / 1 lx
  • Accuracy: ±5% of reading
  • 4 to 20-mA analog output

Environmental Tester CWG 2
US$ 496.00
ex. VAT, ex. delivery costs

Environmental tester with 0 … 10 V output. Environmental tester for measuring the horizontal wind speed with an analog output signal. The cup cross of the anemometer is made of plastic, the housing is made of aluminum and anodized. The device has a Pg 21 threaded pin with 2 nuts for mounting.

  • Measuring range: 0 … 50 m/s
  • Output signal: 0 … 10 V
  • Mounting: Pipe mounting / mounting via PG screw connection
  • Heating: yes

Radiation Detector PCE-UV 50
US$ 482.00
ex. VAT, ex. delivery costs
The Radiation Detector is a precise measuring instrument for simultaneously recording UV irradiance, UV energy and temperature. With its wavelength range of 340 nm ...420 nm, our Radiation Detector is ideal for applications in UV curing systems, UV dryers, UV LED light sources and exposure machines as well as for quality assurance in industrial UV processes.
<50mW/cm²: ±5 mW/cm², >50 mW/cm²: ± 10% v.Mw.

  • UV irradiance: 0 ... 40000 mW/cm²
  • Resolution: 1 mW/cm²
  • Accuracy: <50mW/cm²: ±5 mW/cm², >50 mW/cm²: ± 10% v.Mw.
  • UV energy: 0 ... 999999 mJ/cm²
  • Temperature measuring range: -55 ... 125°C / -67 ... 257°F
  • Resolution: 0.1°C / 1.8°F
  • Standards: JJG 879-2015, QB/T 2826-2017
  • Spectral range: 340 ... 420 nm (UVA)
  • Use e.g. in UV curing, UV light sources
Radiation Detector PCE-FRQ 500
US$ 472.00
ex. VAT, ex. delivery costs
This high-quality bug finder / Radiation Detector offers maximum security against surveillance devices and effectively protects your privacy. With a wide frequency range from 50 MHz to 8 GHz, the Radiation Detector reliably detects analogue and digital signals as well as hidden WiFi cameras, GPS tracking devices, radio bugs, transmitters and wireless cameras.

  • detection of analogue and digital signals 50 MHz ... 8 GHz
  • hidden WiFi cameras, GPS tracking devices
  • radio bugs, transmitters, wireless cameras
  • 16-stage signal strength display
  • range: 10 m
  • app for signal output
  • charging indicator light
Environmental Tester PCE-LXT
US$ 511.00
ex. VAT, ex. delivery costs

The environmental tester consists of a measuring sensor with a handle and a wall bracket with a 1.5 m (4.9 ft) cable, a light transmitter and a digital display. The main area of application of the environmental tester is in the continuous light measurement and light monitoring of photo laboratories and production rooms (e.g. food or drug production …).

  • Measuring range: 0 … 50000 lux in three areas
  • Resolution: 0.1 lx / 1 lx
  • Accuracy: ±5% of reading
  • 4 to 20-mA analog output

Light Meter PCE-LXT
US$ 511.00
ex. VAT, ex. delivery costs

The light meter consists of a measuring sensor with a handle and a wall bracket with a 1.5 m (4.9 ft) cable, a light transmitter and a digital display. The main area of application of the light meter is in the continuous light measurement and light monitoring of photo laboratories and production rooms (e.g. food or drug production …).

  • Measuring range: 0 … 50000 lux in three areas
  • Resolution: 0.1 lx / 1 lx
  • Accuracy: ±5% of reading
  • 4 to 20-mA analog output

Environmental Tester PCE-SLT-TRM-24V
US$ 442.00
ex. VAT, ex. delivery costs

The environmental tester consists of a measuring microphone with a handle and a wall bracket on a 1.5 m (4.9 ft) cable, a sound transmitter. The main area of ​​application of the environmental tester is in the continuous sound measurement and sound monitoring of factory halls, production rooms and at large events (night clubs, public festivals, kart tracks …).

  • Measuring range: 30 … 130 dB in three ranges
  • Resolution: 0.1 dB
  • Power supply: 24 V DC
  • Relay output and control output
  • Handle and wall bracket
  • Analog output signal

Radiation Detector PCE-LMD 5-ICA incl. ISO Calibration Certificate
US$ 484.00
ex. VAT, ex. delivery costs
ISO Calibration
The radiation detector has a large measuring range of 0 … 400 kLux. The illuminance is measured using an external silicon photodiode with a spectral filter. This means that the radiation detector can be positioned appropriately for every measuring task.

  • Measuring range: 1000 … 400,000 lux
  • Resolution: 0.1 lux
  • Lux and footcandle units
  • Rechargeable battery
  • incl. ISO Calibration Certificate
Environmental Tester PCE-UV 50
US$ 482.00
ex. VAT, ex. delivery costs
The Environmental Tester is a precise measuring instrument for simultaneously recording UV irradiance, UV energy and temperature. With its wavelength range of 340 nm ...420 nm, our Environmental Tester is ideal for applications in UV curing systems, UV dryers, UV LED light sources and exposure machines as well as for quality assurance in industrial UV processes.


  • UV irradiance: 0 ... 40000 mW/cm²
  • Resolution: 1 mW/cm²
  • Accuracy: <50mW/cm²: ±5 mW/cm², >50 mW/cm²: ± 10% v.Mw.
  • UV energy: 0 ... 999999 mJ/cm²
  • Temperature measuring range: -55 ... 125°C / -67 ... 257°F
  • Resolution: 0.1°C / 1.8°F
  • Standards: JJG 879-2015, QB/T 2826-2017
  • Spectral range: 340 ... 420 nm (UVA)
  • Use e.g. in UV curing, UV light sources
Electromagnetic Field Meter PCE-FRQ 500
US$ 472.00
ex. VAT, ex. delivery costs
This high-quality bug finder / Electromagnetic Field Meter offers maximum security against surveillance devices and effectively protects your privacy. With a wide frequency range from 50 MHz to 8 GHz, the Electromagnetic Field Meter reliably detects analogue and digital signals as well as hidden WiFi cameras, GPS tracking devices, radio bugs, transmitters and wireless cameras.

  • detection of analogue and digital signals 50 MHz ... 8 GHz
  • hidden WiFi cameras, GPS tracking devices
  • radio bugs, transmitters, wireless cameras
  • 16-stage signal strength display
  • range: 10 m
  • app for signal output
  • charging indicator light
Environmental Tester PCE-FRQ 500
US$ 472.00
ex. VAT, ex. delivery costs
This high-quality bug finder / Environmental Tester offers maximum security against surveillance devices and effectively protects your privacy. With a wide frequency range from 50 MHz to 8 GHz, the Environmental Tester reliably detects analogue and digital signals as well as hidden WiFi cameras, GPS tracking devices, radio bugs, transmitters and wireless cameras.

  • detection of analogue and digital signals 50 MHz ... 8 GHz
  • hidden WiFi cameras, GPS tracking devices
  • radio bugs, transmitters, wireless cameras
  • 16-stage signal strength display
  • range: 10 m
  • app for signal output
  • charging indicator light
Humidity Detector PCE-RCM 11
US$ 471.00
ex. VAT, ex. delivery costs
The humidity detector PCE-RCM 11 serves as an indicative test of environmental parameters. The humidity detector PCE-RCM 11 enables the measurement of fine dust, temperature and relative humidity. The bright display of the humidity detector provides information about the already mentioned parameters. 

  • Fine dust, formaldehyde, humidity, temperature, TVOC
  • Particle size channels : PM 2.5 / PM 10
  • Measuring range TVOC: 0.00 … 9.99 mg / m³ (volatile organic compounds)
  • Measuring range temperature: -20 … 70°C / -4 … 158°F
  • Measuring range humidity: 0 … 100% RH
  • Measuring range formaldehyde: 0.00 … 5.00 mg / m³
  • Interface: USB
  • For indicative measurements
Electromagnetic Field (EMF) Meter PCE-G28
US$ 432.00
ex. VAT, ex. delivery costs

PCE-G28 is a portable, handheld electromagnetic field meter or gauss meter that detects electromagnetic fields (EMFs) and displays measurement results in milliGauss (mG) or microTesla (µT). This EMF radiation detector comes with an external 3-axis electromagnetic sensor (X, Y, Z direction).


  • Measurement range: 0 … 20000 mG / 0 … 2000 µT
  • Accuracy: ± 4% + 3 digits / ± 5% + 3 digits / ± 10% + 5 digits
  • Resolution: 0.1 mG / 0.01 µT


Electromagnetic Field Radiation Detector PCE-G28
US$ 432.00
ex. VAT, ex. delivery costs

PCE-G28 is a portable, handheld electromagnetic field radiation detector or gauss meter that detects electromagnetic fields (EMFs) and displays measurement results in milliGauss (mG) or microTesla (µT). This EMF radiation detector comes with an external 3-axis electromagnetic sensor (X, Y, Z direction).


  • Measurement range: 0 … 20000 mG / 0 … 2000 µT
  • Accuracy: ± 4% + 3 digits / ± 5% + 3 digits / ± 10% + 5 digits
  • Resolution: 0.1 mG / 0.01 µT


Environmental Electromagnetic Field Radiation Tester PCE-G28
US$ 432.00
ex. VAT, ex. delivery costs

PCE-G28 is a portable, handheld environmental electromagnetic field radiation tester or gauss meter that detects electromagnetic fields (EMFs) and displays measurement results in milliGauss (mG) or microTesla (µT). This EMF radiation detector comes with an external 3-axis electromagnetic sensor (X, Y, Z direction).


  • Measurement range: 0 … 20000 mG / 0 … 2000 µT
  • Accuracy: ± 4% + 3 digits / ± 5% + 3 digits / ± 10% + 5 digits
  • Resolution: 0.1 mG / 0.01 µT


Environmental Tester PCE-WS CR
US$ 426.00
ex. VAT, ex. delivery costs
The Environmental Tester for air flow impresses with its compact design and various output signals. The  Environmental Tester can be used for applications in warning technology, building automation and home technology.

  • Measuring range: 0.8 m/s … 50 m/s
  • Measurement from: ≤0.8 m/s
  • Output:  Adjustable relay
  • IP 54 protection
  • mA, V, pulse or Modbus output
Environmental Tester PCE-007
US$ 425.00
ex. VAT, ex. delivery costs

Environmental tester with port, memory, software for wind speed, temperature and air flow. These test instruments are calibrated by the manufacturer. An ISO calibration certificate is available as an option.

  • Speed measurement up to 45 m/s or 100 mph
  • Wind speed: 0.01 m/s, accuracy ±3% ±0.1
  • Air temperature: 0.2°C / 32.4°F, accuracy ±1°C / 33.8°F
  • Air flow: 0.001 to 100, accuracy calculated from the wind speed and surface

Environmental Tester PCE-228HTE-ICA incl. ISO Calibration Certificate
US$ 509.00
ex. VAT, ex. delivery costs
ISO Calibration

The environmental tester PCE-228HTE is a mobile device for measuring pH, mV, °C and °F, complete with SD card memory and an RS-232 interface. This particular model includes a special pH electrode suitable for temperatures up to 100°C / 212°F.


  • Measurement range: 0.00 … 14.00 pH
  • Resolution: 0.01 pH
  • Accuracy: ±(0.02 pH + 2 digits)
  • Memory: flexible via SD card memory 1 … 16 GB
  • Interface: RS-232
  • Incl. special pH electrode: for temperatures to 100°C / 212°F
  • Incl. ISO Calibration Certificate

Water Analysis Meter PCE-228HTE-ICA incl. ISO Calibration Certificate
US$ 509.00
ex. VAT, ex. delivery costs
ISO Calibration

The Water Analysis Meter PCE-228HTE is a mobile device for measuring pH, mV, °C and °F, complete with SD card memory and an RS-232 interface. This particular model includes a special pH electrode suitable for temperatures up to 100°C / 212°F.


  • Measurement range: 0.00 … 14.00 pH
  • Resolution: 0.01 pH
  • Accuracy: ± (0.02 pH + 2 digits)
  • Memory: flexible via SD card memory 1 … 16 GB
  • Interface: RS-232
  • Incl. special pH electrode: for temperatures to 100°C / 212°F
  • Incl. ISO Calibration Certificate

Water Analysis Meter PCE-228-R
US$ 502.00
ex. VAT, ex. delivery costs

The PCE-288-R Water Analysis Meter or Redox Meter is a very easy to use meter to measure mV / pH / ºC. In the PCE-228-R Redox Meter, values can be directly stored in the SD memory card (Excel format) or can be directly transferred in real time to a PC or laptop by means of the RS-232 interface.


  • Good quality at an affordable price
  • SD memory card (1 … 16 GB)
  • Values are directly stored in Excel format in the SD memory card (any  additional software is required)
  • RS-232 interface for real-time data transfer

Relative Humidity Meter PCE-320
US$ 442.00
ex. VAT, ex. delivery costs

With the relative humidity meter it is possible to measure climate conditions such as temperature and relative humidity, as well as determining surface temperature of objects simultaneously by using the included external temperature sensor or using an infrared measurement. The relative humidity meter offers features such as average value, maximum, minimum, and hold functions at a reasonable price.

  • Internal probe
  • Temperature: -20°C … 60°C / -4 … 140°F
  • Relative humidity: 10 … 90% r.H.
  • Temperature of global: -22°C … 60°C / -8 … 140°F
  • Humidity: -68°C … 60°C / -90 … 140°F
  • Dew point temperature: depending on the sensor

  • External probe
  • Temperature: -50° C … 500° C / -58 … 932°F

Environmental Tester PCE-P05 Differential Pressure + ISO calibration certificate
US$ 494.00
ex. VAT, ex. delivery costs
ISO Calibration
The environmental tester is a robust, compact and comprehensive differential pressure measuring device for measuring pressure in 11 adjustable units. The environmental differential pressure tester is particularly suitable for the complete documentation of your measuring tasks.

  • Measuring range from -344 … +344 mbar
  • Parameters:
    inH2O, psi, mbar, kPa, inHg, mmHg,
       ozin², ftH2O, cmH2O, kgcm², bar
  • Backlight can be switched on/off
  • Software with USB cable included
  • Incl. ISO calibration certificate
Environmental Tester PCE-LMD 5-ICA incl. ISO Calibration Certificate
US$ 484.00
ex. VAT, ex. delivery costs
ISO Calibration
The environmental tester has a large measuring range of 0 … 400 kLux. The illuminance is measured using an external silicon photodiode with a spectral filter. This means that the environmental tester can be positioned appropriately for every measuring task.

  • Measuring range: 1000 … 400,000 lux
  • Resolution: 0.1 lux
  • Lux and footcandle units
  • Rechargeable battery
  • incl. ISO Calibration Certificate
Light Meter PCE-UV 50
US$ 482.00
ex. VAT, ex. delivery costs
The Light Meter is a precise measuring instrument for simultaneously recording UV irradiance, UV energy and temperature. With its wavelength range of 340 nm ...420 nm, our Light Meter is ideal for applications in UV curing systems, UV dryers, UV LED light sources and exposure machines as well as for quality assurance in industrial UV processes.
<50mW/cm²: ±5 mW/cm², >50 mW/cm²: ± 10% v.Mw.

  • UV irradiance: 0 ... 40000 mW/cm²
  • Resolution: 1 mW/cm²
  • Accuracy: <50mW/cm²: ±5 mW/cm², >50 mW/cm²: ± 10% v.Mw.
  • UV energy: 0 ... 999999 mJ/cm²
  • Temperature measuring range: -55 ... 125°C / -67 ... 257°F
  • Resolution: 0.1°C / 1.8°F
  • Standards: JJG 879-2015, QB/T 2826-2017
  • Spectral range: 340 ... 420 nm (UVA)
  • Use e.g. in UV curing, UV light sources
Environmental Tester PCE-P01-ICA Differential Pressure Incl. ISO Certificate
US$ 471.00
ex. VAT, ex. delivery costs
ISO Calibration
The environmental tester differential pressure is a robust, compact and comprehensive differential pressure measuring device for measuring pressure in 11 adjustable units. The environmental tester is particularly suitable for the complete documentation of your measuring tasks.

  • Measurement of differential pressure and relative pressure
  • 11 selectable units: mbar, bar, psi, kPa, …
  • Measuring range from -140 to +140 mbar
  • Min / max and average value display directly on the display
  • USB interface
  • Incl. ISO calibration certificate
Relative Humidity Meter PCE-HT110-ICA incl. ISO Calibration Certificate
US$ 513.00
ex. VAT, ex. delivery costs
ISO Calibration

The PCE-HT110 Relative Humidity Meter or Humidity Detector precisely measures air temperature and relative humidity. This accurate and reliable device shows the current measurements on the large LCD display and saves the measurement data directly to an SD card (included). The PCE-HT110 is equipped with two channels, accommodates an SD card memory of up to 16 GB, offers an adjustable measurement rate / sampling interval, and includes a wall mount, making the device ideal for logging data over an extended period of time.


  • Measurement ranges: 0 … 50°C / 32 … 122°F, 10 … 90% RH
  • Resolution: 0.1°C / 0.18°F, 0.1% RH
  • Data format: .XLS (compatible with Microsoft Excel)
  • Incl. ISO Calibration Certificate

Environmental Tester PCE-AC 2000
US$ 466.00
ex. VAT, ex. delivery costs

The innovatively designed environmental tester is a large display for monitoring the indoor air quality. This environmental tester is used specifically to monitor the indoor air quality in large rooms. These include, for example, meeting rooms, lounges, offices or public spaces such as classrooms or kindergartens.

  • Measuring range CO2: 0 … 9999 ppm
  • Temperature measuring range: -10.0 … 100.0 °C
  • Humidity measuring range: 0 … 99% r.h.
  • Traffic light bar graph
  • Acoustic, adjustable alarm