Products for 'health and safety'

£ 2,221.00

Price excl. VAT &. delivery

The Health & Safety is certified in accordance with IEC 61672-1:2013, Class 1 and is ideally suited for professional use in noise monitoring. With a wide frequency range from 10 Hz to 20 kHz and extensive filter options, the device enables precise measurements in almost all areas of application. The Health & Safety also impresses with its comprehensive connectivity: Ethernet, WiFi and USB Type-C enable flexible and uncomplicated data transfer.

Measuring range: 21 ... 143 dBA
Resolution: 0.1 dB
Class 1 accuracy IEC61672-1:2013
Frequency range: 10 Hz ... 20 kHz
Frequency weighting: A, C, Z
Time weighting: S, F, I
Ethernet, WiFi, USB Type-C
Internal memory: 8 GB
External SD card support: 32 GB / 64 GB
Measurement parameters: Lp, Lmax, Lmin, Leq, Lpeak
4-inch TFT touch display
PC software

Health & Safety PCE-SLM 50-ICA incl. ISO-Calibration Certificate

£ 2,306.00

Price excl. VAT &. delivery

Measuring range: 21 ... 143 dBA
Resolution: 0.1 dB
Class 1 accuracy IEC61672-1:2013
Frequency range: 10 Hz ... 20 kHz
Frequency weighting: A, C, Z
Time weighting: S, F, I
Ethernet, WiFi, USB Type-C
Internal memory: 8 GB
External SD card support: 32 GB / 64 GB
Measurement parameters: Lp, Lmax, Lmin, Leq, Lpeak
4-inch TFT touch display
PC software
incl. ISO-Calibration Certificate

Health & Safety PCE-PSM 10

£ 1,109.00

Price excl. VAT &. delivery

The Health & Safety has a measurement range of 0.1 to 200 kV and an accuracy of ±10 % and is a test device for detecting the electrostatic voltage on the surface of objects. It uses non-contact measurement technology to detect the electrostatic field. In addition, the Health & Safety has an earth connection to ensure proper earthing and therefore safety during use.

static charge: 0.1 ... 200 kV
resolution: 0.1 kV DC
accuracy: ±10 %
measuring function: hold
earth connection

Health & Safety Sound meter PCE-NSP 10

£ 739.00

Price excl. VAT &. delivery

Thanks to its large measurement range and versatile functions, our Health & Safety Sound meter is suitable for noise measurements in industry, the environment, occupational health and safety, at events and in research. The Health & Safety Sound meter records and visualises sound levels within a range from 20 to 130 dB in three manual measurement ranges and offers various measurement functions such as Hold, Max and Leq.

measurement range: 20 ... 130 dB
resolution: 0.1 dB
accuracy: ±1.5 dB
time weighting: F, S and I
Leq, 1/1 octave band, 1/3 octave band
frequency weighting: A, C and Z
frequency range: 20 ... 8000 Hz
standards: IEC 61672-1 (class II)

Health & Safety Sound meter PCE-ISM 10ILEQ

£ 616.00

Price excl. VAT &. delivery

Our Health & Safety Sound meter is specially designed to precisely detect and measure short, pulse-like noises such as explosions, blows or bangs. The Health & Safety Sound meter records sound levels within a range from 20 to 130 dB, with three manual measurement ranges available.

measurement range: 20 ... 130 dB
resolution: 0.1 dB
accuracy: ±1.5 dB
measurement functions: HOLD, MAX, LEQ
time weighting: F, S and I
frequency weighting: A, C and Z
frequency range: 20 ... 8000 Hz
standards: IEC 61672-1 (class II)

Health & Safety PCE-SRM 20

£ 485.00

Price excl. VAT &. delivery

Safeguarding sensitive electronic components in manufacturing and handling environments requires precise measurement technology. The Health & Safety is the indispensable, portable instrument for quickly and reliably checking the Health & Safety of materials in ESD-controlled areas. The Health & Safety is battery-operated and has integrated parallel electrodes that enable direct testing of the material Health & Safety.

Surface resistance: 10³ ... 10¹² Ω
Accuracy: 1/2 decade
Test voltages 10V and 100V
One-button operation
Incl. 2 electrodes
2 m / 6.6 ft test leads
Logarithmic scale
ANSI/ESD S20.20-2007

Health & Safety Sound Meter PCE-ISM 5

£ 522.00

Price excl. VAT &. delivery

Our Health & Safety Sound Meter is a versatile device that measures and evaluates the sound level time-dependently. The Health & Safety Sound Meter records and visualises sound levels within a range from 20 to 130 dB in three manual measurement ranges with a resolution of 0.1 dB.

measurement range: 20 ... 130 dB
accuracy: ±1.5 dB
time weighting: F, S and I
frequency range: 20 ... 8000 Hz
frequency weighting: A, C and Z
measuring function: HOLD
battery and mains operation
standards: IEC 61672-1 (Class II)

Health & Safety PCE-RAM 100

£ 407.00

Price excl. VAT &. delivery

The Health & Safety offers comprehensive measurement functions for α, β and γ radiation and is the test instrument of choice for professional radiation measurements. With the ability to precisely measure the accumulated radiation dose and count the radiation in both cps (counts per second) and cpm (counts per minute), the Health & Safety provides accurate and reliable measurement data at all times.

radiation: 0 µSv/h ... 9999.9 µSv/h
resolution: 0.001 µSv/h
accuracy: <10 % of Rd
units µSv and mrem
pulse counting in cps and cpm
32 GB memory with data logger
adjustable alarm

Health & Safety PCE-SRT 10

£ 388.00

Price excl. VAT &. delivery

The portable Health & Safety works on the principle of a two-point pin probe and enables simple and reliable measurement of the surface resistivity of materials without the need for a megohmmeter, electrometer or other high-voltage measuring devices. Thanks to its slim and handy design, the Health & Safety can be conveniently operated with one hand and is ideal for on-site testing or mobile use in production and laboratories

Resistance: 10³ ... 10¹² Ω
Accuracy: ±10% FS
Color-coded LED display
Compact and handy
Gold-plated electrode contacts
Automatic resistance measurement
Two-point pin probe technology

Health & Safety PCE-RAM 100-ICA incl. ISO-Calibration Certificate

£ 459.00

Price excl. VAT &. delivery

radiation: 0 µSv/h ... 9999.9 µSv/h
resolution: 0.001 µSv/h
accuracy: <10 % of Rd
units µSv and mrem
pulse counting in cps and cpm
32 GB memory with data logger
adjustable alarm
incl. ISO-Calibration Certificate

Health & Safety Sound Meter PCE-ASM 10

£ 242.00

Price excl. VAT &. delivery

Our Health & Safety Sound Meter is a precise and versatile device that measures and evaluates the sound level time-dependently. The Health & Safety Sound Meter offers three manual measurement ranges: 20 ... 90 dB, 40 ... 110 dB and 60 ... 130 dB, with a resolution of 0.1 dB.

measurement range: 20 ... 130 dB
accuracy: ±1.5 dB
time weighting: F and S
frequency weighting: A, C and Z
battery and mains operation
standards: IEC 61672-1 (class II)

Health & Safety PCE-WBGT 10

£ 123.00

Price excl. VAT &. delivery

The Health & Safety is used to assess heat stress in working environments, sports facilities or industrial plants. Our Health & Safety is used both indoors and outdoors to precisely measure climatic conditions and ensure the safety of people exposed to heat.

WBGT: 0 ... 50°C / 32 ... 122°F
Resolution: 0.1°C / 0.2°F
Spherical temperature (TG): -20 ... 125°C / -4 ... 257°F
Resolution: 0.1°C / 0.2°F
Air temperature (AIR): -20 ... 125°C / -4 ... 257°F
Resolution: 0.1°C / 0.2°F
Dew point (DP): -20 ... 60°C / -4 ... 140°F
Resolution: 0.1°C / 0.2°F
Wet bulb temperature (WB): -20 ... 60°C / -4 ... 140°F
Resolution: 0.1°C / 0.2°F
Humidity (RH%): 0 ... 100%
Resolution: 1%
Data logger: 8 MB
Data transfer: USB-C to PC

Health & Safety PCE-HAD 5

£ 117.00

Price excl. VAT &. delivery

Our Health & Safety is a versatile instrument for detecting halogen gases such as chlorine, fluorine, medical ethylene oxide, ethanol vapour and other refrigerants. It is used in fire extinguishing systems, air conditioning systems, refrigeration systems and refrigerant recovery systems to detect gases such as CFCs, HCFCs and HFCs. The Health & Safety offers precise measurement within the range of 0 ... 1000 ppm with a resolution of 1 ppm and a quick response time (T90) of below 30 seconds.

refrigerant gases CFC, HCFC and HFC
measurement range: 0 ... 1000 ppm
resolution: 1 ppm
accuracy: ±5 % FS
temperature: -10 ... +50 °C
resolution: 0.1 °C
accuracy ±1 °C
alarm: audible, visual, vibration

Health & Safety Sound Level Meter PCE-324

£ 67.00

Price excl. VAT &. delivery

The Health & Safety Sound Level Meter offers a wide measurement range of 30 to 130 dB (dBA) and 30 to 135 dB (dBC), making it suitable for accurate measurements in various acoustic environments. The accuracy of the device is ±1.5 dB at 94 dB @ 1 kHz and ±5 dB at 94 dB @ 8 kHz. Whether in residential areas, offices, production facilities or other environments, this Health & Safety Sound Level Meter is versatile and delivers accurate results in a wide range of acoustic scenarios.

accuracy class 2
automatic range: 30 ... 130 dB
manual ranges: 30 ... 80 / 60 ... 110 / 80 ... 130 dB
resolution: 0.1 dB
accuracy: ±1.5 dB (94 dB @1 kHz) / ±5 dB (94 dB @8 kHz)
frequency weighting A and C
numerical values and traffic light display

Health & Safety PCE-EMF 20

£ 32.00

Price excl. VAT &. delivery

The Health & Safety is a device for the simultaneous measurement of electric and magnetic fields, ideal for domestic use for testing routers, Bluetooth devices, radios, televisions, computers, printers, microwave ovens, refrigerators and mobile phone masts. The Health & Safety offers a measurement range from 1 to 1999 V/m for electric fields and from 0.01 to 99.99 µT for magnetic fields.

electric field: 1 ... 1999 V/m
resolution: 1 V/m
accuracy: 1 V/m
magnetic field: 0.01 ... 99.99 µT
resolution: 0.01 µT
accuracy: 0.01 µT
bandwidth: 5 Hz ... 3500 MHz
alarm threshold: 40 V/m, 4 µT

Food Safety / Hygiene - ATP Surface Test Instrument PCE-ATP 1

£ 1,183.00

Price excl. VAT &. delivery

PCE-ATP 1 is a food safety / hygiene - ATP test instrument, ATP meter, lumitester or luminometer used for surface testing. This luminometer allows for quick and easy first-generation adenosine triphosphate (ATP) testing and monitoring to ensure proper cleanliness, sterilization and sanitization. PCE-ATP 1 is an ATP tester that can be used for cleanliness control and documentation in many different applications.

Measurement range: 0 … 999,999 relative light units (RLUs)
Stores up to 10,000 date and time-stamped data records to internal memory
Enables rapid detection of bacterial or microbial residue

HVAC Meter PCE-VE 1500-60500

£ 17,377.00

Price excl. VAT &. delivery

With this HVAC meter, weld seams, wear and tear and damage can be assessed quickly and easily in order to make quick diagnoses. The sheathing of the endoscope cable from the HVAC meter consists of braided tungsten.

Diameter: Ø6mm / 0.23"
Cable length: 5m / 16.4 ft
Camera direction: 0°
Resolution: 1MP
Focusing range: 5 … 50 mm / 0.19 … 1.96"
7" touch screen for easy operation
replaceable battery with status display
Storage of recording on SD card
Motor with endoscope cable can be changed quickly
HDMI connection for direct image transmission

HVAC Meter PCE-VE 1500-60200

£ 14,885.00

Price excl. VAT &. delivery

Borescope camera cable length: 2 m / 6.5 ft
Cable diameter: 6mm / 0.23"
Direction of view of the camera frontal
Camera resolution 1 million pixels
Camera viewing angle 120°
Focusing distance 10 … 100 mm / 0.39 … 3.9"
Flexible camera head length 60 mm / 2.3"
Radius at 90° bend 50 mm / 1.9"
7" touch screen for easy operation
replaceable battery with status display
Storage of recording on SD card
Motor with endoscope cable can be changed quickly
HDMI connection for direct image transmission

Particle Counter PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Environmental Tester PCE-SLM 50

£ 2,221.00

Price excl. VAT &. delivery

The Environmental Tester is certified in accordance with IEC 61672-1:2013, Class 1 and is ideally suited for professional use in noise monitoring. With a wide frequency range from 10 Hz to 20 kHz and extensive filter options, the device enables precise measurements in almost all areas of application. The Environmental Tester also impresses with its comprehensive connectivity: Ethernet, WiFi and USB Type-C enable flexible and uncomplicated data transfer.

Measuring range: 21 ... 143 dBA
Resolution: 0.1 dB
Class 1 accuracy IEC61672-1:2013
Frequency range: 10 Hz ... 20 kHz
Frequency weighting: A, C, Z
Time weighting: S, F, I
Ethernet, WiFi, USB Type-C
Internal memory: 8 GB
External SD card support: 32 GB / 64 GB
Measurement parameters: Lp, Lmax, Lmin, Leq, Lpeak
4-inch TFT touch display
PC software

Food / Hygiene ATP Testing Meter PCE-ATP 1

£ 1,183.00

Price excl. VAT &. delivery

PCE-ATP 1 is a food safety / hygiene - ATP tester, ATP meter, lumitester or luminometer used for surface testing. This luminometer allows for quick and easy first-generation adenosine triphosphate (ATP) testing and monitoring to ensure proper cleanliness, sterilization and sanitization. PCE-ATP 1 is an ATP tester that can be used for cleanliness control and documentation in many different applications.

Measurement range: 0 … 999,999 relative light units (RLUs)
Stores up to 10,000 date- and time-stamped data records to internal memory
Enables rapid detection of bacterial or microbial residue

Luminometer PCE-ATP 1 KIT3 for surfaces and water

£ 1,655.00

Price excl. VAT &. delivery

The luminometer is used to quickly and easily check the cleanliness of surfaces and water. The luminometer displays a measurement result on the large LC display after only 10 seconds. Up to 10,000 measurement data sets with time and date can be stored on the internal memory of the ATP measuring device.

Measuring width: 0 … 999,999 RLU
Fast hygiene tests in just 10 seconds
USB and Bluetooth printer interface
Automatic calibration
For HACCP implementation
Data storage
Incl. 100 Test tubes (swabs) for surfaces
Incl. 100 Test tubes (swabs) for water

Food / Hygiene ATP Testing Meter PCE-ATP 1 KIT3 for surfaces and water

£ 1,655.00

Price excl. VAT &. delivery

The PCE-ATP 1-KIT3 is used to quickly and easily check the cleanliness of surfaces and water. The ATP Testing Meter displays a measurement result on the large LC display after only 10 seconds. Up to 10,000 measurement data sets with time and date can be stored on the internal memory of the ATP measuring device.

Measuring width: 0 … 999,999 RLU
Fast hygiene tests in just 10 seconds
USB and Bluetooth printer interface
Automatic calibration
For HACCP implementation
Data storage
Incl. 100 Test tubes (swabs) for surfaces
Incl. 100 Test tubes (swabs) for water

Dust Monitor PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

The PCE-PCO 2 is a portable handheld dust monitor used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this dust monitor also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Air Quality Particle Counting Meter PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld air quality particle counting meter or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Dust Particle Measuring Device PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld dust particle measuring device or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Air Quality Meter Gas-Pro-3

£ 1,890.00

Price excl. VAT &. delivery

This Air Quality Meter Gas-Pro-3 can gauge with its sensors a maximum of five different gases. Because of this versatility, the Air Quality Meter Gas-Pro-3 is ideal for use in a variety of applications, such as: near canals, sewage treatment plants, drains, wastewater facilities, dumps/landfills, chemical/oil plants, shipping ports and more.

Purpose: Personal protection
Sensor type: CO / CO2 / H2S / O2 / CH4
Memory: Yes
Interface: USB
Includes suction pump
Other gas sensors available upon request. Please email jmu@pce- instruments.com (UK) or rhe@pce-instruments.com (US) for details

Environmental Tester PCE-SLM 50-ICA incl. ISO-Calibration Certificate

£ 2,306.00

Price excl. VAT &. delivery

Measuring range: 21 ... 143 dBA
Resolution: 0.1 dB
Class 1 accuracy IEC61672-1:2013
Frequency range: 10 Hz ... 20 kHz
Frequency weighting: A, C, Z
Time weighting: S, F, I
Ethernet, WiFi, USB Type-C
Internal memory: 8 GB
External SD card support: 32 GB / 64 GB
Measurement parameters: Lp, Lmax, Lmin, Leq, Lpeak
4-inch TFT touch display
PC software
incl. ISO-Calibration Certificate

Aerosol particle counter PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld Aerosol particle counter or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Air Sampler PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld air sampler or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Data Logger PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld data logger used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this data logger also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

Hygiene Tester PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld Hygiene Tester or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels: PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

ATP Tester PCE-ATP 1

£ 1,183.00

Price excl. VAT &. delivery

Measurement range: 0 … 999,999 relative light units (RLUs)
Stores up to 10,000 date- and time-stamped data records to internal memory
Enables rapid detection of bacterial or microbial residue

Airborne Particle-Counting Hygiene Meter PCE-PCO 2

£ 1,034.00

Price excl. VAT &. delivery

PCE-PCO 2 is a portable handheld airborne particle-counting hygiene meter or particle counter used to monitor particulate matter (PM) concentrations in the air. Designed to aid in indoor air quality (IAQ) assessments, this particle counter also measures air temperature, dew point and relative humidity.

PM channels:PM 2.5, PM 10, including mass concentration mode (µg/m³)
Particle sizes (in micrometers): 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
Temp. measuring range: 0 … +50 °C / +32 … +122 °F
Humidity measuring range: 0 … 100 % RH
Built-in camera for image and video recording
Free software download on PCE Software web page

ATP Tester PCE-ATP 1 KIT

£ 1,433.00

Price excl. VAT &. delivery

The PCE-ATP 1-KIT is used to quickly and easily check the cleanliness of surfaces. The PCE-ATP 1 displays a measurement result on the large LC display after only 10 seconds. The PCE-ATP 1 internal memory stores up to 10,000 measured data sets with time and date.

Measuring width: 0 … 999,999 RLU
Fast hygiene tests in just 10 seconds
USB and Bluetooth printer interface
Automatic calibration
For HACCP implementation
Data storage
Enables rapid detection of bacterial or microbial residue
Incl. 100 Test tubes (swabs)

Luminometer PCE-ATP 1 KIT2 for water

£ 1,433.00

Price excl. VAT &. delivery

The PCE-ATP 1-KIT3 is used to quickly and easily check the cleanliness of water. The luminometer displays a measurement result on the large LC display after only 10 seconds. Up to 10,000 measurement data sets with time and date can be stored on the internal memory of the ATP measuring device.

Measuring width: 0 … 999,999 RLU
Fast hygiene tests in just 10 seconds
USB and Bluetooth printer interface
Automatic calibration
For HACCP implementation
Data storage
Incl. 100 Test tubes (swabs) for surfaces
Incl. 100 Test tubes (swabs) for water