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Data Logger / Data Logging Instrument

Data Logger GS 2
£ 400.00
Price excl. VAT &. delivery

Data Logger with acoustic signal, internal memory and software.


  • Measurement ranges: 0.01 µSv / h - 1000 µSv / h
  • Radiation detector: Geiger-Müller counting tub
  • Internal memory: 2 KB
  • Radiation types: Alpha 4 MeV, Beta 0.2 MeV, Gamma 0.02 MeV

Sound Level Data Logger PCE-322ALEQ
£ 403.00
Price excl. VAT &. delivery
Topseller
The sound level data logger PCE-322ALEQ is particularly suitable for measuring noise in the field of industrial, health, safety and environmental monitoring. The PCE-322ALEQ sound level data logger has a logger function, which allows storage of up to 32700 readings.


  • Automatic range: 30 … 130 dB
  • Manual range: 30 … 80 / 50 … 100 / 80 … 130 dB
  • Resolution: 0.1 dB
  • Accuracy: ±1.4 dB
  • Memory capacity: 32700 values
  • incl. software for LEQ calculationImportant! The LEQ value is only calculated by the software after the data transfer from the device to the PC or laptop.

CO2 Data Logger PCE-AQD 10
£ 405.00
Price excl. VAT &. delivery
The CO2 data logger PCE-AQD 10 is used to measure air quality. The CO2 data logger measures carbon dioxide, temperature and humidity. The CO2 sensor from the CO2 data logger is disconnected from the main unit with a connection cable.

  • Measuring range: 0 … 4000 ppm
  • Measuring range: 10 … 90% rh
  • Measuring range: 0 … 50°C / 32 … 122°F
  • Memory on SD card
  • 3 parameters of air quality
  • CO2, air temperature and humidity
pH / Conductivity / Salt / Oxygen Water Quality Data Logger PCE-PHD 1
£ 406.00
Price excl. VAT &. delivery

The PCE-PHD 1 pH / Conductivity / Salt / Oxygen Water Quality Data Logger is a portable and effective measuring device with multiple capabilities for inspecting water quality. Offering extraordinary precision at an affordable price, the data logger is used for laboratory and in situ testing of the pH value, redox, conductivity, salt content, oxygen level and temperature of water.


  • Parameter: pH, Redox, Conductivity, TDS, Salt, Oxygen, Temperature
  • Automatic temperature compensation
  • Sampling rate of 1 sec.
  • SD card memory (16 GB max.)
  • Interface: RS-232
  • 3 point calibration
  • Electrodes for pH and conductivity included

Redox Meter PCE-PHD 1-R
£ 406.00
Price excl. VAT &. delivery

The redox meter PCE-PHD 1-R is a multifunction meter for checking water quality. The portable redox meter is very well suited for controlling the redox value in water.


  • Redox:1999 … 0 … 1999 mV
  • Real-time data logger
  • SD card memory (16 GB max.)
  • RS-232 interface for online data transmission
  • BNC connector
  • Electrode for redox included

Sound Level Data Logger PCE-SLD 10-ICA Incl. ISO Calibration Certificate
£ 406.00
Price excl. VAT &. delivery
ISO Calibration
The sound level data logger PCE-SLD 10 is used for permanent monitoring of the sound level. In addition to storing the measured values, the PCE-SLD 10 sound level data logger is able to display the measured values ​​on a display and output them as a 4 … 20-mA analog value.

  • Measuring range: 30 … 130 dB
  • Measurement accuracy: Based on class 2 according to IEC61672
  • Resolution: 0.1 dB
  • LC display
  • SD card memory up to 16 GB
  • External microphone
  • Analog output with 4 … 20-mA
  • Incl. ISO calibration certificate
Humidity/Temp Data Logger PCE-313A-ICA incl. ISO Calibration Certificate
£ 414.00
Price excl. VAT &. delivery
ISO Calibration

The PCE-313A Humidity/Temp Data Logger measures relative humidity and temperature and can be used in the air-conditioning sector. The PCE-313A Humidity/Temp Data Logger can be connected to type K thermo-elements to detect, for instance, the temperature of a wall by means of a surface probe. The internal memory of this test equipment allows the Humidity/Temp Data Logger to record humidity and temperature data at an adjustable measurement interval. Thanks to its SD memory card (1 to 16 GB) the humidity test instrument can be used for long term data acquisition.


  • Relative humidity: 5 … 95% r.H.
  • Temperature: 0 … 50°C / 32 … 122°F
  • Type K: -50 … 1300°C / -58 … 2372°F
  • Calculated dew point: -25.3 … 48.9°C / -13.5 … 120°F
  • Wet bulb temperature: -21 … 50°C / -5.8 … 122°F
  • Memory: SD card (1 … 16 GB)
  • Incl. ISO Calibration Certificate
Temperature Data Logger PCE-HT 300
£ 415.00
Price excl. VAT &. delivery
The temperature data logger PCE-HT 300 is a laboratory data logger for temperature, dew point and humidity. The temperature data logger stores the measurement data on an internal 16 GB memory in CSV format. 

Measuring function
  • Temperature: -10 … 80°C / 14 … 176°F
  • Dew point: -10 … 80°C / 14 … 176°F
  • Humidity: 0 … 100% RH
  • 16 GB of memory
  • Storage as CSV
Air Velocity / Temperature Data Logger incl. ISO Cal Certificate PCE-007-ICA
£ 423.00
Price excl. VAT &. delivery
ISO Calibration

This Data Logger meter is very economical. With this Data Logger meter you can measure wind speed and air temperature.

  • 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
  • Incl. ISO calibration certificate

CO2 Data Logger / Room Climate Data Logger PCE-RCM 12
£ 427.00
Price excl. VAT &. delivery
The CO2 data logger PCE-RCM 12 is used for indicative testing of environmental parameters. The CO2 data logger PCE-RCM 12 enables the measurement of CO2, fine dust, temperature and relative humidity. The bright display of the CO2 data logger provides information about these parameters. 


  • Fine dust, CO2, formaldehyde, humidity, temperature
  • Particle size channels: PM 2.5 / PM 10
  • Temperature measuring range: -20 … 70°C / -4 … 158°F
  • Humidity measuring range: 0 … 100% r.H.
  • Formaldehyde measuring range: 0.00 … 5.00 mg/m³
  • CO2 measuring range: 0 … 9999 ppm
  • For indicative measurements
Dissolved Oxygen Data-Logging Meter PCE-PHD 1-O2
£ 429.00
Price excl. VAT &. delivery

The Dissolved Oxygen Data-Logging Meter PCE-PHD 1-O2 is a true all-rounder for checking the water quality. The portable oxygen meter is used to control the water parameters pH (optional), temperature (optional), conductivity (optional), salinity (optional) and oxygen.


  • Oxygen: 0 … 20 mg / l
  • Real-time data logger
  • SD card memory (16 GB max.)
  • Manual or automatic temperature compensation
  • BNC connector
  • Suitable for laboratory and on-site measurement
  • Electrode for oxygen included

pH / Cond. / Salt / Oxygen Water Quality Data Logger PCE-PHD 1-ICA incl. ISO Cal
£ 436.00
Price excl. VAT &. delivery
ISO Calibration

The PCE-PHD 1-ICA pH / Conductivity / Salt / Oxygen Water Quality Data Logger is a portable and effective measuring device with multiple capabilities for inspecting water quality. Offering extraordinary precision at an affordable price, the data logger is used for laboratory and in situ testing of the pH value, redox, conductivity, salt content, oxygen level and temperature of water.


  • Parameter: pH, Redox, Conductivity, TDS, Salt, Oxygen, Temperature
  • Automatic temperature compensation
  • Sampling rate of 1 sec.
  • SD card memory (16 GB max.)
  • Interface: RS-232
  • 3 point calibration
  • Electrodes for pH and conductivity included
  • incl. ISO Calibration Certificate

Radiation Data Logger Gamma-Scout GS-Rechargeable
£ 436.00
Price excl. VAT &. delivery

The radiation data logger is a professional radiation meter for the very precise detection of alpha, beta and gamma radiation. This radiation data logger has a large measuring range and can be used for sporadic on-site measurements or for long-term measurements or monitoring.

  • Ranges: 0.01µSv/h…1000µSv/h
  • Detector: Geiger-Müller counter tube
  • Memory: 2kB
  • Including software, data cable and certificate
  • Rechargeable battery as a power source that is charged via USB (mains adapter or PC).

Sound Level Data Logger PCE-322ALEQ-ICA incl. ISO Calibration Certificate
£ 486.00
Price excl. VAT &. delivery
ISO Calibration
The sound level data logger PCE-322A is particularly suitable for measuring noise in the field of industrial, health, safety and environmental monitoring. The PCE-322A sound level data logger has a logger function, which allows storage of up to 32700 readings.


  • Automatic range: 30 … 130 dB
  • Manual range: 30 … 80 / 50 … 100 / 80 … 130 dB
  • Resolution: 0.1 dB
  • Accuracy: ±1.4 dB
  • Memory capacity: 32700 values
  • incl. software for LEQ calculation
  • incl. ISO calibration certificate Important! The LEQ value is only calculated by the software after the data transfer from the device to the PC or laptop.

Data Logger GS 3
£ 489.00
Price excl. VAT &. delivery

Data Logger with acoustic signal, internal memory and software.


  • Measurement ranges: 0.01 µSv / h - 1000 µSv / h
  • Radiation detector: Geiger-Muller counting tub
  • Internal memory: 2 KB
  • Radiation types: Alpha 4 MeV, Beta 0.2 MeV, Gamma 0.02 MeV.
  • Online, to transfer data to a PC , with pulse interval of 10, 30 or 60 sg
  • With additional alarm and acoustic pulse indicator

CO2 Data Logger PCE-AQD 10-ICA incl. ISO Calibration Certificate
£ 505.00
Price excl. VAT &. delivery
ISO Calibration
The CO2 data logger PCE-AQD 10-ICA is used to measure air quality. The CO2 data logger measures carbon dioxide, temperature and humidity. The CO2 sensor from the CO2 data logger is disconnected from the main unit with a connection cable.

  • Measuring range: 0 … 4000 ppm
  • Measuring range: 10 … 90% rh
  • Measuring range: 0 … 50°C / 32 … 122°F
  • Memory on SD card
  • 3 parameters of air quality
  • CO2, air temperature and humidity
  • incl. ISO Calibration Certificate (only for CO2)
Multifunction Wet Bulb Temperature Data Logger PCE-WB 20SD
£ 516.00
Price excl. VAT &. delivery

PCE-WB 20SD is a multifunction wet bulb temperature data logger used to measure indoor / outdoor wet bulb globe temperature (WBGT), black globe temperature (TG), wet bulb temperature (WB), dew point temperature, air temperature (TA) and relative humidity. Thus, this multipurpose data recording device is an ideal tool for evaluating heat stress risks in different work environments.


  • Programmable WBGT alarm setting with audible and visual alerts
  • Manual (push-button) or automatic (adjustable 1 … 3600 sec) sampling
  • SD card memory (1 … 16 GB) allows for quick and easy data transfer to a PC

pH / Conductivity / Salt / Oxygen Water Quality Data Logger PCE-PHD-1-KIT1
£ 532.00
Price excl. VAT &. delivery

The pH / Conductivity / Salt / Oxygen Water Quality Data Logger PCE-PHD-1-KIT1 is a true all-rounder for checking water quality. The portable data logger is used to control the water parameters pH, redox, conductivity, salinity, oxygen and is also very suitable for temperature measurement. Storage, electrolyte, conductance and calibration solutions are included in this comprehensive kit. 


  • Measuring range: pH value: 0.00 … 14.00 pH
  • Conductivity: 0 … 200 µS/cm, 0.2 … 2.0 mS/cm, 2 … 20.0 mS/cm, 20 … 200 mS/cm
  • TDS: 0 … 132 ppm, 132 … 1320 ppm, 1320 … 13200 ppm, 13200 … 132000 ppm
  • Oxygen: 0 … 20.0 mg/l 
  • Temperature: 0 … 60.0 °C / 32 … 140 ºF
  • 2 point calibration, pH4 + pH7
  • incl. Storage solution
  • incl. pH4 + pH7
  • incl. Electrolyte solution
  • incl. Conductance solution
  • incl. Carrying case

Three Phase Power Data Logger PCE-PA 7200
£ 584.00
Price excl. VAT &. delivery
Topseller
The three phase power data logger is a useful tool for the precise measurement of various electrical parameters. With a measuring range of up to 9999 kW for power and 0 to 1000 A for alternating current, it offers sufficient flexibility for various applications. The three phase power data logger offers a memory for 2000 measured values and data transfer to the software included in the scope of delivery.

  • AC voltage: 0 … 600 V
  • Resolution 0.1 V 
  • Accuracy ±1 % of Mw. ±5 digits
  • Alternating current: 0 … 1000 A
  • Resolution 0.1 A 
  • Accuracy 1.5 % v.Mw.
  • Active power
  • Power factor
  • Active energy
  • Frequency
  • Adjustable alarms
  • Memory and software
Data Logger PCE-MPC 15
£ 623.00
Price excl. VAT &. delivery

The data logger is used in offices, workshops or in laboratories to carry out indicative measurements of the environmental conditions. In addition to the number of particles, the data logger determines the mass concentration of PM2.5 and PM10 in the measuring range 0 … 1000 µg/m³.

  • Measurable particle sizes: PM2.5 / PM10
  • Particle sizes: 0.3 / 2.5 µm
  • Mass concentration
  • Particle counter
  • Temperature
  • Humidity (RH)
  • Flash memory for approx. 12 measurement runs

Data Logger PCE-PDA 1000L
£ 663.00
Price excl. VAT &. delivery

The data logger PCE-PDA 1000L measures the relative pressure on machines and systems. The relative pressure is measured by this data logger in the range between -100 … 2000 kPa. The data logger PCE-PDA 1000L has a quick coupling connection with which the air pressure or water pressure can be directly applied to the device.


  • Measuring range pressure: -100 … 2000 kPa relative / -14.5 … 290 PSI
  • Resolution: 0.01 kPa, 0.1 kPa
  • Accuracy: <± 0.5% of the measuring range
  • USB interface
  • Data logger
  • Adjustable measuring units: Pa, hPa, kPa, MPa, mbar, bar, ATM, kg / cm², mmH2O, cmH2O, inH2O, mmHg, inHg, Torr, PSI, PSF

dB Data Logger PCE-NDL 10
£ 663.00
Price excl. VAT &. delivery

The dB data logger is used to determine volume. The PCE-NDL 10 dB data logger is a handy measuring device that meets the highest requirements. In order to evaluate the measured data in the best possible way, it is possible to use the internal measurement data memory on the noise dosimeter. In addition, the dB data logger has an SD card slot that enables the use of an SD card as an additional storage medium.


  • Measuring range: SPL: Auto 30 … 130 dB
  • Resolution: 0.1 dB
  • Low sampling rate
  • Automatic or manual storage
  • Selectable storage interval
  • Backlit LC display
  • Dose measurement or SPL measurement

Vibration Data Logger PCE-VDR 10
£ 694.00
Price excl. VAT &. delivery

PCE-VDR 10 is a single-axis accelerometer or vibration data logger monitor with real-time measurement and data logging capabilities. This vibration data logger records acceleration (m/s, g, ft/s) as well as velocity (mm/s, cm/s, in/s) measurements and saves the measured data to an included SD card memory. There is also an analog output, which makes this vibration data logger compatlble with control systems.

  • Acceleration measuring range:   0.5 … 199.9 m/s, 0.05 … 20.39 g, 2 … 656 ft/s
  • Velocity measuring ranges:   0.5 … 199.9 mm/s, 0.05 … 19.99 cm/s, 0.02 … 7.87 in/s
  • Frequency range: 10 … 1000 Hz
  • Analog output: 4 … 20 mA
  • RS-232 and USB interface

CO2 Data Logger / Room Climate Data Logger PCE-AQD 20
£ 712.00
Price excl. VAT &. delivery
The CO2 data logger / room climate data logger PCE-AQD 20 is an ideal measuring device for monitoring the air quality at workplaces. The health and CO2 data logger is ideal for continuous logging of air temperature, humidity, CO2, PM2.5 and air pressure.

Measuring function
  • PM2.5
  • Humidity
  • Temperature
  • CO2
  • Air pressure
  • Memory: SD card max. 32 GB
  • Ideal for workplace monitoring
  • Alarm function
Data Logger PCE-MPC 20
£ 745.00
Price excl. VAT &. delivery
The Data Logger PCE-MPC 20 is a particle counter that measures the particles in the atmosphere. The measurable particle sizes in the particle collector are 0.3, 2.5 and 10 μm.

  • Measurable particle sizes: PM2.5 / PM10
  • Measuring range Mass concentration: 0 … 2000 μg / m³
  • Measurable particle sizes: 0.3, 2.5 and 10 μm
  • Display with graphic real-time diagram
  • Data memory up to 5000 data sets
Humidity / Temperature Data Logger Set PCE-HT 71N-10
£ 745.00
Price excl. VAT &. delivery

The PCE-HT 71N Data Logger detects air temperature and humidity and stores readings to its internal memory. This Data Logger is compact and has enough memory to store up to 32,000 readings, 16,000 for each parameter, and is used above all as a Data Logger, in supermarket refrigeration units, refrigerated transport, warehouses and other temperature controlled environments. These temperature and humidity logging test instruments are manufacturer calibrated. An ISO calibration certificate is an option.


  • Measurement range: 0 … 100% RH / -35 … 80°C / -31 … 176°F
  • Accuracy: ± 3% RH (20 … 80%) and  ± 5% / ± 1°C (1.8°F)
  • Resolution: 0.5% RH / 0.1°C (0.18°F)
  • Memory: Max. 32,000 measurement data (16,000 for each parameter (humidity / temperature))

CO2 / Room Climate Data Logger PCE-AQD 20-ICA Incl. ISO Calibration Certificate
£ 780.00
Price excl. VAT &. delivery
ISO Calibration
The CO2 / Room Climate Data Logger PCE-AQD 20 is an ideal measuring device for monitoring the air quality at workplaces. The health and CO2 data logger is ideal for continuous logging of air temperature, humidity, CO2, PM2.5 and air pressure.

Measuring function
  • PM2.5
  • Humidity
  • Temperature
  • CO2
  • Air pressure
  • Memory: SD card max. 32 GB
  • Ideal for workplace monitoring
  • Alarm function
  • Incl. ISO calibration certificate
dB Data Logger PCE-NDL 10-ICA incl. ISO Calibration Certificate
£ 797.00
Price excl. VAT &. delivery
ISO Calibration

The dB data logger is used to determine volume. The PCE-NDL 10 dB data logger is a handy measuring device that meets the highest requirements. In order to evaluate the measured data in the best possible way, it is possible to use the internal measurement data memory on the noise dosimeter. In addition, the dB data logger has an SD card slot that enables the use of an SD card as an additional storage medium.


  • Measuring range: SPL: Auto 30 … 130 dB
  • Resolution: 0.1 dB
  • Low sampling rate
  • Automatic or manual storage
  • Selectable storage interval
  • Backlit LC display
  • Dose measurement or SPL measurement

Power Data Logger PCE-GPA 62
£ 852.00
Price excl. VAT &. delivery

The power data logger (Graphic Power Quality Analyzer) PCE-GPA 62 is used for single-phase or three-phase measurements of the active, reactive and apparent power, power factor, phase angle, energy, voltage, current as well as peaks and harmonics.


  • Real-time test, register and measurement of voltage and current (real and effective) 
  • Measures power factor and phase angle, frequency, energy, active, reactive and apparent power   (single-phase or three-phase in symmetrical networks). 
  • Max. conductor diameter: 55 mm / 2.2 in
  • Records up to 50,000 records


Vibration Data Logger PCE-VDR 10-ICA incl. ISO Calibration Certificate
£ 860.00
Price excl. VAT &. delivery
ISO Calibration

PCE-VDR 10-ICA is a single-axis accelerometer or vibration data logger monitor with real-time measurement and data logging capabilities. This vibration data logger records acceleration (m/s, g, ft/s) as well as velocity (mm/s, cm/s, in/s) measurements and saves the measured data to an included SD card memory. There is also an analog output, which makes this vibration data logger compatlble with control systems.

  • Acceleration measuring range:   0.5 … 199.9 m/s, 0.05 … 20.39 g, 2 … 656 ft/s
  • Velocity measuring ranges:   0.5 … 199.9 mm/s, 0.05 … 19.99 cm/s, 0.02 … 7.87 in/s
  • Frequency range: 10 … 1000 Hz
  • Analog output: 4 … 20 mA
  • RS-232 and USB interface
  • incl. ISO Calibration Certificate

Data Logger PCE-PCO 1
£ 863.00
Price excl. VAT &. delivery
Topseller

PCE-PCO 1 is a handheld data logger for measuring the concentration of particles in the air. The PCE-PCO 1 data logger:


  • Measures 6 sizes of particles: 0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10 µm
  • Offers a robust, 80 MB internal memory
  • Features a large, full-color LCD display with backlight
  • Includes a built-in camera for image and video recording
  • Contains sensors for measuring air temperature, dew point and relative  humidity
  • Displays temperature in degrees Celsius (°C) or Fahrenheit (°F)

Power Data Logger PCE-GPA 62-ICA incl. ISO Calibration Certificate
£ 964.00
Price excl. VAT &. delivery
ISO Calibration

This power datalogger is used for single-phase or three-phase measurements of the active, reactive and apparent power, power factor, phase angle, energy, voltage, current as well as peaks and harmonics up to 50º of the harmonic waveform. The power analyzer clamp is equipped with data logger. The test instrument is delivered manufacturer ISO calibrated.

  • Real-time test, register and measurement of voltage and current (real and effective) 
  • Measures power factor and phase angle, frequency, energy, active, reactive and apparent power   (single-phase or three-phase in symmetrical networks). 
  • Max. conductor diameter: 55 mm / 2.2 in
  • Datalogger for 50,000 readings / software/ USB interface 
  • incl. ISO Calibration Certificate

Humidity / Temperature Data Logger Set PCE-HT110-5
£ 1,001.00
Price excl. VAT &. delivery

The PCE-HT110 Humidity / Temperature Data Logger 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)
  • Set = Quantity of 5 x units

Data Logger PCE-MPC 25
£ 1,023.00
Price excl. VAT &. delivery

The data logger is used in offices, workshops or in laboratories to carry out indicative measurements of the environmental conditions. In addition to the number of particles, the data logger determines the mass concentration of PM2.5 and PM10 in the measuring range 0 … 1000 µg/m³.

  • Measurable particle sizes: PM2.5 / PM10
  • Particle sizes: 0.3 / 0.5 / 1.0 / 2.5 / 5.0 and 10 µm
  • Mass concentration
  • Particle counter
  • Temperature
  • Humidity (RH)
  • Flash memory for approx. 12 measurement runs

Dew Point Data Logger PCE-DPM 3
£ 1,023.00
Price excl. VAT &. delivery
The dew point data logger is a mobile testing device for monitoring the quality of compressed air on stationary and mobile compressed air generators. This dew point data logger measures the temperature, the relative humidity, H2O and calculates the current dew point up to an ambient pressure of 20 bar.

  • Dew point, H2O, temperature, humidity measurement
  • Data memory for approx. 50,000 measurement data
  • CSV data export
  • With G1 / 2" connection thread
  • For inline measurement of pressure pipes
  • Sensor protected with a cap
  • Left connection has NO function
Sound Level Data Logger (Badge Type) PCE-MND 10
£ 1,023.00
Price excl. VAT &. delivery
The sound level data logger (badge type) was specially developed for measuring noise exposure in workplaces and complies with the IEC 61252:2002 standard. With a measuring range of 70 … 140 dB and a frequency weighting of A, B and Z, the sound level data logger is ideal for this.

  • Measuring range: 70 … 140 dB
  • Frequency weighting: A, B and Z
  • Battery life: >15 hours
  • LEQ measurement
  • Memory
  • USB interface
  • Battery / power supply
  • Software download
  • Standards: IEC 61252:2002, ANSI S1.25-1991