Data Loggers

A data logger is a compact, battery powered device equipped with an internal microprocessor, data storage and one or more sensors. They can be deployed in a variety of environments to record measurements at set intervals. The devices automatically monitor and record environmental parameters over time, allowing conditions to be measured, documented, analysed and validated. The data logger contains a sensor to receive the information and a computer chip to store it. Then the information stored in the data logger is transferred to a computer for analysis.

Depending on the particular data logger, measurements can include air temperature, relative humidity, AC/DC current and voltage, differential pressure, time-of-use (lights, motors, etc.), light intensity, water temperature, water level, dissolved oxygen, soil moisture, rainfall, wind speed and direction, leaf wetness, pulse signals, room occupancy, plug load, and many more.
Why would you use a data logger?

Data logging is the collection of data over a period of time, and is something often used in scientific experiments. Data logging systems typically monitor a process using sensors linked to a computer. Most data logging can be done automatically under computer control.

Sensors have an important role in the data logging process. All physical properties can be measured with sensors such as light, heat, sound, pressure, acidity and humidity.
The sensors send signals to an interface box, which is linked to a computer. The interface box converts analogue signals to digital signals that the computer can understand.
The computer controlling the process will take readings at regular intervals. The time interval for data logging is the time between readings. The logging period is the total length of time over which readings are taken.
The readings are stored in tables and can be displayed in graphs or passed to an application for analysis.
Sometimes it is necessary to record data 'out in the field'. This is called remote data logging. Readings are stored and brought back to a computer where they are downloaded and analysed. The equipment in these situations needs to be very robust. For example equipment used to monitor water levels would have to be waterproof and equipment working in a satellite would have to be able to withstand vibration during launch and recovery.

How do you use a Data Logger?
● Download and install software on mobile device or laptop
● Connect to data logger and launch parameters
● Place in location and record data for desired period of time
● Reconnect to data logger via mobile device or laptop
● Download data file and readout with analysis software
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Part Details Brand Measurement Parameters Sensor Type Number Of Input Channels Interface Type Maximum Voltage Measurement Maximum Temperature Measurement Power Source Best Temperature Measurement Accuracy IP Rating Minimum Operating Temperature Maximum Operating Temperature Maximum Current Measurement Display Type Model Number p Dimensions Includes Length Width Height Weight Battery Life Number Of Readings Per Channel Battery Type Best Humidity Measurement Accuracy Temperature Measurement Resolution Best Voltage Measurement Accuracy Humidity Measurement Resolution Diameter Best Current Measurement Accuracy Voltage Measurement Resolution Maximum Humidity Measurement Current Measurement Resolution Plug Type Alarm
Lascar Dew Point, Humidity, Temperature Data Logger, Battery Powered, LCD Display Lascar Dew Point, Humidity, Temperature Humidity, Temperature 2 - - +80 °C Battery ±0.3 °C - - - - LCD - 61 x 33 x 100mm External Probe 61mm 33mm 100mm - 1 yr - 1/2 AA ±2.05 %RH 0.1°C - 0.1%RH - - - 100%RH - USB Yes
Graphtec GL240 Data Logger, Maximum Voltage Measurement 100V, Battery, Mains Powered, TFT LCD Display Graphtec - - 10 - 100V 1100 (Type J) °C, 1300 (Type N) °C, 1370 (Type K) °C, 1600 (Type R) °C, 1760 (Type S) °C, 1820 (Type B) °C, 2000 (Type W) °C, 400 (Type T) °C, 800 (Type E) °C Battery, Mains ±0.1 + 0.5 °C (Type T) %, ±0.1 + 1 °C (Type N) %, ±0.1 + 1.5 °C (Type W) %, ±0.5 + 1 °C (Type E) %, ±0.5 + 1 °C (Type J) %, ±0.5 + 1 °C (Type K) %, ±0.5 + 2 °C (Type B) %, ±0.5 + 2 °C (Type R) %, ±0.5 + 2 °C (Type S) % - -25°C +85°C - TFT LCD GL240 194 x 121 x 46 (with Cover)mm - 194mm 121mm 46mm 634g - 1000 Lithium ±3 %RH 0.1°C ±0.1 % 0.1% - - 0.01V 100%RH - - Yes
Graphtec GL840 Data Logger, Maximum Voltage Measurement 100V, Maximum Current Measurement 200A Graphtec - - 20 - 100V 1100 (Type J) °C, 1300 (Type N) °C, 1370 (Type K) °C, 1600 (Type R) °C, 1760 (Type S) °C, 1820 (Type B) °C, 2000 (Type W) °C, 400 (Type T) °C, 800 (Type E) °C Battery, Mains ±0.1 + 0.5 °C (Type T) %, ±0.1 + 1 °C (Type N) %, ±0.1 + 1.5 °C (Type W) %, ±0.5 + 1 °C (Type E) %, ±0.5 + 1 °C (Type J) %, ±0.5 + 1 °C (Type K) %, ±0.5 + 2 °C (Type B) %, ±0.5 + 2 °C (Type R) %, ±0.5 + 2 °C (Type S) % - -25°C +85°C 200A TFT LCD GL840 246 x 161 x 58.2 (with Cover)mm - 246mm 161mm 58.2mm 1218g - 1000 Lithium ±3 %RH 0.1°C ±0.1 % 0.1% - - 0.01V 100%RH - - Yes
Graphtec GL840 Data Logger, Maximum Voltage Measurement 100V, Maximum Current Measurement 200A Graphtec - - 20 - 100V 1100 (Type J) °C, 1300 (Type N) °C, 1370 (Type K) °C, 1600 (Type R) °C, 1760 (Type S) °C, 1820 (Type B) °C, 2000 (Type W) °C, 400 (Type T) °C, 800 (Type E) °C Battery, Mains ±0.1 + 0.5 °C (Type T) %, ±0.1 + 1 °C (Type N) %, ±0.1 + 1.5 °C (Type W) %, ±0.5 + 1 °C (Type E) %, ±0.5 + 1 °C (Type J) %, ±0.5 + 1 °C (Type K) %, ±0.5 + 2 °C (Type B) %, ±0.5 + 2 °C (Type R) %, ±0.5 + 2 °C (Type S) % - -25°C +85°C 200A TFT LCD GL840 246 x 161 x 58.2 (with Cover)mm - 246mm 161mm 58.2mm 1218g - 1000 Lithium ±3 %RH 0.1°C ±0.1 % 0.1% - - 0.01V 100%RH - - Yes
Lascar EL-USB-2 Dew Point, Humidity, Temperature Data Logger, USB, Battery Powered, IP67 Lascar Dew Point, Humidity, Temperature - - USB - +80 °C Battery ± 0.55 °C IP67 -35°C +80°C - - EL-USB-2 108 x 25 x 22mm Battery 25mm 108mm - - 3 yr 16382 1/2 AA ± 2.25 %RH 0.5°C - 0.5%RH 22mm - - 100%RH - - Yes
Lascar EL-USB-1 Temperature Data Logger, USB, Battery Powered, IP67 Lascar Temperature Temperature - USB - +80 °C Battery ± 0.5 °C IP67 -35°C +80°C - - EL-USB-1 26.8 (Dia.) x 98mm 1/2 AA battery and wall mount clip 98mm 26mm 26.8mm - 3 yr 16382 1/2 AA - 0.5 °C, 1 °F - - 26.8mm - - - - - Yes
Lascar EL-USB-LITE Temperature Data Logger, USB, Battery Powered Lascar Temperature - - USB - +50 °C Battery ±2.5 °C - -10°C +50°C - - EL-USB-LITE - Battery 68mm 18.5mm - - 1 month 4080 CR1620 Lithium Coin Cell - 1 °C, 2 °F - - - - - - - - Yes
RS PRO Temperature Data Logger, Wi-Fi, Battery Powered, IP67 RS Pro Temperature External Thermistor 1 Wi-Fi - +125 °C Battery ±0.8 °C IP67 -40°C +125°C - - - 93 x 93 x 32mm Short External Thermistor Probe 93mm - 32mm - 2 yr - - - - - - - - - - - - Yes
RS PRO Temperature Data Logger, Wi-Fi, Battery Powered, IP67 RS Pro Temperature Temperature 1 Wi-Fi - +60 °C Battery ±0.5 °C IP67 -20°C +60°C - - - 93 x 93 x 32mm Short External Thermistor Probe 93mm - 32mm - 2 yr - - - - - - - - - - - - Yes
pico Technology USB TC-08 Temperature Data Logger, USB, Mains Powered pico Technology Temperature B, E, J, K, N, R, S, T 8 USB - +1200 (J) °C, +1300 (N) °C, +1370 (K) °C, +1760 (S) °C, +1820 (B) °C, +400 (T) °C, +910 (E) °C Mains ±0.2 % - - - - - USB TC-08 201 x 104 x 34mm Software 201mm 104mm 34mm - - - - - 0.025°C - - - - - - - - Yes
RS PRO Humidity, Temperature Data Logger, Wi-Fi, Battery Powered, IP67 RS Pro Humidity, Temperature Humidity, Temperature 1 Wi-Fi - +80 °C Battery ±0.3 °C IP67 -30°C +80°C - - - 93 x 93 x 32mm Short External Thermistor/RH Probe 93mm - 32mm - 2 yr - - ±2 RH % - - - - - - 100%RH - - Yes
RS PRO RS-91 Humidity, Temperature Data Logger, Bluetooth, LCD Display RS Pro Humidity, Temperature - - Bluetooth - +60 °C - ±0.5 °C - - - - LCD RS-91 - - - - - - - - - ±3 %RH 0.1°C - 0.1%RH - - - 100%RH - - -
Lascar EL-USB-2-LCD Dew Point, Humidity, Temperature Data Logger, USB, Battery Powered, LCD Display, IP67 Lascar Dew Point, Humidity, Temperature Dew Point, Humidity, Temperature - USB - +80 °C Battery ± 0.55 °C IP67 -35°C +80°C - LCD EL-USB-2-LCD 25.3 (Dia.) x 126mm 1/2 AA battery and wall mount clip 126mm 25.3mm - - 2 yr 16379 1/2 AA ± 2.25 %RH 0.5 °C, 1 °F - 0.5%RH 25.3mm - - 100%RH - - Yes
Lascar EL-USB-3 Voltage Data Logger, Maximum Voltage Measurement 30V dc, USB, Battery Powered Lascar Voltage - - USB 30V dc - Battery - - -35°C +80°C - - EL-USB-3 26.8 (Dia.) x 98mm Battery 98mm - - - 3 yr 32510 1/2 AA Lithium - - ±1 % - 26.8mm - 50mV dc - - - Yes
Lascar EL-USB-4 Current Data Logger, Maximum Current Measurement 20mA dc, USB, Battery Powered Lascar Current - - USB - - Battery - - -35°C +80°C 20mA dc - EL-USB-4 98 x 26.8 x 26.8mm Battery 26.8mm 98mm - - 3 yr 32000 1/2 AA - - - - 26.8mm ±1 % - - 0.05 mA dc - Yes
Lascar EL-USB-1-LCD Temperature Data Logger, USB, Battery Powered, LCD Display, IP67 Lascar Temperature - - USB - +80 °C Battery ± 0.5 °C IP67 -20°C +80°C - LCD EL-USB-1-LCD 120 x 25 x 22mm 1/2 AA battery and wall mount clip 25mm 120mm - - 2 yr 32510 1/2 AA battery - 0.5°C - - 22mm - - - - - Yes
Lascar EL-USB-2-LCD+ Dew Point, Humidity, Temperature Data Logger, USB, Battery Powered, LCD Display, IP67 Lascar Dew Point, Humidity, Temperature Dew Point, Humidity, Temperature - USB - +80 °C Battery ± 0.45 °C IP67 -35°C +80°C - LCD EL-USB-2-LCD+ 25.3 (Dia.) x 126mm 1/2 AA battery and wall mount clip 126mm - - - 2 yr 16379 1/2 AA ± 2.05 %RH 0.5 °C, 1 °F - 0.5%RH 25.3mm - - 100%RH - - Yes
Lascar EL-USB-TC Temperature Data Logger, USB, Battery Powered Lascar Temperature J, K, T - USB - +1190 (J) °C, +1350 (K) °C, +390 (T) °C Battery ±1 °C - -10°C +40°C - - EL-USB-TC 26.5 (Dia.) x 118mm Battery 118mm 26.5mm - - 2 yr 32510 1/2 AA - 0.5 °C, 1 °F - - 26.5mm - - - - - Yes
Tinytag TGU-4500 Humidity, Temperature Data Logger, Serial, USB, Battery Powered, IP53 Gemini Humidity, Temperature Capacitive, NTC 2 Serial, USB - +85 °C Battery ±0.6 °C IP53 -40°C +85°C - - TGU-4500 72 x 60 x 33mm Battery 72mm 60mm 33mm 55g 2 yr 32000 1/2 AA ±3 %RH 0.01°C - 0.3%RH - - - 95%RH - - Yes
Tinytag TK-4023 Temperature Data Logger, Serial, USB, Battery Powered, IP30 Gemini Temperature NTC 1 Serial, USB - +125 °C Battery ±0.4 °C IP30 -40°C +85°C - - TK-4023 34 (Dia.) x 54mm Battery 54mm - - 30g 2 yr 16000 1/2 AA - 0.05°C - - 34mm - - - - - Yes
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