DLG-87799_SD Professional Humidity and Temperature Meter Data Logger SD Memory Record External / Internal Sensor

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Model : DLG-87799_SD 

This advanced professional datalogger is standalone and measures and stores relative humidity (RH) and air temperature (TA) over 20%~90%RH and 0~50°C(internal sensor) and -10~70°C (external sensor probe [direct contact]) measurement ranges. It directly records data onto standard SD memory. Each data set includes temperature, RH, time and date. Data gathered are saved in .txt file, these preformatted data can be uploaded or paste to Excel directly. This well made unit is extremely accurate with fast response times. Also, it has 2 temperature sensors, built-in internal sensor (measures ambient temperature) and external sensor probe (measures temperatures in water or fridge, etc.). 


  • Reads humidity and air temperature
  • Parts and Sensor are made in Switzerland
  • Design with capacitance type RH sensor to get accurate and quick reading
  • Multiple & simultaneously display air temperature and humidity and Real-Time
  • Uses SD memory card data logging system for continuous recording
  • Dual Temperature Sensorbuilt-in internal sensor & external sensor probe
  • Highly accurate microcomputer circuit
  • User-programmable high & low alarm thresholds for humidity & air temperature
  • User-programmable sampling rate from 1min to 720min
  • Easy-to-read super big and high contrast LCD
  • 3 Warning Indicators should the temperature exceeds the set limits:Audible beep (can be turned off), alarm icon on the LCD & bright red led indicator
  • Battery low indicator
  • Temperature unit: °C & °F (switchable)
  • Max/Min value since power on function for easy data review
  • Fast response time, update value every 10sec.
  • Real time display in 24/12 hour format
  • Built-in tabletop/desktop stand and wall mount for long time monitoring
  • Long battery life (via alkaline battery)
    • without logging data: last for one year
    • with SD logging: last for one month (with approx. 1min interval)


  • Temperature
    • Range: 0~50°C (Display: -10~70°C)
    • Resolution: 0.1°C/°F
    • Accuracy: ±1°C
  • Humidity
    • Range: 20~90%RH (Display:0%~99.9%RH)
    • Resolution: 0.1%RH
    • Accuracy: ±5%RH (at 25°C, 10~90%RH, others ±7%RH)
  • External Temperature
    • Range: -10~70°C (Display: -30~70°C)
    • Resolution: 0.1°C/°F
    • Accuracy: ±0.6°C (0~50°C), ±1.2°C(-10~0°C, 50~70°C)
  • Accuracy: No specified for -30°C ~ -10°C
  • External Probe
    • Size: 4 x 25mm (DxL)
    • Cable: 2M long, material: PVC
  • SD Card
    • Capacity: Max. 2GB SD card or 4GB SDHC card (MMC & SDXC cards are not compatible)
    • Compatibility: FAT16 & FAT32
    • Maximum File size: 30,000 records
    • Maximum File size: automatic file creation once max file size is reached
    • Maximum File size: (a complete date/time/TA/RH%/TEMP is treated as 1 record)
  • Sampling Rate: 1 to 720 mins. Default:10 min
  • Beeper (dB): ~65dB
  • RH% Self Calibration: YES, via salt chamber
  • Power Consumption: <0.4mA
  • LCD Size: 63 x 70mm (HxW)
  • Operating Environment
    • Temperature: 0~50°C
    • Humidity: < 90%
  • Storage Environment
    • Temperature: -10~50°C
    • Humidity: < 90%
  • Power Source: 1.5V AA 3pcs or 5V adaptor (both are included)
  • Dimension: 110 x 91 x 30mm
  • Weight: approx. 200g

Set includes:

  • 1 x Professional SD Datalogger
  • 1 x AC 5V Power Adaptor (choose 1 from the available US, UK, AU & EU system)
  • 1 x 256MB SD Memory Card
  • 3 x 1.5V AA Battery
  • English User's Manual
  • Standard Factory Box

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