Proud Distributors of GUNT Hamburg, UTEST, FOUR E’s Scientific & LABTECH ITALY

USB Temperature Data logger (LES- SSN-11)

USB Temperature Data logger (LES- SSN-11)

SKU LES-SSN-11 Categories ,

Two-Channel Humidity, Temperature and Dew Point Data Logger with USB Interface and LCD Display.

Code LES-SSN-11
  • It Can Also Be Used as an Easy and Portable Meter
  • Low Cost
  • Easy to use
  • 4 Years battery life
  • Single series Number
  • Password restriction


  • This data logger measures and stores up to 32,000 humidity (0 to 100%RH) and temperature (-35 to 80℃ (-31~176℉) readings.
  • Dew point and more professional applications can be provided by the PC software D Graph TM.
  • Logger status, alarm indication and low battery indication are via flashing red/green LED and yellow LED.
  • The button on housing can be used to start logging, or confirm and clear LED alarm when LED alarm is hold status.
  • User can plug data logger straight into PC’s USB port without any cables.
  • Before getting started, user need to install USB driver and DGraph™ software, provided on the CD which is included in product packing box.
  • All the software can run under Windows XP, Vista, 7 or 8(32 bit and 64-bit Versions).
  • User can easily use D Graph TM software to setup sample rate (from 10 seconds to 12 hours), high/low alarm limit and start/stop method, and download data to PC, etc.
  • And then user can view, analyse and print the data, or export other file formats (txt, xsl, csv, bmp, jpg).
  • Especially, for some professional applications, user can set access password, name each channel, enable/disable specified channel, input calibration data for each channel, disable LED indication for saving power, and select sample mode (Instant, Average, Maximum and Minimum), etc.


This data logger is used mainly to monitor and verify humidity & Temperature-sensitive goods, equipment or areas, e.g.:

  • Shipping
  • Food
  • Pharmaceutical
  • Warehouse
  • Museums
  • Buildings
  • Computer rooms
  • Communications Equipment
  • Containers
  • Aircraft cabins
  • Equipment run time
  • Laboratories
  • Libraries
  • HVAC
  • Refrigeration
  • Agriculture & livestock
  • Green houses
  • Environmental & weather monitoring


  • Portable, precise, compact and low cost
  • Easy to log and analyse data
  • Unique and uniform PC Software DGraph™ can meet your higher requirements
  • Elaborate design make it perfectly work in more application field
  • Strict design ensures long term reliable work
  • Enhanced electrostatic protection design to prevent unexpected damage.


  • Measurement:


Measurement range -35~80℃ (-31~176℉)
Accuracy (Typ.) Figure 1 ±0.5℃ (±0.9℉)
Resolution 0.1℃/0.2℉
Long term Drift Negligible
  • General:
Memory capacity 64Kbytes (Total 32.000 readings for all channels)
Sample rate Can be selected from 10 seconds to 12 hours
Start Method Immediately, start by button, and start at date & time
Stop Method Stop when memory full, overwrite when memory full, stop until specified number of sample points finished.
Sample mode Instant(default), average, maximum and minimum
Button Software Config to start logging by button, or clear or reset LED alarm when LED alarm is on hold.
LED Red & Green LED: Logger status indication (Delay to start, logging alarm, finished)

(Software can disable the two LED’s for power saving)

Yellow LED: Low battery indication

Alarm User programmable high or low alarm limit for each channel (if necessary)

LED Alarm and hold

Communication Direct USB connection

Need to install the driver provided on CD

PC Software DGraph™ Software and USB driver required (provided on CD)
Power supply User replaceable ½ AA, 3.6v lithium battery 1200mAh

NOTE: USB interface can supply power directly if necessary

Battery life Approx. 2 years: 1 Minute sample rate

Approx. 4 Years: 10 Minute sample rate

Approx. 8 years without any sample task

NOTE: It also depends on ambient temperatures and using of LED’s

Operating range 0 to 100% RH -35 TO 80℃
Storage Range Recommended: 20 to 60%RH     10 TO 50%
Case material ABS, TPU, PC
Dimensions 123mm x 37mm x 23mm (4.8″x1.5″x0.9″)
Weight Approx. 90 grams
Mounting Mounting bracket (Optional) or locking eyelet
Standard Compliance IP66

How to start:

  • This new data logger is designed to use very easily. You only need to operate step by step according to the “Quick Start Guide” included in product packing box (or pdf file on the CD).
  • Below is all related document:
  • Product Datasheet Current document, included on the CD
  • Quick Start Guide Printed and included on the CD
  • DGraphSoftware Datasheet Included on the CD
  • DGraph Software Guide Included on the CD or on the help menu of DGraph™ Software user interface
  • Product Selection Guide Included on the CD

Battery Replacement:

  • When battery is exhausted or replaced, stored readings aren’t lost.
  • However, the latest logger task which have not been finished will be stopped and can’t be restarted even if new battery installed.
  • You can setup datalogger via DGraph™ software to restart new task.
  • Especially, you can download data without battery because USB interface can supply power directly.
  • We recommend that you check the battery capacity before some important logging task.

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.