LM-U Pro

G-Tek’s Universal series single channel data loggers are reusable, portable, easy to access the data among the most popular and most flexible products. The LM- U Pro Data logger is an external sensor universal input- RTD/Thermocouple/process input. It also offers a choice of PC connectivity through USB port. This versatile device can be configured via software to monitor the process parameter and displaying of data for analysis and generating the report.  The external sensor RTD (Pt-100) is available for extended temperature range of -200 to +850 °C. Data loggers come with individual NABL traceable calibration certificate.



  • Up to 32000 Data Records
  • Multi character LCD Display with Rec, Min, Max, Battery and Current Reading
  • Universal sensor input
  • View Min and Max On display over entire batch on click of a button
  • Display resolution of 0.1
  • Storage resolution of 0.01
  • Battery Life of > 1 year*
  • User Replaceable Battery
  • Fully user programmable configuration
  • Insert instantaneous data Tag with time stamp
  • Configure and Download multiple data loggers in same file


Model No LM-U Pro Data logger
Display and Operator Panels
Display Type 3.5 Character LCD Display with Min, Max, Battery Status, Alarm Hi-Low and Current Temperature
Display Dimension 33 x 30 mm; TN Reflective
Display Resolution 0.1 / 1.0
Display ON/Auto off Programmable from PC Application
Status Indicator HB LED for Device working

STR LED for Batch Start / Stop

Panel Keys Front panel KB consisting of 2 keys
Min / Max Min Data Display / Max Data Display / Current Data with respect to Current Measurement
Display Blinking on Alarm high – low Condition
Reading Types Actual with Min Max. ON Display and PC
Analog Input Details
No of Inputs 1
Sensor Input Type Types J, K, R, S, T
RTD PT-100; DIN43760, σ=0.00385
Vdc 0-1V
mA 4-20mA; 0-20mA (Internal Shunt Resistance of 50 Ω 0.1%)
Accuracy  ± 0.25% FSD ±1 digit
Linearization Polynomial Based Software Linearization
Resolution 0.1/1.0
CJC Error  ±0.5˚C for 0-50˚C
Sensor Type and Range Refer to the Table 2
Batch Storage / Data Memory Details
Start / Stop Immediate
Batch Stop Intermediate Any time / Memory Full / After n Reading / At Specific Time
Store Interval 5 Second to 18 Hour
Delayed Start Absolute / Relative up to 45 days
Tagging Yes. On long press of a Key with an indication on display
Batch Stop required to Download No
Data Storage Yes
Memory 32000 Data Records
Memory Type Flash, Non-volatile, Data Retention up to 100 years
Download Batch Intermediate after any time the batch started/After the Batch is stopped.
Temperature (Operation) 5˚C to 45˚C
(Limiting) 0˚C to 50˚C
(Storage) -20˚C to 60˚C
Humidity (Operation) 10 to 80 % RH Non-Condensing
(Storage) 5 to 90 % RH Non-Condensing
Power Requirement
Supply Voltage (Battery Operated) 3 V, 2700 mAh, 2 X AA (1.5V) battery; User Replaceable
Battery Life Upto 1 Year, at 25˚C and 15min Store Interval
Battery Reverse Polarity Protected
Restore Calibration User can revert to original factory calibration any time
Reusability Yes
Online Feature Power saver mode when USB connected, Online Batch with Current Data Display using LmView software
Connectivity Micro USB data cable (USB 2.0, USB 3.0 Compatible)
Data Download Time Approx. 2 min for 32000 data records
EMI-EMC EN 61326 Class A
Pollution Degree II
Installation Category I
Vibration 2g Peak (10Hz-150Hz)
Shock IEC 61010-1
IP Rating IP30
Overall Dimensions
Dimension L x W x D (mm) 135 (L) x 76 (W) x 27 (D)
Mounting Wall Mounting Bracket

*: Available as per order code selected. Specifications are subject to change without notice.

Table 2 Sensor Types with their respective ranges

Sensor Range
RTD (Pt-100) -100 to 600 °C
4-20mA ± 1999
0-20mA ± 1999
0-1V ± 1999
J type TC 0 to +400 °C
K type TC 0 to +1200 °C
R type TC 0 to +1700 °C
S type TC 0 to +1700 °C
T type TC -100 to +400 °C


  1. USB cable
  2. Device calibration certificate


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