Data Loggers | LM PRO – RH

G-Tek data loggers (LM PRO -RH) is an upgraded model with larger display, easy to mount and with improved accuracy. It is Easy to Use, Accurate and Affordable solutions to monitor and record temperature and humidity – environmental parameters that are critical to a wide variety of industries. It also offers PC connectivity through USB port. These data loggers are ideal for all applications where monitoring proper environmental conditions are paramount. These are reusable temperature and humidity data loggers. They are configured from the PC to record and monitor data independently. Direct USB connectivity eliminates need for the cable and improves ease of operation.



  • Up to 32000 Data Records.
  • Logging Interval is user programmable from 2 sec to 18 hours.
  • LCD Display with Min, Max, Battery Low, Rec, Alarm High, Alarm Low And Current Reading.
  • 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 >2 year
  • User Replaceable Battery
  • Insert instantaneous data (TAG) with time stamp.
  • Download multiple data loggers in same file and view them together.
  • Direct USB connection to PC port.



Model LM PRO- RH

Display and Operator Panels

Display Type 3½ Character LCD Display with Min, Max, Battery Level Indication, Alarm high and Low, REC and  Current reading with measurement unit
Display Dimension 22 x 30 mm; 0.35” TN Reflective
Display Resolution 0.1
Display ON/OFF/Auto off Programmable from PC Application
Status Indicator Red LED for Device working

Red LED for Batch Start / Stop

Panel Keys One
Reading Types Actual with Min Max. ON Display and PC
Min / Max Min Data Display / Max Data Display / Current Data with respect to Current Measurement


Data Storage Yes
Memory 16000 Data Records of each Temperature and %RH
Memory Type Flash, Non-volatile, Data Retention up to 100 years

Analog Input Details

No. Of Channels 2; Temperature and %RH
Temperature Solid state MEMS sensor Internal to the device
Temperature Range -20 to + 60 °C (-4 to +140 °F)
Temperature Measurement Accuracy ± 0.5 °C
Sensor Response Time t63 30 min for step change of 50
%RH Sensor Type Solid state MEMS sensor Internal to the device
Humidity Range 0-100 %RH;
%RH Measurement Accuracy ±3% RH between 20-80 %RH; ±4% RH otherwise
Temperature Effect ± 0.5% RH max for temperature range of 10 to 50 Deg C
Sensor Resolution 0.01 storage / 0.1 display
Batch Details
Start/Stop Immediate
Batch Stop Intermediate Any time / Memory Full / After n Reading / At Specific Time
Logging Interval Programmable from 1 Sec to 18 Hours via Software
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




Download Batch Intermediate after any time the batch started/After the Batch is completed
Temperature (Operation)-20˚C to 60˚C
(Limiting) -25˚C to 70˚C
(Storage) -35˚C to 70˚C
Humidity (Operation) 0 to 100% RH

Power Requirement

Supply Voltage (Battery Operated) 3.0 V 950mAH; CR2477 Panasonic Coin Cell Battery; User Replaceable
Battery Life >2 Year, at 25˚C and 15min Store Interval
Battery Reverse Polarity Protected


User Calibration Feature Factory Calibrated + 2 Point user calibration for each sensor
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 on PC

Confirmatory Standards

Product EN 12830
EMI-EMC EN 61000-6-3 / EN 61000-6-2
Pollution Degree II
Installation Category IV
Vibration 2g Peak (10Hz-150Hz)
Shock IEC 61010-1
IP Rating IP20


Connectivity USB 2.0, USB 3.0 Compatible
Data Download Time approx 3 sec for 32000 data records

Overall Dimension

Dimension (mm) 120(L) x 40(W) x 31(H)
Mounting From the key hole provided on the top

Specifications are subject to change without notice


  • 0 V 960mAH; CR2477N Lithium Coin Cell Battery

Part No.: 200790


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