LM Pro H

G-Tek data loggers (LMPro H) are 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 a choice of PC connectivity through USB port. These data loggers are ideal for all applications where monitoring proper environmental conditions are paramount. These are Programmable and reusable temperature and humidity data loggers. They are available in a variety of models and are configured from the PC to record and monitor data independently. Direct USB connectivity eliminates need for the cable and improves ease of operation. Data loggers come with individual NABL traceable calibration certificate.



  • Up to 50000 Data Records
  • Logging Interval is user programmable from 5 sec to 18 hours
  • Multi character LCD Display with Rec, Min, Max, Battery, OK/Alarm with Event type and Current Reading
  • View Min and Max On display over entire batch on click of a button
  • Display and Storage resolution of 0.01
  • Battery Life of > 1 year*
  • User Replaceable Battery
  • Fully user programmable multiple Alarms settings
  • Insert instantaneous data (TAG) with time stamp
  • Configure and Download multiple data loggers in same file
  • Direct USB connection to PC port


Model LMPro
Integrated Sensor Solid state MEMS Sensor#
Temperature Measurement Range -20 °C to + 60 °C (-4 °F to +140 °F)
Accuracy ± 0.5 °C for the range -20 °C to + 30 °C

± 0.7 °C otherwise

Resolution 0.01  °C – Display and storage

0.01 %RH – Display and storage

Humidity Measurement Range 0 to 100 %RH
Accuracy Humidity ± 3 %RH for the range 20 to 80 %RH

± 5 %RH otherwise

Unit of Measurement Temperature in °C (User has an option to view in °F)

Humidity in %RH

Calibration Each device accompanies NABL (ISO/IEC 17025) traceable certificate
Alarm Visual
Alarm Settings Fully user programmable four alarms for temperature and humidity with alarm type(High/Low), event type(single/cumulative) , alarm delay(Hr:Mn) selection for temperature and humidity.
Logging Interval User programmable from 5 sec to 18 hours via software
Delayed Start Option Start delay from 0 sec to required no. of days by selecting date and time in software
Power Requirement
Battery User Replaceable 3.0 V 225 mAh; CR2032 Panasonic (or Equivalent) Coin Cell Battery;
Battery Life More than 1 year battery operating life with shelf life of 1 year (if data is stored at 15 min interval and display OFF mode). The battery indicator on the display provides information on the remaining lifetime.
Environmental Specification
Temperature during Transportation and Storage – Device inactivated -20 ˚C to + 55 ˚C
Temperature during operation# -20 ˚C to 60 ˚C (EN 12830:1999 Table3, Climatic Type C)
Humidity During Transportation, Storage and usage 0 to 95% RH non-condensing
PC Interface and Software
PC Interface Data of more than 1 year (for 15 min logging interval) can be extracted using LMViewE051 software.
Software Compatibility LMViewE051 is compatible with Windows Operating System currently supported by Microsoft.
Connectivity USB 2.0, USB 3.0 Compatible; Data Download Time: approx. 6 minutes for full data download.
Human Interface
Display Type Character LCD Display with Min, Max, Battery Level Indication, OK/Alarm, Alarm High/Low with event type – single/cumulative, Bell symbol, REC indication and Current reading with measurement unit.
Display Dimension 26 x 31 mm; 0.35” TN Reflective
Memory Size 50000 data storage – for Temperature and Humidity
Memory Type EEPROM, Non-volatile, Data retention more than 40 years
Activation At preset start time by software configuration or

immediate after configuration by long press of “Start” key for more than10 seconds.


De-Activation When preset stop time / maximum no. of readings has reached;

Manually by keyboard/ STOP command from software.

Status Indicator RUN: Recording; Red LED flashes while device is storing.

STP: Standby; Red LED flashes while device is not storing.

Alarm Visual Flashing temperature reading on display along with ▲or ▼  arrow for high or low alarm with bell symbol.
Mounting Device Through hole provided. Refer to operating manual for dimensions details
Material Polycarbonate Plastic: non-breakable, non-corrodible housing
Warranty 12 months from the date of dispatch. Refer to warranty certificate for more details.
Service Provision No user serviceable parts inside, except battery replacement
Physical Characteristics
Overall Dimension

(L x W x H) mm

95.5 x 45 x 14.8 mm
Weight Approx. 51 grams
Electromagnetic Compatibility IEC 61000-6-2/6-3
Resistance to Electrical Storms IEC 61000-6-2; (IEC 61000-4-2 Basic Standard for applicability of tests)


IP Rating IEC 60529: IP 30
Impact Resistance 5 drops from 1 meter onto concrete floor at room temperature with battery in place. Device does not get damaged and there is no loss of calibration.
Vibration EN 12830:1999 Clause and Test Method 5.6.6
RoHS Compliant (EU directive 2011/65/EU)
Verification In accordance with PQS verification protocol E006/TR05.VP.1

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

# The sensor has the highest accuracy between + 5 °C to + 60 °C and 20 to 80 %RH. If the device is exposed to high humidity for a prolonged period, the measuring accuracy decreases. Prolonged exposure may introduce shift in the sensor reading with a slow recovery time. The data logger must not be exposed to a relative humidity of 100% for longer time.


  1. 3.0 V 225 mAh; CR2032 Panasonic Coin Cell Battery

Part No.: 119007

  1. Device calibration certificate


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