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.
Features
- 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 (configurable)
- Insert instantaneous data Tag with time stamp
- Configure and Download multiple data loggers in same file
Specification
| 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 (configurable) 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. |
| Environmental | |
| Temperature | (Operation) 5ËšC to 45ËšC |
| (Limiting) 0ËšC to 50ËšC | |
| (Storage) -20ËšC to 60ËšC | |
| 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 25ËšC and 15min Store Interval |
| Battery Reverse Polarity | Protected |
| General | |
| 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 |
| Communication | |
| Connectivity | Micro USB data cable (USB 2.0, USB 3.0 Compatible) |
| Data Download Time | Approx. 2 min for 32000 data records |
| Standards | |
| 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 |
Accessories
- USB cable
- Device calibration certificate
FAQs
LM-U Pro
Yes. LM-U Pro supports RTD (Pt-100), Thermocouples (J, K, R, S, T), 4-20mA, and 0-1V inputs — so you don’t need different loggers for different applications.
No. It uses non-volatile flash memory that safely stores up to 32,000 records with long retention — your data remains secure.
Not at all. You can easily configure it through PC software and download complete reports via USB in just a few minutes.
Yes. You can directly view current, minimum, and maximum readings on the LCD with a single button press.
Because it combines universal input flexibility, high memory capacity, long battery life, and NABL traceable calibration — giving you reliable, audit-ready data in one compact device.
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