Data Logger | LM-T PRO RF

The LM-T-PRO RF series of wireless data logger is a new RF based data logger that measures temperature and transmits data using Radio Frequency to eliminate clumsy and time-consuming wiring requirements. These data loggers are very useful in monitoring data across large facilities as they do not require any wiring. Deployment is very quick and easy. Data are sent by each device directly to the centralized broker (repeater) device and from there to gtekNetTM software over ethernet port. These data can be accessed from any network connected device using standard web browser.

The data logger consists of RF radio transmitter and receiver operating at 869.88 MHz (SRD License Free: EU Version) frequency. These data loggers form a star network with its broker. The broker is connected to the client-server based gtekNetTM software through ethernet. A new data logger when it is in the range of the central node – broker, gets connected to the gtekNetTM. Each device transmits its data to the broker and is captured in gtekNetTM. Any parameter of the data logger when set / changed from gtekNetTM, first goes to the broker and then to the device. These data loggers have an internal memory of 3000 data sets. In the event of communication failure between broker and device or broker and gtekNetTM, after reconnection, all the missed data will be synchronized by gtekNetTM automatically. This ensures that no data is missed.

  • RF based data logger
  • Up to 100m range (Line of Sight – Actual range may vary based on site condition)
  • No wiring required
  • Quick to deploy
  • LCD Display
  • Long battery life > 1year at 15min Store interval
  • Resolution of 0.1
  • Upto 3000 data storage
Model NoLm PRO RF Temperature Datalogger
Product Code6111-x6
Display and Operator Panels
Display TypeLCD Display, 31/2 digits;
Status IndicatorUnit Indication, Individual High and Low Alarm Indication, Battery Status and Storage on Indication
Analog Input Details
Sensor Types: (PCB mounted, Internal Sensors)
TemperatureThermistor 10K / Solid-state
Range-30 °C to + 60 °C
Accuracy± 0.5 °C
Measurement Rate5 min Default
Batch Storage / Data Memory Details
Start / StopRemote Start – Stop through gtekNetTM Software
Store Interval5 minutes to 18 Hrs
Memory Size3000 records;
Memory TypeRollover
Temperature(Storage) -40˚C to 70˚C
Humidity(Storage) 5 to 90 % RH Non Condensing
Power Requirement
Supply VoltageInternal 2x1.5V 2500mAH battery size AA
Battery Life>12 months @ 25 Deg C, communication @ every 5 mins approx
Communication Rate5 minutes default
RF Transmission869.88 MHz (SRD License Free: EU Version)
PowerTx: 10dBm

Rx: -40dBm

Range100m Line of Sight approx.

(may vary based on the field conditions and interferences)

Network TopologyStar
RF Data Packet StandardIEEE 802.15.4, open communication architecture
AntennaIntegrated on PCB Omnidirectional
Alarm Output
Alarm Set-pointHigh/Low individually settable for each channel
Alarm IndicationWith Display Flashing and arrow to indicate High or Low
Alarm DelayUser Settable - 0 to 255 mins
Overall Dimension
Dimension L x W x D (mm)135 x 75 x 30 Approx
Protection ClassIP54

No Accessories are supported.