The Dragino LTC2 Industrial LoRaWAN Temperature Transmitter is designed to monitor temperature for different environment. It supports to read PT100 probe and convert the value to temperature and

uplink to IoT server via LoRaWAN protocol.

LTC2 supports datalog feature. User can retrieve the sensor value via LoRaWAN downlink command.

LTC2 is powered by 8500mA Li-SOCI2 battery for long time measurement. The battery can run 2~10 years depends on the network environment and working mode.

Each LTC2 has two internal 16-bit ADC interfaces and are calibrated on 12 set resistors to make sure the accuracy measurement on wide range.

LTC2 is LoRaWAN v1.0.3 compatible. Each LTC2 is pre-load with a set of unique keys for LoRaWAN registration, register these keys to local LoRaWAN server and it will auto connect after power on.

Features:

LoRaWAN v1.0.3 Class A

max: 2 x monitor temperature channels

Support 3 -wire PT-100

8500mAh Li-SOCI2 Battery

Firmware upgrade via console

Wall Mountable

Configurable via LoRa or UART

Datalog and retrieve via LoRaWAN

Use pre-load PT100 probe or 3rd PT100 probe

Factory calibration for different resistance range

Support accuracy measure of resistance and upload

Battery Monitoring and upload

Specifications

Micro Controller:

➢ MCU: STM32L072CZT6

➢ Flash:192KB

➢ RAM:20KB

➢ EEPROM: 6KB

➢ Clock Speed: 32Mhz

Common DC Characteristics:

➢ Supply Voltage: built in 8500mAh Li-SOCI2 battery

➢ Operating Temperature: -40 ~ 85°C

Temperature Sensor:

LTC2-SI: Standard IP68 Type

Standard IP68 Probe Version

LTC2 with 1 x Standard IP68 PT100 probe.

Installation: Insert

Cable Length: 2m

PT100 Class: Class A

Probe Dimension: 4*30mm

Measure Range: -50 ~ 200 °C

Suitable Environment: General environment

LTC2-FS: Food Safety Type

LTC2 with 1 x Food Safety PT100 probe.

Installation: Insert

Cable Length: 2m

PT100 Class: Class A

Probe Dimension: 4*150mm

Measure Range: -50 ~ 200 °C

Suitable Environment: Food temperature measurement

LTC2-FT: Flat Type

LTC2 with 1 x Flat Type PT100 probe.

Installation: Attached

Cable Length: 2m

PT100 Class: Class A

Probe Dimension: 8*25mm

Measure Range: -50 ~ 200 °C

Suitable Environment: Attached to the measure point.

LTC2-LT:  Low Temperature

LTC2 with 1 x Low Temperature PT100 probe.

Installation: Insert

Cable Length: 2m

PT100 Class: Class A

Probe Dimension: 4*30mm

Measure Range: -196 ~ 150 °C

Suitable Environment: Low temperature measurement, such as COVID vaccine transport

LTC2-HT: High Temperature Version

LTC2 with 1 x high temperature PT100 probe.

Installation: Insert

Cable Length: 3m

PT100 Class: Class A

Probe Dimension: 4*30mm

Measure Range: -70 ~ 550 °C

Suitable Environment: High Temperature

LTC2-NA: No Probe

User can connect to their own PT100 probe

Grand Hole: M12

LoRa Spec:

➢ Frequency Range,

✓ Band 1 (HF): 862 ~ 1020 MHz

➢ 168 dB maximum link budget.

➢ High sensitivity: down to -148 dBm.

➢ Bullet-proof front end: IIP3 = -12.5 dBm.

➢ Excellent blocking immunity.

➢ Built-in bit synchronizer for clock recovery.

➢ Preamble detection.

➢ 127 dB Dynamic Range RSSI.

➢ Automatic RF Sense and CAD with ultra-fast AFC.

➢ LoRaWAN 1.0.3 Specification

Power Consumption

➢ Sleeping Mode: 20uA

➢ LoRaWAN Transmit Mode: 125mA @ 20dBm 44mA @ 14dBm

 Applications

✓ Wireless Alarm and Security Systems

✓ Home and Building Automation

✓ Industrial Monitoring and Control

✓ Long range Irrigation Systems.

Order Info:

LTC2-XX-YY:

XX: probe option, spec see datasheet

SI: Standard IP68

FS: Food Safety

FT: Flat Type

LT: Low Temperature

HT: High Temperature

NA: No Probe

YY: the default frequency band

EU433: Default frequency band EU433

CN470: Default frequency band CN470

EU868: Default frequency band EU868

IN865: Default frequency band IN865

KR920: Default frequency band KR920

AS923: Default frequency band AS923

AU915: Default frequency band AU915

US915: Default frequency band US915

Useful Link:

Datasheet

User Manual

Decoder

Firmware

Certificate

ER26500_Datasheet-EN.pdf

ER26500_SPC1520_Drawing.pdf