DRAGINO · Sensor · LoRa · LoRaWAN pH Sensor · SPH01-LB-EU868

The Dragino SPH01-LB is a LoRaWAN soil pH sensor for IoT in agriculture. It is designed to measure soil pH and soil temperature and send it to the platform to analyse the acidity or alkalinity of the soil. The probe is IP68 waterproof.

The SPH01-LB probe consists of a solid AgCl reference electrode and a pH-sensitive electrode made of pure metal. It can determine the pH value of the soil with high accuracy and stable value. The SPH01-LB probe can be buried in the soil for a long time.

The LoRa radio technology used in the SPH01-LB enables the device to transmit data and achieve extremely long ranges at low data rates. It offers spread spectrum communication with extremely long range and high noise immunity with minimal power consumption.

The SPH01-LB supports BLE configuration and wireless OTA updates, making it easier for the user to use.

The SPH01-LB is powered by an 8500mAh Li-SOCI2 battery or a solar-powered + Li-on battery and is designed for long-term use of up to 5 years.

Each SPH01-LB is pre-loaded with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will automatically connect after power on.

Features: 

• LoRaWAN 1.0.3 Class A
• Bänder: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
• Ultra-low power consumption
• Monitoring of the soil pH value with temperature compensation
• .
• Monitoring of the soil temperature
• Monitoring of the battery level
• Support for pH calibration by the end user
• Supports Bluetooth v5.1 and LoRaWAN remote configuration
• Supports wireless OTA update of the firmware
• Waterproof IP66 housing
• IP68 protection for the sensor controller
• AT commands for changing parameters
• Downlink for changing the configuration
• 8500mAh Li/SOCl2 battery (SPH01-LB) 

Applications: 

Intelligent agriculture 

Technical data:

• Supply voltage: Built-in battery, 2.5v ~ 3.6v
• Operating temperature: -40 ~ 85°C

pH value of the soil:

• Range: 3 ~ 10 pH 
• Resolution: 0.01 pH
• Accuracy: ±2% below (0~50 ?, accuracy will be poor below 0 due to frozen)
• Temperature compensation range: 0~50?
• IP68 protection
• Length: 3.5 metres

Bottom temperature:

• Range -40?~85?
• Resolution: 0.1?
• Measurement accuracy: <±0.5?(-10?~40?),<±0.8? (others)

IP68 protection
Length: 3.5 metres
 

LoRa Spec:

• Frequency range, band 1 (HF): 862 ~ 1020 Mhz
• Max. +22 dBm constant RF output vs.
• RX sensitivity: up to -139 dBm.
• Excellent blocking immunity

Battery:

• Non-rechargeable Li/SOCI2 battery
• Capacity: 8500mAh
• Self-discharge: <1% / year @ 25°C
• Max. Continuous current: 130mA
• Max. Charging current: 2A, 1 second

Current consumption:

• Sleep mode: 5uA @ 3.3v
• LoRa transmit mode: 125mA @ 20dBm, 82mA @ 14dBm