DFrobot Gravity Analog pH Sensor Meter Pro Kit V2

This analog pH meter V2 PRO is specifically designed to measure the pH value of solutions and water, reflecting the degree of acidity or alkalinity. It is widely used in various applications such as aquariums, aquaponics, aquaculture, pools, swimming pools, and environmental water investigations. As an improved version of the pH meter V1, this product significantly enhances precision and user-friendliness. The built-in voltage regulator chip supports an operating voltage from 3.3 to 5.5V, compatible with both 5V and 3.3V microcontrollers. The output signal, filtered by hardware, has a low jitter. The software library uses a two-point calibration method and can automatically identify two standard buffer solutions (4.0 and 7.0).  With this product and an Arduino with the matching software library, you can quickly build a pH meter and, for example, measure the pH value of your aquarium. It uses an industrial electrode and has a built-in simple connection and a long lifespan, very suitable for online monitoring.

Important Operating Information:

1. The BNC connector and the signal conversion board must be kept dry and clean, otherwise the input impedance will be affected, resulting in inaccurate measurements. If it is moist, it needs to be dried.
2. The signal conversion board should not be placed directly on a wet or conductive surface, otherwise the input impedance will be affected, leading to inaccurate measurements. It is recommended to fix the signal conversion board with nylon spacers, maintaining a certain distance between the signal conversion board and the surface.
3. The sensitive glass bulb at the head of the pH probe should not come into contact with hard material. Any damage or scratches will cause the electrode to fail.
4. After completing the measurement, disconnect the pH probe from the signal conversion board. The pH probe should not remain connected to the signal conversion board for an extended period without power.

Recommended Accessories:

• Gravity 16Bit 4-Channel ADC Analog Digital Converter I2C ADS1115

Features:

• Operating voltage 3.3V to 5.5V
• Hardware filtered output signal, low jitter
• Gravity and BNC connector, plug and play, no soldering required
• The software library supports two-point calibration
• Improved transducer - more accurate and stable
• Industrial probe - supports 7x24h measurements

Technical Details:  

• Signal converter board:
• Supply voltage: 3.3 to 5.5V DC
• Output voltage: 0 to 3.0V
• Probe connection: BNC
• Signal connection: PH2.0-3P
• Measurement accuracy: ±0.1@25℃
• Dimension: 42 x 32mm
• pH probe:
• Probe type: Industrial quality
• Detection range: 0 to 14
• Temperature range: 5 to 60°C
• Accuracy: ±0.1pH at 25°C
• Response time: <1min
• Internal resistance: <250MΩ
• Sonde life: 7x24 hours >0.5 years (depending on water quality)
• Cable length: 500cm

Contents:

• 1x pH probe (industrial quality)
  
• 1x pH signal converter board
• 1x Analog Gravity sensor cable
• 2x Waterproof seal
• 1x Screw cap for BNC connector
• 4x M3 x 10mm nylon spacers
• 8x M3 x 5mm screws