PH5013A PTFE pH Sensor for Corrosive Medium Liquid Testing
Introduction
This PH5013A PTFE pH sensor is a reliable choice for measuring pH in tough, corrosive liquids where ordinary pH glass probes often fail fast. Its PTFE housing and protective ring guard the low-impedance glass tip from damage and chemicals, helping keep readings accurate and consistent.
The solid dielectric and wide PTFE junction make it low-maintenance by avoiding clogs in oily or particle-filled solutions, and a long reference path helps it last longer in harsh spots like sewage. It includes temperature fixes with options like NTC 10K or Pt100, and installs easily with 3/4 NPT threads for direct fitting into tanks or pipes—no extra covers needed, which saves time and money.
It works with most controllers via low-noise cables that handle signals over 40 meters without interference. For best results, clean it with distilled water, store it in a KCl solution, and use dilute acid if buildup occurs; it usually lasts about a year in normal use but less in extreme conditions, and calibrate it with a three-point calibration solution after warming up for steady performance.
Working principle
Step 1: Sensing the pH
The sensor’s glass tip detects hydrogen ions in the liquid, acting like a mini battery to generate a small voltage based on the ion concentration, while a stable internal reference provides a consistent comparison point.
Step 2: Signal processing
This voltage signal travels through the sensor’s low-noise cable to a connected controller, where it’s amplified and converted using basic chemical equations (like Nernst) to calculate the pH value.
Step 3: Temperature adjustment
Built-in sensors measure the liquid’s temperature and automatically correct the reading to account for the heat’s effect on ion activity, ensuring accurate results even as conditions vary.
Key features
This PTFE pH probe offers practical perks for everyday use in rough spots:
- Maintenance-Free Design: Uses solid dielectric and large-area PTFE junction for steady performance with little cleaning needed.
- Clog-Free Operation: Stops blockages without extra fillers, ideal for messy liquids.
- Extended Electrode Life: Long reference path boosts durability in sewage or corrosive spots.
- Simplified Installation: Durable PPS/PC shell with 3/4 NPT threads allows side or upright mounting on vessels or pipes, no extra cover required to save time and money.
- High Accuracy: Gives precise, quick, and repeatable results with a stable Ag/AgCl reference.
- Long-Distance Transmission: High-quality, low-noise cable fights interference for signals over 40 meters, adding setup options.
Specification
| Product | PTFE pH sensor |
| Model | PH5013A |
| Measurement range | 0 ~ 14 pH |
| Zero potential point | 7 ± 0.5 pH |
| Slope | > 95% |
| Internal impedance | 150-250 MΩ(25℃) |
| Practical response time | < 1 min |
| Installation size | Upper and Lower 3/4NPT Pipe Thread |
| Temp compensation | NTC 10 KΩ/Pt1000 |
| Heat resistance | 0 ~ 60℃ for general cables |
| Pressure resistance | 3 bar at 25 ℃ |
| Connection | Low-noise cable |
Applications
The PH5013A PTFE pH sensor and probe are ideal for monitoring pH in challenging environments with corrosive, oily, or particle-laden liquids:
- Industrial wastewater systems: Reliably measure in flows containing oils, solids, or contaminants that could clog standard sensors.
- Electroplating plants: Accurately tracks pH in acidic or alkaline chemical baths to ensure process quality and prevent equipment damage.
- Paper mills and beverage production: Monitors pH during manufacturing lines to maintain product consistency and avoid corrosion in pipes.
- Two-chamber electrode setups: Protect against electrode poisons in complex systems.
- Fluoride-containing media: Handles solutions with hydrofluoric acid concentrations up to 1000 mg/L without degrading.
