Pocket pH Meter ST P111
The St P111 is a non glass pocket pH meter providing the accuracy of a standard bench meter but with absolute flexibility to measure almost any sample. It is particularly useful for the measurement of semi solids such as cheese and many other food products.
The solid state ISFET (Ion Sensitive Field Effect Transistor) can be easily cleaned after measurement with a soft brush. The Reference electrode has a high volume reservoir for long life and is readily replaceable.
The rugged modular design provides reliable pH analysis in applications where glass electrodes are not an option. Calibration is possible using 1, 2 points with as little as 1 drop of buffer solution. Temperature compensation (ATC), Automatic buffer recognition and stability indicators make the Smart St P111 extremely simple to operate.
Features include a clear LCD display of both pH and Temperature in a Waterproof , IP67 rated case. The On Chip Sensor is placed within 5mm of the Reference junction making it possible to measure samples as small as one drop.
Response times are in seconds with built in Automatic Temperature Compensation (ATC) and Automatic Buffer Recognition for easy calibration. Product fits comfortably into the pocket with a pocket clip for security.
Battery life is an impressive 150 hours with Auto Power Off when you forget!.
Comes complete with carry case, pH7 and pH4 buffer solution, protective cap and battery.
Specification :
| Meters | |
|---|---|
| Battery Life | 150 Hours (approx.) |
| Body type | Plastic sealed body. Waterproof to IP67. |
| Dimensions | 142x28x15mm (lwh) |
| Display | Clear Backlit LCD |
| Reference Type | Replaceable Ag/AgCl sat with KCL. Ceramic Junction. |
| Weight | 42g |
| Accessories | |
| pH accuracy | +/- 0.02pH Units |
| pH range | 2-12pH |
| Temperature Accuracy | +/- 1.0 degrees C |
| Temperature range | 0-40 degrees C |
Rugged, Shatterproof pH Testing with the Pocket pH Meter ST P111 (ISFET Sensor)
Experience durable, maintenance-free pH measurement in demanding environments with the Pocket pH Meter ST P111—a compact, non-glass pH tester featuring advanced ISFET (Ion-Sensitive Field-Effect Transistor) technology. Designed for field use, food processing, aquaculture, education, and industrial settings, the ST P111 eliminates the fragility of traditional glass electrodes while delivering fast, reliable readings from 0.0 to 14.0 pH with ±0.1 pH accuracy.
Engineered for Safety, Durability, and Simplicity
Unlike conventional pH meters, the ST P111 uses a solid-state ISFET sensor—no glass, no electrolyte gel, and no risk of breakage. This makes it ideal for on-the-go testing in harsh conditions, student labs, or food production lines where safety and robustness are critical. Its IP67-rated waterproof housing withstands splashes, dust, and even temporary submersion, while the one-button operation ensures instant results with minimal training.
- Non-Glass ISFET Sensor – Unbreakable, low-maintenance, and resistant to shock, vibration, and dry storage.
- IP67 Waterproof & Dustproof – Fully sealed for use in wet, dirty, or outdoor environments.
- Fast Response Time (<10 sec) – Get stable readings quickly in liquids, slurries, or semi-solids.
- Auto-Calibration (1 or 2 Point) – Simple calibration with pH 7.0 and optional pH 4.0 buffers.
- Compact & Pocket-Sized – Includes protective cap and lanyard for field technicians and inspectors.
- Long Battery Life (500+ Hours) – Auto-off function; uses standard button-cell battery (easily replaceable).
Trusted Where Glass Isn’t an Option
From checking hydroponic nutrient solutions and dairy products to monitoring wastewater or teaching basic chemistry, the ST P111 offers a safer, more durable alternative to glass-electrode meters. Its solid-state design requires no refilling, resists clogging, and can be stored dry—making it perfect for intermittent use or mobile applications.
Whether you’re in a greenhouse, a brewery, or a school lab, the Pocket pH Meter ST P111 delivers dependable pH testing—without the fragility.
Tough. Simple. Always ready.
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