PS7110 Pisonics Refractometer vs Anton Paar L-Rix In-Line Refractometer
The Pisonics PS7110 and the Anton Paar L-Rix are both industrial inline refractometers working off the critical angle. This table compares span, accuracy, process temperature and pressure, prism material, cleaning, hazardous-area and sanitary provisions, interfaces and lead time.
Feature comparison
| Feature | Refractive concentration meter | Anton Paar L-Rix 5x00 series |
|---|---|---|
| Measurement principle | Critical-angle refractometry; CCD array reads the shadow-line position | Optical refractive index (sapphire prism) |
| Refractive index range | A: 1.33299–1.51782; B / C: 1.33299–1.57041 | 1.32~1.53 nD |
| RI accuracy | ±0.0001 | ±0.0001 nD |
| Concentration accuracy | ±0.1 % (resolution 0.01 %) | ±0.05 Brix |
| Process temperature | A: 0–60 °C; B: 0–70 °C; C: −10–100 °C | -20~+150°C |
| Process pressure | ≤ 1.5 MPa at the prism face | ≤ 40 bar |
| Prism material | A: high-strength optical glass; B / C: sapphire | Optical-grade sapphire |
| Auto-cleaning | PS7110-CL1 ultrasonic cleaning unit / PS7110-CL2 high-pressure flushing unit (optional); CIP and SIP capable | Pneumatic prism wiper (optional) |
| Hazardous area | Ex ia IIC T6 Ga (intrinsically safe) | ATEX / IECEx |
| Sanitary | Compact tri-clamp; PS7110-MT4 sanitary adapter; CIP and SIP capable | 3-A / EHEDG standard |
| Wetted materials | SS316L plus prism; B / C accept PTFE / Hastelloy / titanium / tantalum | — |
| Output signals | 4–20 mA / RS485 / RS232 / USB | 4-20mA + HART |
| Lead time | 4~6 weeks | 8~12 weeks |
| Local service | China factory direct | Overseas HQ + China offices |
Competitor parameters cited from Anton Paar L-Rix 5x00 series datasheet.
Takeaway
Anton Paar is the reference brand for industrial inline refractometers, and the L-Rix is widely deployed across sugar, beverage and chemical plants. The measuring principle is the same on both sides — critical-angle refractometry reading the position of a shadow line.
Where the L-Rix is ahead, stated plainly: the top of its process-temperature range (150 °C against 100 °C for the PS7110-C), pressure rating (40 bar against 1.5 MPa), and 3-A / EHEDG sanitary certification as standard — the PS7110 offers a tri-clamp connection and CIP/SIP capability but does not carry those certificates. Above 100 °C, above 1.5 MPa, or where a 3-A / EHEDG certificate is a stated requirement, the PS7110 is not the instrument for the duty.
What the PS7110 brings instead: concentration accuracy of ±0.1 % at 0.01 % resolution; index and temperature calibrated unit by unit at the factory, so several instruments agree with one another; sensor status diagnostics that report a fouled prism before the reading is visibly wrong; RI verification, self-service modelling from sampled laboratory values and multi-point temperature compensation all available on site, so a change of medium does not mean a return to the factory; and a choice of ultrasonic (CL1) or high-pressure flushing (CL2) cleaning units. With four to six week delivery and local engineering support, it suits duties inside its temperature and pressure envelope where lead time and field serviceability matter.
Figures in the right-hand column are quoted from Anton Paar's published literature; we have not verified them independently and give them for reference only.