PS7400 Pisonics Tuning Fork vs Endress+Hauser Liquiphant FTL51
PS7400 and E+H Liquiphant FTL51 are both tuning-fork vibration density meters. This table compares measurement parameters, installation, price, and service.
Feature comparison
| Feature | Online tuning fork density meter | Endress+Hauser Liquiphant FTL51 |
|---|---|---|
| Measurement principle | Tuning fork vibration frequency | Vibration fork |
| Density accuracy | ±0.001 g/cm³ | ±0.001 g/cm³ |
| Repeatability | ±0.0002 g/cm³ | ±0.0001 g/cm³ |
| Process temperature | -50~+200°C (high-temp) | -50~+280°C (high-temp) |
| Process pressure | ≤ 4 MPa (high-pressure) | ≤ 100 bar |
| Viscosity tolerance | ≤ 1,000 cP | ≤ 10,000 mPa·s |
| Insertion length | 100 / 150 / 200 / 300 / 400 mm | 150~6000 mm (custom) |
| Wetted materials | 316L / Hastelloy / Ti / Duplex / PTFE | 316L / Alloy C / Tantalum / coatings |
| Process connection | Flange / sanitary clamp / threaded / cable | Flange / clamp / threaded |
| Output signals | 4-20mA + Modbus + HART | 4-20mA + HART + PROFIBUS PA + Foundation Fieldbus |
| Hazardous area | Ex d ⅡC T6 Gb / CE | ATEX / IECEx / FM / CSA |
| Lead time | 4~6 weeks | 8~14 weeks |
| Local service | China factory direct | Overseas HQ + China agents |
Competitor parameters cited from Endress+Hauser Liquiphant FTL51 datasheet.
Takeaway
The E+H Liquiphant family is a mature global benchmark in tuning-fork density meters. PS7400 offers equivalent technical specs (density accuracy ±0.001 g/cm³) with targeted advantages: (1) 4-6 week delivery — half the typical E+H lead time; (2) PTFE coating, 316L / Ti / Hastelloy wetted parts all customizable; (3) F1~F6 mounting accessories cover inline / tank / scale-prone applications; (4) sanitary clamp versions for food and pharma GMP. Each suits different scenarios: European projects, multinational standardized needs favor E+H; domestic Chinese projects, fast-delivery, deep-customization needs favor PS7400.