Vaisala K‑PATENTS® SAFE-DRIVE Process Refractometer PR-23-SD

for kraft chemical recovery applications
Vaisala K-PATENTS SAFE-DRIVE Process Refractometer PR-23-SD is a heavy-duty, digital refractometer for measuring black liquor dry solids % b.w. and green liquor density or TTA in kraft chemical recovery process.

Vaisala K-PATENTS SAFE-DRIVE Process Refractometer PR-23-SD complete system consists of:

– Retractable SAFE-DRIVE Process Refractometer Sensor
– SAFE-DRIVE Isolation Valve
– SAFE-DRIVE Retractor
– Steam Wash System
– Indicating Transmitter

SAFE-DRIVE design allows for safe and easy insertion and retraction of the sensor under full operating pressure without having to shut down the process.
The measurement range covers 0-100 % by weight. The accuracy is typically ±0.1 % b.w. and the measurement is automatically temperature compensated. Low and high concentration alarms can be configured. Because of the digital sensing technology, even large amounts of suspended solids, bubbles or color changes do not affect the measurement or the accuracy.

Each sensor is provided with a calibration certificate comparing a set of standardLiquids to the actual sensor output. The calibration and accuracy can be verified on-site with the certified Refractive IndexLiquids.