Product Description

The BS805MD is a rugged electrochemical pH / ORP sensor assembly from the Foxboro analytical instrumentation portfolio. It is engineered for high-accuracy continuous liquid analysis in industrial process environments where conventional laboratory sensors are prone to drift or premature failure.

The sensor integrates a high-impedance preamplifier directly at the electrode, converting low-level millivolt signals into a stable, noise-resistant output before transmission to the analyzer. This design significantly improves signal integrity in electrically noisy plants. The chemically resistant construction and modular mechanical design support long service life, simplified maintenance, and reduced lifecycle cost.

Technical Specifications

Application

The BS805MD is commonly used in continuous liquid analysis applications, including:

• Industrial wastewater neutralization systems

• Cooling tower and boiler water chemistry monitoring

• Chemical batch and continuous processing

Its sensor-head preamplification makes it especially suitable for installations with high electromagnetic noise, long cable runs, or fluctuating ambient conditions.

Frequently Asked Questions

Q: How frequently should the BS805MD be calibrated?
A: Calibration frequency depends on process conditions. Weekly calibration is recommended for harsh chemical services, while monthly calibration is typically sufficient for clean water applications.

Q: Can the preamplifier be replaced independently?
A: The BS805MD is generally supplied as an integrated, environmentally sealed assembly. This design ensures long-term stability and reliability, particularly in high-humidity or corrosive environments.