Inventor

FENG CHANG-DONG

US28 patents

⚠️ This page may combine multiple inventors who share the name “FENG CHANG-DONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FENG CHANG-DONG

ROSEMOUNT ANALYTICAL INC

Flow-through conductivity sensor

pH sensor with internal solution ground

Amperometric sensor for low level dissolved oxygen with self-depleting sensor design

Chloramine amperometric sensor

Standard solution with cleaning reagent for wet chemistry analyzer

pH sensor for single use equipment

System for calibrating dissolved oxygen analyzers using compressed fluids during cleaning

Conductivity sensor and manufacturing method therefor

Amperometric sensor for low level dissolved oxygen with self-depleting sensor design

Free chlorine sensor

Multiple wavelength light source for colorimetric measurement

Photometric measurement cell

ROSEMOUNT INC

Single-use bioreactor sensor interface

Single-use bioreactor port with multiple sensors

Colorimetric analyzer with de-bubbling

On-line wet chemistry analyzer

Colorimetric analyzer with reagent diagnostics

BROADLEY JAMES CORP

Reinforced gas-permeable membrane and reinforced gas-permeable well utilizing same

Sensing element for use with media-preserving storage and calibration chamber

Sensing element for use with media-preserving storage and calibration chamber

Sensor with rotatable sensor element and pressure equalization mechanism

FENG CHANG-DONG

Detachable dissolved oxygen sensor for single use bioreactor/mixer

pH sensor integration to single use bioreactor/mixer

Unitary plastic conductivity sensor

TELEDYNE TECH INC

Electrochemical gas sensor and method of making the same

REZVANI BEHZAD

Impedance measurement of a pH electrode

TELEDYNE IND

Electrochemical gas sensor

ROSENMOUNT ANALYTICAL INC

High purity water pH sensor with shielded flowing liquid junction