Products

MDS-7200-PG Inline Propylene Glycol Refractometer

The MDS-7200-PG is an inline refractometer for real-time propylene glycol concentration monitoring. Featuring an ultrasonic self-cleaning probe, automatic temperature compensation, 1 MPa pressure resistance, and IP67 protection, it ensures long-term stable operation. With 4-20mA and RS485 outputs, it delivers reliable automated process control.

E-mail:info@madsurgroup.com

Send

-Product Overview-

The MDS-7200-PG Inline Propylene Glycol Refractometer uses refractive index measurement to enable real-time online monitoring of propylene glycol concentration, making it suitable for process control in industries such as medicine. The device features a built-in ultrasonic cleaning probe that automatically removes buildup from the optical window, ensuring stable long-term operation. It also offers flow cell installation options, supporting submerged or pipeline bypass layouts. With flexible installation methods, it can adapt to threaded, flanged, and clamped interfaces, and supports customized connections.

The instrument is equipped with temperature compensation to accommodate medium temperatures from 0 to 100°C, a pressure resistance rating up to 1MPa, and good environmental adaptability. Output signals include standard 4–20mA analog output and an RS485 digital interface, with options to customize other protocols for easy integration with control systems. The measurement section has an IP67 protection rating, making it suitable for humid or mildly dusty field conditions. Its compact structure and rapid response enable uninterrupted concentration monitoring, effectively replacing manual sampling and testing, and enhancing the timeliness and reliability of process control.

-Key Features & Benefits-

1. Continuous online monitoring of propylene glycol concentration based on the refractive index measurement principle, replacing manual sampling and testing.
2. Equipped with a standard ultrasonic cleaning probe to automatically clear optical window deposits, effectively maintaining long-term measurement stability.
3. Supports flow cell installation and is compatible with threaded, flanged, and clamped connection forms for easy integration into different pipelines.
4. Provides analog current signals and digital communication interfaces, with customizable output protocols to adapt to various control systems.
5. Features temperature compensation to automatically correct the impact of temperature fluctuations on concentration readings, ensuring reliable measurement results.

-Technical parameters-

Measurement Range	Propylene Glycol: Quality 0.0–100.0%, -1.0–73.0%; Volume -1.0–101.0%, 1.0–73.0%; Boiling Point 99.9–112.0%; Freezing Point -94.0–33.0%
	Refractive Index: Quality 1.32661–1.43972, 1.33050–1.41211; Volume 1.33050–1.44300, 1.33050–1.41211; Boiling Point 1.33000–1.41211; Freezing Point 1.33050–1.41211
	Temperature: 0°C ~ 100°C (customizable up to 150°C)
Measurement Accuracy	Brix: ±0.20%
	Refractive Index: ±0.00030
	Temperature: ±0.5°C
Resolution	Brix: 0.1%
	Refractive Index: 0.0001
	Temperature: 0.1°C
Output	Analog Output: 4~20mA corresponding to Brix concentration -1.0 ~ 57.0% (Customizable)
	Digital Output: RS485
	Other output methods are customizable
Input	DC 24V ±10%, Current <100mA
Measurement Time	Default: 1 measurement per second
Ambient Temperature	0.0~60.0°C
Sample Volume	Immersion measurement
Pressure Resistance	0.6MPa
Protection Rating	Measurement section: IP67
Installation Method	Threaded, flanged, clamp, etc., customizable

MDS-7200-PG Inline Propylene Glycol Refractometer.pdf