In-line Propilen Glikol Monitörü CM-BASEα-88S

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Atago CM-BASEα-88S In-line Propylene Glycol Monitor (In-line Refractometer)

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Concentration measurement range: 0.0-90.0%, accuracy ±0.4%
Freeze point measurement: -50°C to 0°C, accuracy ±1°C
Wide ATC range: 10-95°C, temperature precision ±0.2°C
4-20mA and RS-232C output options for seamless system integration
Second popular model in the RRI-approved CM-BASEα series
No IP65 protection — enclosed/controlled environment installation required

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CM-BASEα-88S is an Atago brand refractometric monitor designed for continuous in-line measurement of propylene glycol concentration and freeze point in HVAC cooling systems, food/beverage processing, and industrial process lines. The instrument delivers real-time data to operators through direct measurement without sampling from the process. The unit measures concentration in the 0.0-90.0% range with ±0.4% accuracy and freeze point between -50°C and 0°C with ±1°C accuracy; both values are calculated from a single sensor. A wide 10-95°C ATC (automatic temperature compensation) range with ±0.2°C precision ensures stable measurement across variable process temperatures. 4-20mA and RS-232C outputs enable seamless integration with SCADA/PLC systems. The product lacks IP65 protection, making it suitable for controlled, enclosed environment installations; additional enclosure may be required in open/humid fields. For HVAC chiller and heat pump systems requiring freeze protection, food-beverage industries needing food-grade PG control, and chemical/process cooling lines requiring continuous monitoring, this instrument offers a practical solution. As the second popular model in the RRI-approved CM-BASEα series, it adapts proven refractometric measurement technology for in-line application.

Technical Specifications

Manufacturer	Atago
Model / Catalog No.	CM-BASEα-88S / 3778
Concentration Range	0.0-90.0%
Concentration Resolution	0.1%
Concentration Accuracy	±0.4%
Freeze Point Range	-50~0°C
Freeze Point Resolution	1°C
Freeze Point Accuracy	±1°C
ATC (Temperature Compensation) Range	10-95°C
ATC Precision	±0.2°C
Output	4-20mA, RS-232C
IP Protection Class	No IP65

Applications

Freeze protection control in HVAC chiller and heat pump systems
Food-grade propylene glycol cooling lines in food and beverage industries
Continuous concentration/freeze point monitoring in industrial process cooling systems

Frequently Asked Questions

Does the CM-BASEα-88S measure both concentration and freeze point simultaneously?

Yes, refractive measurement acquired from a single in-line sensor simultaneously calculates both propylene glycol concentration (%) and freeze point (°C).

What does the absence of IP65 protection mean?

The instrument does not provide IP65-level protection against water splash or dust; additional enclosure or installation within a closed control panel is recommended for open field or humid/dusty environments.

What is the practical benefit of the 10-95°C ATC range?

It provides automatic compensation with ±0.2°C precision across a broad temperature span from cold storage to high-temperature process lines, enabling a single unit to cover diverse process conditions.