Thermo Scientific™

DDG3 Digital Density Gauge

Ensure accurate process control and optimize productivity in the processing of industrial liquids and slurries with the DDG3 Digital Density Gauge, with the new DDG3 controller.

產品號碼	Circuitry
AM870	16 bit microprocessor, 32K memory, Analogue I/O 12 bit resolution, 4 line transflective backlit LCD, LED indicators on all I/O, 16 key Tactile membrane

產品號碼 AM870

價格 (TWD)

Circuitry:

16 bit microprocessor, 32K memory, Analogue I/O 12 bit resolution, 4 line transflective backlit LCD, LED indicators on all I/O, 16 key Tactile membrane

The Thermo Scientific™ DDG3 Digital Density Gauge is a non-intrusive, non-contact device for accurate density or percent solids measurement for liquids and slurries flowing in a pipe. Equipped with a range of communication protocols, it is especially suitable for applications involving highly toxic, highly corrosive materials or processes operating at elevated temperature. The DDG3 is easy to install and used across the mineral processing, petrochemical, coal, food, water treatment, and pulp/paper industries to support efficient process control and optimize productivity.

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The DDG3 is a nucleonic density gauge that is installed on the outside of a pipe - no shutdown required - to provide reliable data for robust process control: Key features include:

Non-intrusive measurement, for applications involving high temperature and/or highly toxic or highly corrosive materials
High performance microprocessor electronics, for reliable operation over the long-term
Sensitive scintillation detectors, for accurate measurement with lower strength isotopes
Rugged construction, for use in harsh environments
User friendly menu driven display, for easy set-up and calibration
Suitable for pipes up to 1000 mm in diameter
Auto source decay compensation, for enhanced long-term performance.

Certifications/ComplianceIP66, CE

Circuitry16 bit microprocessor, 32K memory, Analogue I/O 12 bit resolution, 4 line transflective backlit LCD, LED indicators on all I/O, 16 key Tactile membrane

Housing MaterialController Assembly: Stainless Steel (316) IP66
Detector Assembly: Epoxy-coated Mild Steel or optional Stainless Steel
Source Housing: Epoxy-coated Mild Steel over Lead or optional Stainless Steel

InputsOne 4 to 20 mA current loop input for flow meter
One 4 to 20 mA current loop input for temperature

Interface Cable2 pair, overall shielded, 10 m standard, up to 1000 m maximum

Mounting HardwareController: Wall mount

Operating Temperature RangeDetector Assembly: 0°C to +60°C (+32°F to +140°F)
Controller Assembly: 0°C to +55°C (+32°F to +131°F)

OutputsTwo 4-20 mA programmable current loop outputs
Voltage free contact for remote alarm rated 220 VDC, 250 VAC, 2 A max
Voltage free contact for remote totaliser rated 220 VDC, 250 VAC, 2 A max

Power Supply24 VDC, 110/230 V, 50/60 Hz, 10 W

Product LineAM870

ProtocolsModBus RTU, ModBus TCP (standard)
HART, Profinet, Ethernet I/P (optional)

Weight (English)Detector Assembly: 55 lb.
Controller Assembly: 11 lb.
Source Housing: 95 lb.

Weight (Metric)Detector Assembly: 25 kg
Controller Assembly: 5 kg
Source Housing: 42 kg

Detector TypeNAI scintillation detector

Gamma Ray Source TypeCs-137 or Co-60

Product TypeHigh Performance Density Gauge

Unit SizeEach

常見問答集 (常見問題)

What should I consider when selecting a process density gauge?

When choosing a density gauge, consider:

Process fluid (liquid or slurry) density range
Pipe material type and diameter
Operating and ambient temperature
Required measurement range
Accuracy and update time requirements
Available plant communication protocols
Access for operation, maintenance, calibration and verification
Whether the application benefits from a non-intrusive measurement approach

For abrasive, corrosive, toxic, or difficult to access process lines, a non-contact nucleonic density gauge like the Thermo Scientific DDG3 Digital Density Gauge is designed to provide reliable, continuous measurement with minimal maintenance and no process interruption during installation.

How does the Thermo Scientific DDG3 Digital Density Gauge maintain long term measurement accuracy?

The Thermo Scientific DDG3 Digital Density Gauge incorporates high-performance microprocessor electronics, sensitive NaI scintillation detectors, automatic gain stabilisation and automatic source decay compensation. These features help maintain consistent measurement performance over the life of the radioactive source while helping reduce the need for frequent recalibration or maintenance.

Is the Thermo Scientific DDG3 Digital Density Gauge suitable for harsh industrial environments?

Yes. The Thermo Scientific DDG3 Digital Density Gauge is engineered for demanding process environments. Its controller (transmitter) features an IP66-rated enclosure, while the detector and source assemblies are built for reliable long-term operation in dusty, wet, and challenging industrial conditions. The system is designed for reliable operation in applications involving abrasive slurries, corrosive chemicals, and elevated process temperatures.

What communication protocols does the Thermo Scientific DDG3 Digital Density Gauge support?

The Thermo Scientific DDG3 Digital Density Gauge is designed for integration into modern industrial automation systems. Standard communication options include Modbus RTU and Modbus TCP. Optional protocols include HART, PROFINET, and EtherNet/IP, allowing straightforward integration with PLCs, DCS platforms, and plant control systems.

Can the Thermo Scientific DDG3 Digital Density Gauge measure percent solids as well as density?

Yes. The Thermo Scientific DDG3 Digital Density Gauge can be calibrated to measure process density and percent solids, depending on the application. Its 4-line display can be configured to show 3 readings from your choice of 5 measurands. These choices of measurands are also available for its two programmable current loop outputs and over serial and Ethernet protocols. This makes it especially valuable in plants where maintaining the correct solids concentration is critical for process quality, throughput, and energy efficiency.

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