Description
Elastronics QL-CDDC-3/HR Dielectric to Density Computing Converter BNC
The Elastronics QL-CDDC-3/HR is a bench-top dielectric-to-density computing converter manufactured by Ellastronics of Tarzana, California. This instrument takes a dielectric (capacitance-based) input signal from a sensor and computes a corresponding density value, displaying the result on a calibrated analog DC voltmeter. It is a compact, self-contained signal-conditioning and computing unit designed to interface with a dielectric sensor via its multi-pin J-I circular connector and output a proportional DC voltage signal via its rear BNC connector.
Specifications & What's Included
- Manufacturer: Elastronics (Ellastronics), Tarzana, California
- Model: QL-CDDC-3/HR
- Function: Dielectric to Density Computing Converter
- Display: Simpson analog panel meter — DC Volts, 0–5V scale, FSr 100µA
- Input connector: Multi-pin circular connector (J-I)
- Output connector: BNC
- Front panel controls: ZERO adjust, PUSH TO ADJ SPAN (x2), ρ (rho) toggle switch, PWR ON toggle switch
- Indicator: Red pilot lamp (PWR ON)
- Enclosure: Brown wrinkle-finish steel benchtop chassis
- Power: AC-powered via attached gray power cord (hardwired)
- Included: Unit with attached AC power cord
- Not included: External dielectric sensor or probe
Applications
Dielectric-to-density converters like the QL-CDDC-3/HR were used in industrial process measurement and laboratory applications where the dielectric constant of a material — typically a liquid, slurry, or granular substance — serves as a proxy for its density or concentration. By measuring capacitance change across a sensor immersed in or exposed to the material, the instrument computes and outputs a proportional signal that can drive a recorder, controller, or display. This type of instrument was commonly used in food and chemical processing, paper and pulp production, petroleum refining, and materials research, where continuous non-contact or minimally invasive density measurement was required. Elastronics was a small California-based instrumentation company; the QL-CDDC-3/HR appears to date from the 1960s to early 1970s based on its construction style, Simpson meter, and multi-pin circular connector format. Today these units are primarily of interest for legacy process systems still running original sensor loops, laboratory research, or vintage instrument collectors.
This Elastronics QL-CDDC-3/HR Dielectric to Density Computing Converter has been inspected and is in good used condition. The brown wrinkle-finish metal enclosure shows moderate wear including paint chips and scuffing on the corners and top edges, consistent with age. The front panel is intact with all controls — ZERO, PUSH TO ADJ SPAN, ρ toggle, and PWR ON toggle — present and the Simpson DC Volts analog meter and red pilot lamp are undamaged. The multi-pin J-I circular input connector and BNC output connector are present. The attached AC power cord is included. No external sensor or probe is included. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Elastronics |
Model: |
QL-CDDC-3/HR |
MPN: |
QL-CDDC-3/HR |
Type: |
Dielectric to Density Computing Converter |
SKU: |
39738 |
Condition: |
Used – Inspected |
Seller Notes: |
Includes attached AC power cord. No sensor or probe included. |
Country/Region of Manufacture: |
United States |
Form Factor: |
Benchtop |
Meter Type: |
Simpson DC Volts Analog Panel Meter (0–5V, FSr 100µA) |
Output Connector: |
BNC |
Input Connector: |
Multi-pin circular (J-I) |
Front Panel Controls: |
ZERO, PUSH TO ADJ SPAN, ρ (rho) toggle, PWR ON toggle |
Indicator: |
Red pilot lamp (PWR ON) |
Application: |
Dielectric measurement / density computation |
Manufacturer Location: |
Tarzana, California |
Condition Notes: |
Elastronics QL-CDDC-3/HR Dielectric to Density Computing Converter. Inspected, good used condition. Enclosure shows paint chips and corner wear. All front panel controls and connectors present. AC power cord included. No sensor/probe included. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |