9704 Gen 4 R3D® Module

Maximize your fluid level detection capabilities with Rochester Sensors remote-read R3D modules. Incorporating a remote-read system allows you to monitor your fluid or fuel levels remotely, providing a reliable, safe, and convenient solution to track usage. The ratiometric voltage output from Rochester 9704 remote-read modules allows you to accurately measure tank levels and integrates easily into any automated monitoring system.

Application
The Rochester 9704 module snap-fits into the recess of your existing Rochester Sensors R3D remote-ready dial lens to provide a low power, cost-effective solution to transmit fluid levels. The sensors detect the position of the fluid level indicator in the dial it is attached to. Using the module’s onboard microprocessor, this positional data is converted to a ratiometric voltage output (0V to VCC) dependent on the supply voltage. This output voltage can be utilized by the end user’s wired, or wireless monitoring device to transmit the fluid level inside a tank. Corresponding voltage-out to percentage-full tables are available for all Rochester R3D dials. 9704 Modules require a 3-5VDC input and have a very low current draw that is excellent for battery powered applications.

General Information & Features

• Cable length up to 25ft max (6 ft. standard length) with flying leads
• 22AWG – 3 Conductor Cable for power (VCC), ground, and signal (Vout)
• Accuracy: Module output +/- 2% of visual dial indication. (Float gauge errors not included).
• Repeatability: +/- 1%
• Operational Voltage Range: 2.6 to 5.5 VDC
• Output Voltage: Ratiometric, percent of supply voltage
• Resolution: 0.018V
• Operating Current: 4mA Typical @ 5 VDC with 1M load on output
• Recommended Load Impedance: > 10k, 0.5nF for optimal performance
• Turn-on time: 5 mS Typical

Operating Temperature Range: 

• Dynamic -25°C to +80°C; Static -30°C to + 80°C
• Storage Temperature: -40°C to +105°C
• Ingress Protection: IP69K rated
• Intrinsically safe in explosive atmospheres

Product Construction
The 9704 product is centered around a position-sensing integrated circuit that works with existing R3D level dials. The sensor is available in both a 45-degree, side exit, and straight orientation. The custom printed circuit board, components, and all electrical connections are fully enclosed in a durable molded polyamide casing which provides excellent insulation and environmental protection. Alignment and snap-fit geometry are
integrated into the shape of the sensor to perfectly mate with the remote-read slots on all Rochester Sensors R3D dial faces. Interaction with the 9704 module is accomplished via a multi conductor jacketed cable. The
black 600V, 105°C cable is UL Recognized (21768) with a TPU jacket that is oil, water, UV, and cold resistant. The three internal 22 AWG stranded wires are colored for easy assembly into the end user’s monitoring device.

Product Function Overview
The 9704 module can be inserted into to any R3D dial face to detect the fluid level indicated. The sensor accomplishes this by detecting the direction that the level indicator is pointing on the dial. The 9704 module then converts this raw positional data to a percentage of the supply voltage. As fluid levels decrease, the voltage on the signal line will also decrease, proportional to the supply voltage. (Example: At 50% full tank level = the signal voltage will read approximately half of the supply voltage level.) See dial tables for more specific voltage-to-percentage conversions. The 9704 modules use a 3-wire cable to connect to the user’s
monitoring system: supply voltage (3-5V), ground, and ratiometric Vout signal.

Documents
9704 Data Sheet
9704 Installation Guide
0115-0113
0115-01194
0115-0119
WD-580

Reference the following documents for nominal output voltages corresponding with dial graduations: DS-1828: ASME Horizontal Tanks, Vertical Tanks/DOT Cylinders, and Industrial Tanks (Fractional)

Reference DS-2010A for module installation instructions