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Varec 6600

Non-Powered Mechanical Level Indicator

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Varec 6600

The Varec® 6600 Liquid Level Indicator is designed for field operators, production engineers, environmental compliance managers, and EPC teams working with frac tank batteries, portable treatment skids, and remote production sites that need continuous, ground-level tank level visibility without electrical infrastructure.

Unlike powered radar or ultrasonic transmitters that depend on field wiring, battery maintenance, or solar kits, the 6600 LLI is a sealed float-and-cable device that drives a bright orange indicator through a clear polycarbonate tube mounted on the tank exterior — no power, no calibration, and no atmospheric opening.

A 316 stainless steel float and 7×7 stainless cable move the indicator in real time as product level changes, with ½-ft scale increments and approximately 1 in (25 mm) resolution across up to 8 ft (2.4 m) of travel. Severe service and all-316 SS configurations extend the device into corrosive and chemically aggressive liquids.

The 6600 LLI is engineered for installation on in-service or out-of-service mobile tanks, supporting rapid deployment on working frac batteries, production skids, and portable clarifiers. Ground-level readability removes routine climbing and fits naturally within site programs like EPA SPCC and NFPA 30 that rely on basic, verifiable tank visibility.

Varec 6600
Varec 6600
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Features

Non-Powered Operation

A mechanical float-and-cable drive provides continuous level indication without electricity, batteries, or field wiring, keeping the gauge working wherever the tank travels.

Sealed Gauge Tube

The clear polycarbonate tube is fully sealed against dust, rain, and ambient vapor, protecting the indicator and keeping the device closed to atmosphere.

Ground-Level Readability

A bright orange indicator reads clearly from grade against a ½-ft scale, eliminating routine climbs and supporting safer field checks on mobile tanks.

In-Service Installation

Engineered for installation on active frac batteries and production skids without emptying the tank, minimizing downtime during deployment and relocation.

Stainless Wetted Components

Type 316 stainless steel float and 7×7 cable resist corrosion across petroleum, water, and mild chemical service, with severe-service configurations for aggressive liquids.

Field-Hardened Hardware

Low-pressure 90° elbows, Delrin sheaves, steel or optional 316 SS anchors, and Teflon wipes deliver long service life in dusty, weathered, and outdoor installations.

Applications

  • Frac Tank Monitoring: Crude, flowback, produced water, and treatment liquids at active well-site frac batteries get continuous ground-level visibility without running power to each tank.
  • Portable Treatment Skids: Mobile clarifiers, separators, and mix tanks need rapid deployment; the 6600 LLI installs in service so skids stay on line while indication is added.
  • Remote Production Sites: Where electrical infrastructure is inconsistent or absent, a sealed mechanical indicator keeps level visible for field operators without batteries or solar.
  • Mobile Tank Inventory: Reduces measurement gaps during routine inventory checks by giving every tank a visible, independent level reference readable from the ground.
  • Corrosive Liquid Storage: All-316 SS and severe-service configurations handle aggressive chemistries where standard stainless components would pit, corrode, or foul.
  • Spill-Prevention Programs: Continuous, ground-level visibility fits within EPA SPCC and NFPA 30 site programs that rely on verifiable tank level as part of spill-prevention practice.
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Specifications

Parameter

Specification

Operating Range

Up to 8 ft (2.4 m) of measurement travel

Display Scale

½-ft increments along the gauge tube

Indicator Resolution

~1 in (25 mm) under typical conditions

Gauge Tube

Clear polycarbonate with vinyl numbering; fully sealed

Float

14.5 in diameter, Type 316 stainless steel

Cable

7×7, 3/32 in diameter, Type 316 stainless steel

Elbows & Sheaves

Low-pressure 90° elbows, aluminum housings, Delrin sheaves

Anchoring Hardware

Standard steel anchors; optional 316 SS upgrades

Configurations

Standard, severe service, and all-316 SS wetted parts

Accessories

Manways, inspection covers, grounding kits, Teflon tape wipes, extension brackets, shock absorbers

Power

None (fully mechanical)

Atmospheric Venting

Not open to atmosphere — sealed construction

Installation

In-service or out-of-service mobile tank installation

Contact Support
2026 COST ESTIMATE

Contact Support

If you have questions not covered here, please contact the Cognesense support team for assistance.

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Does the 6600 LLI require electrical power?

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No. The 6600 LLI is fully mechanical — a 316 stainless steel float drives a cable that moves the indicator in the gauge tube. No power, batteries, or wiring are needed for the measurement itself.

How precise is the reading?

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The indicator shows level along the gauge tube with approximately 1 in (25 mm) resolution against a ½-ft scale. This is a visual indication device — always convert level to volume using the tank chart for inventory purposes.

Can the 6600 LLI be installed on an in-service tank?

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Yes. The device is engineered for installation on in-service or out-of-service mobile tanks, which keeps frac batteries and production skids on line while level indication is added. Contact Cognesense to confirm the appropriate kit for the tank connection.

What materials contact the product?

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Standard units use Type 316 stainless steel for the float and 7×7 cable. Severe service and all-316 SS configurations are available for corrosive or chemically aggressive liquids.

Is the gauge tube open to atmosphere?

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No. The clear polycarbonate gauge tube is fully sealed, protecting the indicator from dust, rain, and ambient conditions and keeping the device closed to atmosphere during operation.

What measurement range does the 6600 LLI cover?

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Up to 8 ft (2.4 m) of measurement travel, read on a ½-ft scale. That band fits the majority of frac tanks, mobile treatment skids, and small remote production tanks.

Is the 6600 LLI suited to outdoor field service?

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Yes. The sealed polycarbonate tube, stainless wetted components, and field-hardened elbows, sheaves, and anchors are designed for continuous outdoor service on mobile and temporary installations.

Where does the 6600 LLI fit alongside electronic level devices?

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The 6600 LLI is a standalone visual indicator for sites where power is impractical. When electronic indication is needed on the same fleet, the Varec 6700 LLI provides ground-level tape-style indication for larger tanks and longer ranges.

Summary

With over a century of tank gauging heritage, Cognesense brings the Varec 6600 Liquid Level Indicator to frac batteries, portable treatment skids, and remote production sites that need reliable level visibility without electrical power. A sealed polycarbonate tube, 316 stainless steel float and cable, and in-service installation make it a rugged, ground-readable indicator for mobile and temporary tanks, with severe service and all-stainless options for corrosive liquids — trusted wherever you need to measure, monitor, and protect what matters most.

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Measure.
Monitor.
Protect.