Cognesense - Measure, Monitor, Protect

Cap Analog 410

The Cap Analog 410 is designed for process engineers, plant operators, and instrumentation specialists who require a continuous, reliable, and cost-effective level transmitter for liquids, slurries, or bulk solids in chemical, food processing, and wastewater facilities.

The transmitter delivers proven RF capacitance measurement technology in a rugged, explosion-proof design.

Unlike conventional transmitters that may drift, foul, or lose accuracy over time, the Cap Analog 410 integrates shielded amplifier circuitry, coating-rejection electronics, and independent zero/span calibration. This ensures stable analog output and long-term reliability in demanding environments.

With analog output options (4–20 mA or 0–10 V DC), a universal power supply, and probe options up to 250 ft (76 m) in length, the Cap Analog 410 is suitable for storage tanks, process vessels, silos, and sumps. It provides maintenance-free measurement across a wide dielectric range, from light hydrocarbons to conductive slurries.

Cap Analog 410 RF Capacitance Level Transmitter

Applications

Viscous Liquids and Slurries: RF capacitance measurement tolerates buildup and fouling, providing consistent accuracy where mechanical sensors may drift or fail.
Bulk Powder Storage: Probe-based measurement delivers reliable level detection in silos, avoiding wear and hang-up issues associated with mechanical sensors.
Hazardous Locations: Explosion-proof housing meets NEC Class I Division 1 requirements, ensuring safe operation in hazardous industrial environments.
Large Storage Tanks: Probe lengths up to 250 ft enable accurate measurement in tall tanks and deep storage vessels.

Technical Specifications

Parameter

Description

Measurement Technology

RF capacitance with integral electronic amplifier

Output Signal

4–20 mA DC (isolated) or 0–10 V DC

Power Supply

115 VAC (90–135 V), 230 VAC (180–279 V), or 24 V DC (15–28 V)

Power Consumption

Less than 3 VA

Frequency

50–60 Hz

Electronics Temperature Range

–40 °F to +160 °F (–40 °C to +71 °C)

Zero Adjustment Range

10 – 2,000 pF (standard), extended via DIP switch

Span Range

Low: 50–1,000 pF; High: 800–10,000 pF

Stability

±0.5 pF per 30 °F (maximum sensitivity)

Build-Up Tolerance

Up to 1,000 µmho conductivity coating

Probe Options

Teflon®, Kynar®, stainless steel, or dual-probe configurations; lengths up to 250 ft

Mounting

¾ inch NPT standard; optional flange or Tri-Clover sanitary connection

Housing

Cast aluminum with polyester finish

Enclosure Rating

NEMA 4, 5, 7, 9, 12

Hazardous Area Certification

CSA / NEC Class I Groups C and D; Class II Groups E, F, G

Coating Rejection

Integrated electronics support coatings up to 1,000 µmho conductivity

Accessories

Delavan AFI-150 / DFI-150 field indicators and remote displays

2026 COST ESTIMATE

Support

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

What measurement technology does the Cap Analog 410 use?

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It uses RF capacitance technology to convert dielectric changes between a probe and reference ground into a continuous analog signal.

Is the Cap Analog 410 suitable for hazardous environments?

Yes. Its cast-aluminum, explosion-proof housing meets NEMA and CSA/NEC Class I Div 1 and Class II Div 2 standards.

How is the transmitter calibrated?

Independent zero and span adjustments allow quick, precise field calibration without interaction or drift.

Can it measure sticky or viscous materials?

Yes. The built-in coating rejection circuit maintains accuracy even with buildup on the probe.

How does it handle buildup or coating on the probe?

The Cap-Analog 410 uses a specialized shielded amplifier and coating rejection circuit. This advanced design is able to differentiate between the capacitance of the actual product level and the capacitance caused by buildup (up to 1,000 µmho conductivity coating) on the probe, ensuring the reported level remains stable and accurate.

What power supply options are available?

It supports 115 VAC, 230 VAC, or 24 V DC inputs, making it universally compatible with plant standards.

What probe types are offered?

Teflon®, Kynar®, and stainless-steel probes are available for chemical, food-grade, or high-temperature service.

Can it be used with both conductive and non-conductive liquids?

Yes. The device features a wide dielectric range of 10 – 10,000 pF, making it highly versatile. It can accurately measure light, non-conductive hydrocarbons (low dielectric) as well as conductive liquids, slurries, and water-based solutions (high dielectric).

What advantages do independent zero and span adjustments provide?

Independent Zero and Span adjustments allow field technicians to precisely set the minimum (Zero) and maximum (Span) output signals without one adjustment affecting the other. This significantly simplifies the calibration process, especially when commissioning in the field, reducing errors and saving time.