Lenz T-550-5 Hydraulic Tank Level Gauge with Temperature Display

Our review of the Lenz T-550-5 finds it a practical, no-nonsense solution for technicians and maintenance crews who need simultaneous fluid level and temperature data in one compact instrument. Built for industrial use, the gauge combines a clear, ultrasonic-welded polyamide sight tube with a calibrated thermometer readable in both Fahrenheit and Celsius, so operators can verify fluid condition at a glance. The single biggest reason to buy is its dual-monitoring capability paired with robust construction that stands up to hydraulic oils and other common fluids without adding complicated electronics to the tank.

Key Features

• Dual monitoring: Provides simultaneous fluid level and temperature readings so systems can be checked for both quantity and operating condition at the same time.
• High temperature tolerance: Rated to 200F (approx 93.33C), it handles elevated operating temperatures found in heavy hydraulic systems.
• Durable construction: Ultrasonically welded transparent polyamide and Buna-N o-ring seals offer chemical resistance and long-term durability in harsh environments.
• Standard mounting: Uses a 5-in bolt hole mounting with 1/2-13 thread for straightforward replacement or retrofit on compatible tanks.
• Compact and lightweight: Measures about 7in x 2in and weighs roughly 2 lb, making installation and service easier in crowded equipment bays.
• Shatterproof safety: Reinforced assembly with zinc-plated bolts and chemical-resistant components reduces leak and breakage risks.

Who It's For

The T-550-5 is aimed at maintenance technicians, hydraulic system installers, and facilities managers who need a rugged, field-proven sight gauge with a built-in thermometer for routine checks. It is especially useful in industrial settings, mobile equipment, and shop machinery where both level and temperature influence performance and safety.

Those who should look elsewhere include users needing electronic remote monitoring, digital logging, or nonstandard thread sizes; this is a mechanical, local-read instrument intended for hands-on inspection rather than telemetry.

Pros & Cons

Pros

• Simple dual-function design eliminates the need for separate level and temperature devices.
• Industrial-grade polyamide body and Buna-N seals resist many hydraulic fluids and chemicals.
• Clear markings in Fahrenheit and Celsius make readings quick and unambiguous for crews used to either scale.

Cons

• Provides only local, visual readings and no electronic output for remote monitoring or data logging.

Specifications

Product	Lenz T-550-5 Hydraulic Tank Level Gauge with Thermometer
Mounting	5-in bolt hole mounting, 1/2-13 thread
Temperature range	Up to 200F (approx 93.33C)
Body material	Ultrasonically welded transparent polyamide
Seals and hardware	Buna-N o-rings, zinc-plated bolts
Dimensions	Approx 7in x 2in
Weight	About 2 lb (0.9 kg)

Our Verdict

The Lenz T-550-5 is a solid, value-oriented choice for professionals who need reliable, on-site fluid level and temperature checks without electronics. Its industrial-grade materials and standard 5-in mounting make it a straightforward retrofit or replacement for hydraulic tanks, offering dependable service for shops and plant maintenance programs.

Frequently Asked Questions

Does this gauge read in both Fahrenheit and Celsius?
Yes, the display includes calibrated markings for both Fahrenheit and Celsius for immediate interpretation.

What fluids is the gauge compatible with?
It is suitable for hydraulic oils, lubricants, petroleum-based liquids, mineral oils, and water-based solutions as specified for industrial use.

Can it be used for remote monitoring?
No, the T-550-5 provides local visual readings only and does not include electronic output for telemetry.