OTC 4278 Hydraulic Flow Meter
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OTC 4278 Hydraulic Flow Meter
The OTC 4278 Hydraulic Flow Meter is a professional-grade diagnostic tool designed to measure flow, pressure, and temperature in hydraulic systems up to 100 GPM. Built with rugged steel housing and precision components, this flow meter allows technicians to troubleshoot pumps, valves, motors, and cylinders with confidence. A built-in loading valve provides adjustable back pressure for realistic system testing under load, while bi-directional flow capability ensures accurate readings in either direction.
Ideal for use in heavy equipment repair, agricultural machinery service, and industrial maintenance applications, the OTC 4278 helps identify inefficiencies, internal leakage, and performance issues quickly. Its ±1% flow accuracy and ±1.6% pressure accuracy make it a reliable choice for shops that demand precision and durability.
OTC 4278 Specifications
| Flow Range | 2.5 – 100 GPM |
| Pressure Range | 0 – 6,000 PSI (0–420 bar) |
| Accuracy – Flow | ±1% of indicated value |
| Accuracy – Pressure | ±1.6% of full scale |
| Port Connections | 1-5/16” – 12 UN #16 SAE ORB |
| Construction | Steel case with aluminum base block; burst-disc overpressure protection |
| Flow Direction | Bi-directional |
| Dimensions | Approx. 9.45 × 7.87 × 7.87 in. |
| Weight | Approx. 14 lbs |
Please verify product compatibility with your equipment before purchase and installation.