Product Overview
The Graco/Lubriquip 527-003-250 is a high-quality inductive proximity switch, a critical sensor component specifically designed for integration into Graco’s Lubriquip centralized automatic lubrication systems. This device plays a fundamental role in providing reliable machine state feedback by detecting the presence or absence of metallic targets, typically a moving part of the machinery being lubricated, such as a shaft, cam, or gear tooth. The core function of the Graco/Lubriquip 527-003-250 is to generate a precise electrical signal that informs the lubrication system controller about the operating status (running or stopped) of the monitored equipment. This information is essential for implementing “on-demand” or cycle-based lubrication strategies, ensuring lubricant is dispensed only when the machine is in operation, which optimizes lubricant usage, reduces waste, and prevents under or over-lubrication.As a dedicated component within the Lubriquip ecosystem, the 527-003-250 proximity switch is engineered for the demanding conditions of industrial environments. Its design prioritizes durability, sensing accuracy, and seamless compatibility with Lubriquip pump and control units. By providing a dependable binary signal (on/off), this switch enables the lubrication system to operate intelligently, synchronizing lube cycles with actual machine runtime. This not only enhances the precision of the lubrication process but also contributes directly to machinery health, reducing wear, preventing bearing failures, and extending the service life of critical assets. The Graco/Lubriquip 527-003-250 is therefore more than just a sensor; it is an enabler of predictive and condition-based maintenance practices, forming a vital feedback link in a closed-loop lubrication control strategy.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 527-003-250 |
| Manufacturer | Graco / Lubriquip |
| Product Type | Inductive Proximity Sensor / Switch |
| Sensing Type | Non-contact, Inductive |
| Sensing Distance | Approximately 2.5mm to 5mm (0.1″ to 0.2″) – Target dependent |
| Output Type | Typically PNP (Sourcing) or NPN (Sinking) DC switching signal (Confirm from datasheet) |
| Output Configuration | Normally Open (NO) or Normally Closed (NC) |
| Supply Voltage | Commonly 10-30V DC |
| Current Rating | Typically up to 200mA |
| Housing Material | Nickel-plated brass or stainless steel |
| Sensing Face Material | PBT or similar engineering plastic |
| IP Rating | Typically IP67 (Dust-tight and protected against temporary immersion) |
| Operating Temperature | -25°C to 70°C (-13°F to 158°F) |
| Connection | Integrated 2-meter cable or quick-disconnect style |
Main Features and Advantages
Robust construction for harsh environments: The Graco/Lubriquip 527-003-250 is built to withstand the challenging conditions found in industrial settings such as manufacturing plants, mines, and mills. Its housing is typically constructed from rugged, corrosion-resistant metals like nickel-plated brass, offering excellent durability against physical impact, vibration, and exposure to lubricants, coolants, and washdown procedures. The high IP67 ingress protection rating ensures reliable operation even in dusty, damp, or oily environments, making it a dependable choice for long-term service.Precision and reliability in detection: This inductive proximity switch provides non-contact, wear-free sensing. Unlike mechanical limit switches, it has no moving parts to wear out, resulting in a much longer operational lifespan and maintenance-free operation. Its sensing characteristics are stable and repeatable, ensuring that the Graco/Lubriquip 527-003-250 consistently provides an accurate signal to the controller every time the target metal object passes within its sensing range. This reliability is paramount for preventing missed lubrication cycles.
