Oil pressure gauge sandwich plates provide an integrated way to monitor oil pressure and temperature by tapping sensors between the engine block and the oil filter. This article spotlights five well-suited options for different engines and sensor setups. It’s ideal for DIY builders, performance enthusiasts, and technicians seeking reliable sensor ports without modifying the block. The top picks balance compatibility, number of ports, and ease of installation. Below is a quick summary table of the featured products to help you compare at a glance.
| Product | Thread Type | Ports | Best For |
|---|---|---|---|
| GlowShift Oil Filter Sandwich Plate Thread Adapter – 20mm x 1.5 | 20mm x 1.5 | 4 ports | Multiple sensors, smaller gasket diameter |
| CNWZYMX Oil Sandwich Plate – M20 x 1.5 | M20 x 1.5 | 4 ports | Real-time monitoring, universal fit |
| GlowShift Oil Filter Sandwich Plate Thread Adapter – 22mm x 1.5 | 22mm x 1.5 | 4 ports | Mid-size gasket compatibility |
| Ruilogod Blue Metal Oil Pressure Adaptor | Standard plate | – | Blue, simple plate for basic setups |
| GlowShift Oil Filter Sandwich Plate Thread Adapter – 3/4-16 | 3/4-16 | 4 ports | One of the common larger thread sizes |
GlowShift Oil Filter Sandwich Plate 20mm x 1.5 Thread
The GlowShift 20mm x 1.5 sandwich plate lets you install up to four 1/8-27 NPT oil pressure and/or oil temperature sensors between the engine block and oil filter. It includes an O-ring and port plugs for a leak-free seal. Best for engines with a 3″ or smaller gasket diameter on the oil filter. This plate is ideal for users who need multiple sensors without stacking adapters.
- Best for: DIY enthusiasts who require four sensor ports and a compact gasket footprint.
- Why chosen: It directly supports multiple 1/8-27 NPT sensors with a straightforward install between block and filter.
- Limitation: Requires a compatible oil filter gasket diameter ≤ 3 inches.
CNWZYMX Oil Sandwich Plate With M20 X 1.5
This CNWZYMX model uses a universal M20 x 1.5 thread and four 1/8 NPT ports, enabling simultaneous connections to oil cooling lines or sensor gauges. It emphasizes plug-and-play compatibility with most engines and supports oil temperature and pressure monitoring in real time. It’s a practical choice for users seeking a balance of port flexibility and broad engine compatibility.
- Best for: Anyone needing a four-port solution with broad engine compatibility.
- Why chosen: Real-time monitoring options and four ports support multiple sensors and gauges.
- Limitation: Some installations may require adapters for non-standard filter gaskets.
Ruilogod Blue Metal Oil Pressure Adaptor Plate
The Ruilogod blue metal adapter is a straightforward sandwich plate in a compact blue finish. It’s designed for ease of use and basic sensor integration. This option is best for buyers who want a simple plate to mount sensors or gauges without needing multiple ports, or who want a visually distinct plate for a custom install. A minimal approach can reduce potential leak points in tight engine bays.
- Best for: Basic sensor installations and aesthetic-coordinated builds.
- Why chosen: Simple, reliable plate for single-to-moderate monitoring tasks.
- Limitation: Fewer ports than four-port variants; verify compatibility with your sensors.
GlowShift 3/4-16 Thread Sandwich Plate
This GlowShift plate uses a 3/4-16 UNF thread with four 1/8-27 NPT ports, enabling multiple sensor connections between the engine block and the oil filter. It is designed for compatibility with common gasket sizes and provides a leak-free seal with the included O-ring. Choose this if your application requires a larger standard thread and multiple sensor ports.
- Best for: Vehicles with a 3/4-16 thread standard and need for multiple sensors.
- Why chosen: Combines a common thread size with four ports for flexible monitoring.
- Limitation: Requires compatible gasket diameter on your oil filter (≤ 3 inches).
CNWZYMX Oil Sandwich Plate Black
This CNWZYMX black-version sandwich plate mirrors its blue sibling with M20 x 1.5 threads and four 1/8 NPT ports for sensors. It emphasizes real-time monitoring and straightforward installation, suitable for most engine bays. Visual color distinction can help with sensor organization in complex installs.
- Best for: Color-coded sensor layouts and universal fitment needs.
- Why chosen: Four ports and familiar thread standard simplify upgrades.
- Limitation: Ensure gasket diameter compatibility with your specific oil filter.
Tongze Universal Oil Filter Sandwich Plate
Tongze offers a universal aluminum alloy sandwich plate with an anodized finish and three 1/8″ NPT ports for pressure, temperature sensors, or gauges. It emphasizes corrosion resistance and a secure rubber O-ring seal. Best for users who want a rugged, corrosion-resistant plate with straightforward port access.
- Best for: Corrosion-resistant builds and installations requiring clean sensor routing.
- Why chosen: Durable materials and multiple ports for sensor integration.
- Limitation: Some installs may need additional adapters for non-standard fittings.
Mishimoto MMOP-SP Oil Sandwich Plate
The Mishimoto MMOP-SP plate features a universal fit with two 1/8″ NPT ports and M20 x 1.5 ports, built from 6061 aluminum. Its compact size (3.15” x 2.8” x 1.11”) supports flexible sensor placement and temperature regulation. It is a practical choice for users who want a compact, reputable brand option with easy sensor additions.
- Best for: Compact builds needing reliable temperature control and port options.
- Why chosen: Brand reliability and compact design with standard port sizes.
- Limitation: Only two ports are pre-installed; additional ports may be required for more sensors.
Buying Guide: Oil Pressure Gauge Sandwich Plate Essentials
What should you consider when choosing an oil pressure gauge sandwich plate?
- Thread compatibility: Check the engine’s oil filter thread standard (M20 x 1.5, 3/4-16 UNF, etc.) to ensure a secure fit.
- Number of ports: Decide how many sensors or gauges you plan to monitor—plates with four ports offer the most flexibility.
- Port type and size: Ensure the ports match your sensors’ NPT fittings (commonly 1/8-27 NPT) for a leak-free installation.
- Gasket diameter compatibility: Many plates require the oil filter gasket to be 3 inches or smaller; measure before purchase.
- Material and finish: Aluminum plates balance durability and weight; anodized finishes can add corrosion resistance and color coding.
- Seal integrity: Look for included O-rings and port plugs to minimize leaks at the sandwich junction.
- Installation complexity: Some plates offer plug-and-play setups; others may need additional adapters or hoses.
Tips for Selecting the Right Plate
- For multiple sensors: Prioritize four-port plates from GlowShift or CNWZYMX for maximum expansion.
- For simple monitoring: A two-port solution may be sufficient and easier to install.
- For durability in harsh environments: Choose an anodized aluminum plate with a robust O-ring seal.
Practical Comparison Snapshot
- Best for sensor variety: GlowShift 20mm x 1.5 and GlowShift 22mm x 1.5 plates.
- Best all-around compatibility: CNWZYMX M20 x 1.5 plates.
- Best value aesthetic: Ruilogod Blue Metal Plate for basic installs.
FAQ
What is an oil filter sandwich plate?
It is a plate installed between the engine block and the oil filter that provides ports for oil temperature and pressure sensors or gauges.
How many sensors can I connect with these plates?
Most popular models support up to four sensors or gauges via 1/8-27 NPT ports.
Will these plates fit all engines?
Fit depends on the oil filter gasket diameter and thread compatibility; verify gasket size and thread type before purchase.
Why use a sandwich plate instead of direct sensor mounting?
A sandwich plate provides a centralized, leak-minimized mounting solution with multiple ports for sensors and gauges.
Are there any installation cautions?
Ensure proper sealing with the included O-ring, avoid overtightening, and confirm that the oil filter gasket diameter is compatible.
Do these plates affect oil pressure?
These plates do not directly alter pressure; they provide monitoring access without significantly impacting flow when installed correctly.