JRP Edge 3in1 Oil Pressure + Water Temp & Low Coolant Gauge 52mm

We are excited to introduce the JRP 3in1 52mm Oil Pressure & Water Temp Gauge, which also includes a crucial third function: engine low coolant detection & alarm. This gauge has quickly become one of the most requested additions to our lineup, following the success of our Edge Dual 52mm Boost & EGT gauge. It provides a true 3-in-1 solution by monitoring oil pressure, water temperature and alerting you to any loss of coolant in your radiator system. This combination is ideal for any vehicle, especially when paired with our Dual Boost & EGT gauge for diesel engines. Together, these two JRP 52mm gauges offer comprehensive monitoring for Boost, EGT, Water Temp, Oil Pressure, and Low Coolant Detection—a unique capability not found in any other 52mm gauge pair on the market.

After nearly two years of development, we proudly bring this industry-leading 3-in-1 gauge to market. Whether you're an off-road enthusiast or a performance street or track car driver, this gauge covers the most critical aspects of engine monitoring, ensuring you’re alerted to potential issues before they escalate into major problems.

For Diesel 4x4 owners, this 52mm 3-in-1 gauge is particularly valuable when combined with our 52mm Dual Boost & EGT gauge as mentioned above. With CPW (Colour Pre-Warn) technology, you’ll receive early colour changing warnings on the gauge via temperature when water temperatures begin to rise, same deal with EGT temperatures on our Dual 52mm, you will have the gauge change colour as EGT temps rise long before they reach a critical level. Additionally, monitoring oil pressure with this 3in1 ensures that your engine is properly lubricated and if there is ever a critical drop in pressure, they gauge is going to alert you, while the low coolant detection feature guards against any minor or critical loss of coolant, no matter the cause, being alerted to this early can be an engine saver.

Key Features

1. Water Temperature Monitoring with CPW Technology: This gauge includes our renowned Colour Pre-Warn (CPW) system, which provides early, color-coded warnings as water temperatures begin to rise, long before reaching critical levels. This technology enables proactive response and helps prevent overheating and engine damage.
    
2. Oil Pressure Monitoring: Ensures your engine remains properly lubricated. Any significant drop in oil pressure triggers an alert, protecting your engine from damage due to insufficient lubrication. Monitoring Oil Pressure on a lot of vehicles is very important, be it a Diesel or Petrol vehicle, this is a readout that some customers really need, and we are proud to have it included in this 3in1 gauge.
    
3. Engine Low Coolant Alarm: Equipped with a dedicated low coolant sensor, this gauge can instantly alert you if coolant levels drop, which is vital for preventing overheating. For example, if you hit a large rock during off-road driving and lose coolant, or pop off a radiator hose, or even a split in the hose, the low coolant sensor will trigger an immediate alarm, alerting you to the issue. Typically, this type of low coolant detection system alone would cost nearly $200, but with this JRP Edge 3-in-1 with Head Guard, it is built into the gauge at a price that is pretty much the same as if you were buying a low coolant alarm system by itself, just another amazing addition JRP has brought to the table to help our customers better care for their vehicles without having to spend a fortune.

Water Temp Readout 0-120c
Oil Pressure Readout 0-145psi
Low Coolant Detection System
Numeric & Scale Type Readout Displays
Colour Pre-Warn Feature
Configurable Warnings
Water Temp Warning – High
Oil Pressure Warning - Low
Engine Low Coolant Alarm
Peak Value Recoding
10-Colour Selectable LCD
3 Selectable opening & Closing Ceremonies
3 Outer Scale Display Type Selections
Daytime Brightness & Colour Selection
Night Brightness & Colour Selection

52mm Water Temp & Oil Pressure Gauge + Low Coolant
52mm Gauge Pod & Mounting Kit
U-Bracket Pillar Mounting Kit
2-Wire 3m 1/8 PT Water Temp Sensor
3-Wire 3m 1/8 PT Oil Pressure Sensor
2-Wire 3m 1/8 NPT Low Coolant Sensor
1m Remote Button Controller
1.5m Power Cable
20cm Power Link Cable

Why Choose the JRP Edge 52mm 3-in-1 Gauge?

The JRP Edge 52mm range is renowned for its CPW technology. This gauge provides proactive visual alerts through a three-stage colour change system, allowing you to monitor water temperatures using peripheral vision, without needing constant attention to the gauge. This reduces anxiety and allows you to "drive by gauge," knowing that the colour change will alert you if temperatures begin to approach dangerous levels.

If you already have a JRP Boost & EGT gauge in your 4x4, or looking at buying —whether as the dual gauge or individual EGT & Boost units —this 3-in-1 water temp, oil pressure, and low coolant detection gauge could be the final piece to complete your monitoring setup. You'll have comprehensive coverage of water temperatures, oil pressure, and coolant levels, with CPW providing early warnings. Unlike many market alternatives, which sell low coolant detection packages alone for nearly $200, our gauge includes this function alongside water temp and oil pressure monitoring, all at a competitive price.

Unmatched Value and Innovation

At JRP, we are incredibly proud of this 3-in-1 gauge. It embodies our commitment to quality, functionality, and innovation—all at a price point accessible to nearly every customer. We understand that no one wants to face a catastrophic engine failure or spend thousands of dollars on gauges to prevent it. That's why we've developed an affordable, powerful 3-in-1 gauge that offers protection for any engine, whether from the 1980s or a brand-new 2023 model. JRP is dedicated to protecting your vehicle, old or new.

COLOUR PRE-WARN

At JRP we are always trying to innovate, and with our deeper than most understanding of the intended use for a gauge and it’s practical function, we always ask ourselves in the development stages how can we make this better. It’s really the heart and soul of what we do here.

So when looking at our 52mm temperature based gauges, we asked ourselves once again how can we make these better for our customers, expand their practical functionality in ways that are actually useful. With the gauges using an incredible 10-colour LCD panel, our engineer put his thinking cap on and came up with a function we call Colour Pre-Warn or CPW for short. Typically gauges will come with one warning you can set and that is it, you would set the warning to go off at a level that is either right on the limit, or because you only have the one warning, you end up being conservative with it and set it lower because you would prefer being warned before it gets to out of control. This normally leads to having alarms going off all the time because you are cautious, or you end up getting sick of being cautious and set alarms a little too aggressively and end up letting a high temp situation get out of control and engine damage happens. We have all been there one way or another.

With the JRP Edge v1.5 temperature gauges, you now have a two stage warning system, one which works the same as other gauges where you set a final value for a warning that will trigger an alarm on the gauge, but now there is a softer secondary warning system you can choose to enable which will pre-alert you that the gauges are reaching higher levels than normal and alert you using the gauges bright colours.

So for example, you have chosen to run blue as your desired running colour for the gauge, set yourself a warning at 100c for water temp, if you enable the “colour pre-warn” function, once the gauge reaches 85c it will change from blue to yellow, and once it hits 90c it will change from yellow to orange, and once you hit 95c it will change from orange to red, and finally once you reach that 100c the gauge will sound an alarm.

The idea behind this is you get a visual non invasive indication that the temp gauge is moving out of normal operating parameters, this allows for a more aggressive final audible warning to be set, along with being visually alerted that your temps are starting to move into high territory’s without nasty loud alarms going off. You will be pre-warned by the gauge changing colour that things aren’t quite right and gives a larger margin for error in catching an event well before it happens.

Now just like everything we do here, we have put a decent amount of thought in how this little function was implemented and could be setup. You are able to customize the colours in the pre-warn function, you can select any 3 colours that you aren’t using as a running colour for the gauge for the warning system. You can also set how sensitive the colour pre-warn is in relation to your primary audible warning you set, we have really tried to make it so setup of this feature is simple, yet it can be customized to suit almost all applications.

We have a video demonstration of the feature in action on this page, just click the Videos tab at the top and you can check it out and see how it works. We feel this feature while sounding simple enough is actually going to become something that a lot of our customers will come to love, no more gauges alarms going off prematurely, no one likes premature alarms, less anxiety around looking at the gauges more than you need to making sure everything is ok and your ears aren’t about to get a pounding, we feel it will be one of those features that on paper you think that’s cool but almost a bit gimmicky, to using it and finding out that it’s been one of the best little innovations you have found in a gauge for years.

Low Coolant Sensor & Alarm

The JRP 3-in-1 52mm Gauge with Head Guard is designed with an innovative engine low coolant sensor that continuously checks your radiator system for any decrease in coolant levels. Should the coolant level drop below the standard operating range, the gauge instantly activates a low coolant alarm, giving you an early alert. This feature is particularly useful for off-road drivers who often face challenging conditions where rocks, debris, or other hazards can damage the radiator, resulting in a rapid coolant loss.

Why is Detecting Low Coolant Essential?

If coolant loss is not identified quickly, it can cause severe engine damage. Most vehicles do not have factory-installed low coolant sensors, but the JRP Head Guard feature ensures you are immediately informed of any issues. For instance, while off-roading, a rock could puncture your radiator, leading to either a slow or sudden coolant leak. Without a detection system, you could continue driving, causing the engine to overheat and potentially warp the cylinder head—a repair that could cost thousands. With Head Guard, you receive prompt alerts, allowing you to act quickly and prevent extensive damage.

Advantages of Head Guard Low Coolant Monitoring

• Timely Detection of Coolant Drops: The Head Guard system provides an early alert when coolant levels fall, enabling you to stop and assess the situation before it leads to serious engine damage. This is particularly important in avoiding overheating, which can result in expensive repairs or complete engine failure.
   
• Increased Protection for Off-Road Enthusiasts: For those who frequently navigate tough terrain, the Head Guard system offers peace of mind. It detects leaks caused by impact damage, such as rocks or branches, helping you prevent overheating and costly engine damage.
   
• Economical Engine Protection: Standalone low coolant detection systems can be priced at $200 or more. The JRP Head Guard integrates this vital feature directly into your water temperature gauge, providing a cost-effective solution.

Innovative Design with Real-World Benefits

At JRP, we focus on improving the safety and dependability of our customers' vehicles. The integration of a low coolant sensor and alarm within a water temperature gauge is just one of our many innovative solutions. This feature not only provides accurate water temperature readings but also offers the additional security of continuous coolant level monitoring.

Why Opt for the JRP Head Guard System?

• Avoid Expensive Repairs: Detect low coolant conditions before they turn into major issues, potentially saving you from engine rebuilds or replacements.
   
• Confident Driving Experience: Whether you’re off-roading in a diesel 4x4 or pushing a petrol vehicle on the track, the Head Guard system adds a vital layer of protection.
   
• Affordable and All-In-One: Benefit from a low coolant detection system without the need for separate, costly devices. The JRP Head Guard merges multiple functionalities into a single, compact gauge.

By selecting the JRP 3-in-1 52mm Gauge with Head Guard, you are choosing advanced engine protection that provides peace of mind, regardless of where your journey takes you.
 

3-Port Radiator Hose Adapter

When installing the Water Temp + Oil Pressure + Low Coolant gauge, our innovative 3-port hose adapter is the ideal solution for a smooth installation. This adapter is designed to accommodate the two required sensors—water temperature and low coolant—while leaving an extra port available for future enhancements or additional sensors.

Our 3-port adapter streamlines the installation process by consolidating the connection points into one location, reducing the complexity of sensor placement and wiring. These adapters are available in a range of sizes, from 28mm to 40mm, to suit a variety of engine types. Explore our Gauge Accessories section to find the perfect adapter for your needs and ensure a seamless installation experience.

Click Here For Range Of 3-Port Adapters

HIGH QUALITY SENSORS

Since 2016, JRP has been committed to providing accurate and reliable gauge products for the performance car market and both on-road and off-road diesel customers. We understand that when choosing a gauge, customers not only seek a product with an appealing design but also one that delivers dependable sensor performance. Our mission has always been to supply aesthetically pleasing products that focus on functionality and sensor quality, without requiring customers to pay premium prices. The Edge range of gauges are built with this philosophy in mind, offering robust and precise performance with the reassurance that you won't need to replace sensors or gauges due to inferior quality. Our temperature sensors utilize a 2-wire system, grounding through the same ground point used for the gauge, which provides a notable improvement in accuracy compared to single-wire sensors.

Outstanding LCD Display

A standout feature of the Edge 3in1 52mm digital oil pressure & water temp gauge is its impressive VA-type LCD panel, designed specifically for this range. From the moment they light up, it's evident that these displays are a cut above the typical LCD gauges on the market, boasting exceptional clarity and brightness. Developed over a year, these high-end VA panels provide superior viewing angles and brightness, ensuring that the JRP Edge gauges can be seen clearly from various angles. Many LCD displays suffer from diminished brightness and clarity when viewed off-centre, but the JRP Edge gauges offer some of the best off-angle visibility available today.

With a brightness rating of 600 nits, the display remains vivid and easy to read in nearly any lighting condition, including bright daylight. Additionally, the extensive range of selectable display colours allows for seamless integration with your vehicle's factory instrument cluster, maintaining a consistent interior aesthetic for those who value a unified cabin appearance.

Superior Build Quality

The Edge range of gauges is built to last with a robust design. Each gauge features a lightweight, yet durable alloy body finished in a polished black, providing a contemporary appearance suitable for a variety of applications. The front of the LCD screen is protected by a thick, single-piece, scratch-resistant tempered glass panel that slightly protrudes from the gauge, adding a touch of sophistication and quality. Unlike gauges with a cheap appearance, the Edge range exudes a modern look enhanced by premium materials and construction, ensuring it both looks and feels high-quality.

Simplified Power Installation

All Edge 52mm digital gauges include our Power Link feature and cable, enabling multiple gauges to be powered through a single link cable running from the primary gauge to any additional gauges. This system eliminates the need for multiple power looms for each gauge, reducing the need for extensive soldering or crimping. For each additional gauge, a simple power link cable can be connected from one gauge to the next, making the installation of three or four gauges quicker, easier, and cleaner.

Convenient Remote Control

While each gauge has a button on the body for adjusting settings—such as colour selection, warning thresholds, and peak value management—the Edge 52mm gauges also come with an external cabled controller. This remote button can be discreetly installed within the cabin, allowing for adjustments after installation without the need to remove the gauge from its housing. Simply connect the controller and install it somewhere accessible, whether tucked away or on your dash for a more integrated look. Updating warning settings, changing colours, and viewing or resetting peak values are now more convenient than ever.

Customizable Warnings & Peaks 

All Edge 52mm gauges offer user-configurable warning settings, which are essential for any high-quality gauge solution. These gauges feature a built-in buzzer to alert you when a set temperature threshold is exceeded, along with a visible warning symbol on the display. If your engine coolant temperature begins to rise, the CPW (Colour Pre-Warn) function provides a preliminary warning. Should the temperature continue to rise or spike too quickly, the gauge will emit a hard, audible alarm. Additionally, the gauges can record peak temperatures, allowing you to review the highest temperatures reached without constantly monitoring the gauge. Along with the low coolant alarm built into this gauge, and the low oil pressure warning alarm, this gauge has all three sensors covered with alarms.