ENGINE GUARD Dual Temperature Sensor Kit

out of 5

$129.00 inc. GST


  • 1 x Digital Display Unit
  • 2 x Bolt-on Temperature Sensors with 5m cable
  • Wiring loom, water resistant connectors
  • Owner’s Manual
  • The kit is supplied in a transparent retail package with hanger hole at the top, barcoded.

FREE SHIPPING when you order 2 or more systems!

Product Description

Dual Temperature Sensor System

This system gives you the ability to monitor 2 different locations at the same time. For example, you could monitor:

  • engine cylinder head & oil temperature. This is easy- just slide a large stainless hose clamp over the oil filter, slide the sensor under the edge and tighten! No need to tap into oil galleries, etc.
  • engine and auto transmission
  • both cylinder heads on a V8, flat 4 or 6.
  • coolant temperature in and out of radiator on modified vehicles to test if the radiator is satisfactory
  • dual engine set ups such as boats or planes (yes, we have systems being used on planes..)

The Display shows temperature on sensor 1 as the default, but the operator can change between 1 and 2 at any time. In addition, if either sensor reaches the alarm set point and the alarm is triggered, the Display shows WHICH sensor and also the actual temp reading in real time. In addition, on start-up the Display shows both set-points individually.

How does ENGINE GUARD work?  

The ENGINE GUARD system is an advanced digital temperature gauge with a user-adjustable audible alarm. Designed to warn you of overheating, the system will also provide very accurate real time monitoring of changes in temperature. Many owners report that they are surprised to see significant variations in engine temperature- whereas the factory temperature gauge hardly moves. This is because most factory temperature gauges only show LARGE temperature changes- typically in three stages being ‘COLD – OK – OVERHEATING’. But actual engine temperatures can change between 90°c and 110°c and the needle may not move! This is designed to give you ‘peace of mind’. Unfortunately, it can also go from “OK” to “OVERHEATING” in seconds- causing expensive engine damage. ENGINE GUARD will warn you before the damage is done!

With ENGINE GUARD you can monitor small changes in temperature- and take action. And the changes are detected very, very quickly. For example, on most vehicles an ENGINE GUARD will react to starting from cold in under 40 seconds. By contrast, most factory gauges take many minutes! And the ENGINE GUARD is remarkably good at detecting temperature changes due to load. As an example, we recently completed a test: a Toyota Prado was used to see the impact of tyre pressures on engine temperature. The test revealed that at 100kmh and 30psi tyre pressure the display showed 116°c but at the same speed and 40psi, the temperature drops to 112°c. So you can adjust your driving style using the accurate feedback- (for example, change to a lower gear or slow down) if you see a gradual rise in temperature- particularly if towing.

Importantly the system uses a temperature sensor located directly on the metal of the engine– usually located on the cylinder head, on or near the thermostat housing. The sensor is installed like a washer under a bolt- quick and easy! And cylinder head temperature is a very accurate predictor of overheating- after all, this is where the combustion takes place. In testing, we have reliably demonstrated that if an engine has a sudden loss of coolant, head temperature will start to rise within 20 seconds. As the alarm set point is usually set around 2 – 5 degrees above the normal highest operating temperature, it will give a very accurate and timely warning. Equally, unlike traditional ‘immersed in coolant’ type temperature senders (as per most manufacturers) if you suffer a sudden catastrophic coolant loss, the ENGINE GUARD will still function perfectly. By contrast most factory gauges will DROP in temperature if there is no coolant- effectively telling you the wrong thing! The ENGINE GUARD will also show accurate temperature if the coolant is not circulating (such as a stuck thermostat or failed water pump) whereas immersed senders would fail to show any change.

The digital Display is designed to be simple to install and easy to operate. The Display mounts almost ‘flush’ on the dashboard (only 19mm thick) and can be located anywhere that suits the driver or operator. It also uses a high bond self-adhesive backing so no need to drill or cut into the dash. Operating the Display is simple- the system records the highest temperature in the memory making setting a breeze, and this alarm set point is displayed on start-up. It also features multiple error warnings if faults exist. There are also 11 adjustable parameters to allow you to customize the system to suit your exact purposes- from display brightness to alarm delay and reset times.

So don’t delay- ENGINE GUARD today!

This model is excellent value- giving effectively twice the monitoring for not much more!

Includes 1 x Display Unit, 2 x Sensors, wiring loom, plugs and full installation instructions. The system is supplied in a transparent retail package with hanger hole at the top.

Additional information

Weight 0.23 kg
Dimensions 18.5 × 17 × 4.5 cm

5 reviews for ENGINE GUARD Dual Temperature Sensor Kit

  1. David NORMAN

    Installed a duel sensor unit on my yacht in June 2018. One sensor on the engine block the other on the exhaust. The temperature changes are immediate and easily monitored to indicate any sudden change after running temperatures are reached. The alarms are set 5 degrees above maximum temps reached over time. This device takes the guess work out of critical engine temps resulting in less anxiety while motoring. I would recommend that every sailing vessel and motor launch should have one of these devices for peace of mind and trouble free motoring.

    • Phil Welch

      Thanks David- awesome feedback and much appreciated!

  2. Jason

    What a product – easy to install, easy to program, easy to adjust. Every boat should have one of these on their engine – buy the two sensors as you’ll want to check multiple temperatures once you see how easy it is to use! I love this product!

  3. Brian G (verified owner)

    I have a Honda 90 outboard, purchased not knowing the condition of the engine. It started, compression OK. The temp and oil pressure gauges didn’t work and replacement was very expensive. I purchased Engine Guard only last week,at a quarter the price, when connected oil temp was a little high (fitted to filter with clamp) and cylinder head temp through the roof, found thermostat rotted and jammed and pump burned out. The most important thing is a temp gauge would not have indicated no flow until it was to late and the standard warning buzzer I call the “to late buzzer”. Thanks Engine Guard small investments compared to a replacement Honda 90 4 stroke

  4. Tracy

    Best easiest deal ever done ordered 5 . Easy to find immediate answer on the phone. Love it, thank you

  5. Ian Neal

    Great device , every vehicle / truck should have one .

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