NOVA has retrofitted over 3500 of their buses in the field with our sensors and has installed them OEM on their diesels. After a very successful evaluation of our sensors by NOVA Bus on the fleets at MTA New York and Chicago Transit Authority, we developed the VT220596, a new model specific to the NOVA installations with a smaller main bushing and a longer and more robust pigtail. More variations with Weather Pack plugs and other connectors were added as well. Later, a pigtail was added to the OEM plastic sensor with a Deutsch receptacle and the VT220594-D was born, our most popular model to date. This unit, our VT220594, is still used by some agencies today. The first M20 X 1.5 stainless steel sensors were fitted with a PKC receptacle to mimic the electrical connection on the plastic sensor. The next line of defense is the high limit temperature sensor and that delay in shutting down the engine may lead to further damage. This means the sensor may not alert the ECM that the surge tank is low on coolant. When components of the extended life coolant form a deposit on the teflon probe of the sensor, the sensor will indicate the presence of coolant when it is not there. These sensors have the opposite failure mode of the plastic sensor meaning they will have a false negative mode of failure instead of a positive mode. MARTA continues to install our sensors on all new bus deliveries from Gillig after removing the plastic sensors during Post Delivery Inspection (PDI).Īnother sensor part number we offer is our VT220594-FZ to replace the 3 or 4 wire capacitance style sensor being installed by many of the OEM Transit Bus Builders. Our first large scale campaign occurred at MARTA in Atlanta on 265 New Flyer CNG and 105 diesel buses. We first saw them and characterized them during the implementation of our 1/2 NPT stainless steel upper coolant level switch on NABI buses at New Jersey Transit. Our M20 X 1.5 stainless steel coolant level sensors were originally designed to replace the plastic OEM upper and lower sensors that began to be installed on transit bus engines in 2013. If you see an option below that best serves your transit agency, or if you need a completely custom solution, contact us online for prices and availability. We’ll work with you to create a custom design that keeps your buses on the road.īelow are some examples of the custom coolant sensor replacements VeriTranz designed-and continues to fabricate as needed. have over 1000 of our sensors installed at this point including SEPTA, Tri-Met, AC Transit and MARTA. With well over 35,000 units installed, this device has a less than 0.2 % failure rate, nearly 400 times better than the OEM device it replaces. ![]() Our sensors are currently installed in more than 200 transit agencies in the US and Canada. A special model, our VT220596, with a smaller main bushing and longer pigtail was developed for NOVA Bus, and they have installed about 4600 units to date. After a retrofit of the OEM plastic sensor with an epoxied harness plug and Deutsch 2-way pigtail, we released our VT220594-D, which is a "plug & play" replacement. The part number for this device is VT220594, and it will fit NABI, New Flyer, and Gillig. They are constructed of 304 stainless steel as well, so it will not breakdown due to thermal cycling. ![]() ![]() addressed both of these concerns with our own coolant level sensors’ improved design. Our floats move in a single plane, making false coding nearly impossible. The OEM sensor may also leak coolant from the electrical terminals at the receptacle due to a large difference in coefficients of thermal expansion between plastic sensor and the stainless-steel surge tank. An unreliable float design can allow the float to hang upside down, indicating a critically low coolant level on a surge tank that is full. The OEM coolant level sensors addressed in 2015 had two main modes of failure: false error coding and coolant leakage. How Our Coolant Level Sensors Solved the Problem If your buses are experiencing similar issues, let us know and we will be happy to assist you with a solution. Our VeriTranz engineers designed and developed custom coolant level sensor replacements and we have shipped over 35,000 of them to more than 210 transit agencies across North America to solve the problem. ![]() In the Spring of 2015, VeriTranz was alerted to problems with an OEM plastic lower coolant level sensor found on many NABI, New Flyer, NOVA, and Gillig transit buses that were specified by Cummins in 2013 as a result of the 2013 EPA diesel emissions standards.
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