Alphacool ES Flow and Temperature Indicator HighFlow with RPM-Signal, Acetal, Black (17558)

The Alphacool ES Flow and Temperature Indicator HighFlow with RPM-Signal is an inline sensor for water flow and water temperature with two G1/4 internal threads. It is very compact at 58 x 25 x 25 mm and can be integrated into any water circuit, whether the system is equipped with soft tube or HardTubes. Alphacool also calls the RPM signal a tacho signal.

Properties

• Threads: 2x G1/4 internal thread (for max. 5 mm thread length)
• Temperature sensor: NTC 10 kOhm thermistor, -40 to 125 °C
• Flow sensor: Hall sensor with RPM signal
• Size (L x W x H): 58 x 25 x 25 mm
• Material: Acetal
• Color: Black

Integration made easy

It does not matter where the sensor sits: simply screw the appropriate connections to it, then mount it at any position in the loop. Thanks to the two threads it takes any G1/4 part, as long as the thread is no longer than 5 mm. The manual adds that the sensor is directional. The inlet is marked with a symbol, and inlet and outlet are to be tightened securely.

Temperature sensor

The sensor used here is a classic NTC 10 kOhm thermistor. Its readable range is between -40 and 125 °C, and the manual gives the resistance over that range as 0.530 k Ohm to 194.3 k Ohm. The temperature sensor cable is 430 mm long and terminates in a typical 2-pin connector. Many mainboards now offer direct connection options for such sensors, so please check the manual of your mainboard. Of course there are also various external controllers that offer a connection for it (a controller with NTC connection).

Flow sensor

The flow sensor enables continuous measurement of the water flow within the loop and reports it as an RPM signal. Its 42cm sensor cable and the corresponding connectors are included in the scope of delivery. Note that the RPM figure becomes a flow figure only with Alphacool's measurement values for the water flow (L/h per RPM). The manual, a PDF file available for download under the following link at the end of this page, has a section on the speed and flow rate test (flow-measurement).

What the loop needs

Two fittings for your tube size, one in each thread. A corresponding readout device is not included in the scope of delivery: the manual asks for a compatible reader with an NTC connection to read and display the temperature.

Technical data

• Dimensions (L x W x H): 58 x 25 x 25 mm
• Material: Acetal
• Weight: 45 g
• Pressure tested: 2 bar
• Max working temperature: 60 °C
• Threads: 2x G1/4 internal thread (for max. 5 mm thread length)
• Cable length hall sensor: 420 mm
• Cable length temperature sensor: 430 mm
• Color: black

Notes

• Use only clear, transparent water cooling fluids. Alphacool warns that the particles and additives in pastel liquids can clog and permanently damage radiators, pumps, coolers and hoses, which can void the manufacturer's warranty.

In the box

• 1x ES flow and temperature indicator