Levno uses two sensors to measure temperature.
- The Inlet Temperature sensor is attached to the milk line after the plate cooler and before the vat.
- The Vat temperature sensor is inserted into the temperature pocket (normally located on the front of the vat). This pocket also holds the sensor responsible for your chiller.
Levno’s temperature sensors are calibrated to +/- 0.5°C of whatever the sensor is in contact with. During installation, the Levno technician will insulate the inlet sensor in a special tape to ensure it gets the best contact and best readings possible. The temperature pocket is filled with dairy-grade glycol to give a more accurate reading.
The Levno transceiver receives data from these sensors every 5 seconds, allowing the transceiver to measure the highest temperature possible.
Why wash temperatures are warmer than what Levno is displaying?
Due to food safety regulations, neither sensor is in contact with your milk or the hot wash water. Levno relies on heat transfer from the wash water to the steel the sensor is in contact with (milk line, temperature pocket) to detect a wash.
Based on extensive testing temperatures inside the vat are 10 to 15 degrees warmer than what Levno measures.
Our wash temperature is still reading too low.
The main cause of lower-than-expected wash temperatures is a short duration of a wash. When a wash is too short this does not allow the steel of the vat to get up to a hot enough temperature to kill the bacteria.
The Levno sensor is in contact with the steel of the vat and if the steel does not heat up enough the reading will be lower than the temperature of the wash water.
If a temperature of at least 45°C is measured by the temperature sensor, a wash will be detected by Levno and the peak temperature during the wash will be displayed on the website/app.
The risk level of the “Milk Quality Indicator” can change if a wash does not reach at least 45°C