FLS hay 2m lance, divisible 8-30% humidity -20°C to +120°C
Robust humidity and temperature hay probe with 2 meter length, divisible / robust 2 meter insertion lance / long-term stable sensors / measurement result within seconds / automatic average calculation / lifetime support
Humimeter FLS Rugged Humidity and Temperature Hay Sock Probe
We offer the robust Humimeter FLS hay probe, which is 2 meters long and can be divided for cost-effective shipping. If the hay brought in is too moist, fungal and bacterial growth can occur during storage. These processes release energy in the form of heat, which leads to a rise in temperature in the haystack. In extreme cases, this can even lead to spontaneous combustion of the hay. Hay
It is the duty of the hayloft operator to regularly and strictly monitor the stored hay, as required by the Fire Police Regulations. Failure to comply with this duty may, in the event of an emergency, be considered negligent arson and result in the loss of insurance coverage.
The water content of the hay can be measured with the hay probe even before it is placed in the hayloft, e.g. on the loader wagon or during drying. A water content of less than 14% is considered safe, so that a decision can be made before storage as to whether the hay still needs to be re-dried or whether the water content is low enough for safe storage.
The Humimeter FLS hay probe enables easy control of the moisture content and temperature even in deep layers of the haystack. Through regular and thorough checks, developing hot spots or moisture pockets can be detected and treated at an early stage.
The robust Humimeter FLS hay stick probe is an indispensable tool for hay stick operators. It is 2 meters long and can be split for cost-effective shipping.
But why is this so important? Because if the stored hay is too damp, it can lead to fungal and bacterial growth. These processes generate heat and increase the temperature in the haystack.
Then, in extreme cases, the hay may even spontaneously combust. It is therefore crucial to monitor the moisture and temperature content regularly. Hay
Although it is prescribed in the fire regulations, some operators neglect this duty. This can have serious consequences, including the loss of insurance cover in the event of an emergency.
According to the motto "better safe than sorry", the water content of the hay can be measured before storage, for example on the loading wagon or during drying.
In addition, a water content of less than 14% is considered safe for storage. With the Humimeter FLS hay stick probe, you can easily check the moisture content and temperature in deep layers of the haystack.
As a result, potential hot spots or moisture pockets can be detected and treated at an early stage to ensure safety.
FLS with extension:
Sent separately for shipping. During initial assembly, plug the extension together (electronics) and screw it on. FLS should be stored screwed together after initial assembly. FLS is not suitable for multiple disassembly of the extension. FLS with 2 m rod is only suitable for loose hay and not for straw bales! Risk of breakage.
Note on repairing or ordering replacement probes
For repairs or ordering replacement probes, it is essential that the complete set (FLS device including extension lance and electrical connection) is sent to us. This is the only way we can ensure that the entire system functions correctly and is matched to the calibrated measuring rod.
Application area
Activate the hay probe of the Humimeter FLS by pressing the ON button for 3 seconds. After a short time the probe is ready for use. The hay probe is factory calibrated so that the moisture content is shown directly on the illuminated display without the need for conversion or lookup in tables.
Insert the 2-meter lance into the haystack to measure moisture content and temperature. By taking targeted measurements at different depths, you can detect moisture pockets and regions of elevated temperature. The measurement is taken in the area around the tip of the probe.
You can measure at many different locations in a short time or leave the probe at one location to continuously monitor the drying and temperature progress of a critical region. Fulfill your duty to regularly monitor the hay easily and reliably. Documentation of the measured values can be easily carried out on the device. Each measured value can be stored on the Humimeter FLS at the touch of a button.
With the optional USB interface, the stored values can be transferred to a PC or printed out on a portable measured value printer.
Performance features
| Measuring range | 8 to 30 % water content |
|---|---|
| Resolution | 0,1 % |
| Calibration accuracy to reference material | +/- 0,8 % |
| Temperature measuring range | -20 to +120 °C (measuring tip only) |
| Power supply | 4 x 1.5 volt AA alkaline batteries |
| Current consumption | 60 mA (with display illumination) |
| Dimensions | 2280 x 75 x 45 mm (without handle bar) |
| Weight | 1200 g (with batteries) |
| Menu languages | German, English, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, International |
Your advantages
- Very simple operation of the hay probe
- Humidity and temperature measurement
- Automatic temperature compensation
- A powerful handheld moisture meter series with innovative sensor technology
- Menu language in German, English, French, Italian, Spanish, Portuguese, Czech, Polish, International, Russian
For more information, please click on the red boxes.

Comparison table
| Art.no. | Image | Extension, accessories |
|---|---|---|
| 14433 |
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Thermal printerThermal printer with battery - Mobile serial printer for Humimeter devices with USB interface
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| 12308 |
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Test blockTest block for Humimeter FL1, FL2, FLH, BLL, BL2, WLW, BLW, SLW, RM1 and BLO - Dimensions: 55 x 55 x 45 mm, Weight: 96 g
|
| 12278 |
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Humimeter USB Data Interface ModuleHumimeter USB data interface module with LogMemorizer measurement data acquisition and evaluation software on USB stick including USB cable for PC
(Attention: retrofitting option only possible in the factory)
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Extension lance and electrical connection

Note on repairing or ordering replacement probes
For repairs or ordering replacement probes, it is essential that the complete set (FLS device including extension lance and electrical connection) is sent to us. This is the only way we can ensure that the entire system functions correctly and is matched to the calibrated measuring rod.
Diameter of the probes of FL1, FL2: 10 mm
Diameter of the FLS probe: first section (1 meter): 10 mm, second section: 15 mm
There are extensive practical tests for all FL devices, but unfortunately we have no information or records on the maximum load.
To avoid damage, it is important to pull the piercing lance straight out of the bale again after piercing.
| Properties | humimeter FLS | humimeter FLSO | humimeter FL2 |
| Product type | Humidity and temperature sensor | Online humidity transmitter | Hay and straw moisture meter |
| Lengths of the lance | 2 meters | 2 meters | 0.6 meter (permanently mounted) |
| Measuring range humidity | 8 to 30 % water content | 10 to 40 % water content | 8 to 60 % water content (depending on variety) |
| Resolution | 0,1 % | 0,1 % | 0,1 % |
| Calibration accuracy | +/- 0,8 % | N/A | +/- 0,8 % |
| Temperature measuring range | -20 to +120 °C | +5 to +85 °C | -20 to +120 °C (measuring tip only) |
| Temperature (measuring tip) | N/A | -10 to +70 °C | N/A |
| Temperature compensation | N/A | automatic | automatic |
| Power supply | 4 x 1.5 volt AA alkaline batteries | 24VDC (15 to 29VDC) | 4 x 1.5 volt AA alkaline batteries |
| Current consumption | 60 mA (with display illumination) | 90 mA (without output or display) | N/A |
| Analog outputs | N/A | 4-20mA for water content | N/A |
| Scaling (humidity) | N/A | 0 to 40 % | N/A |
| Scaling (temperature) | N/A | +5 to +85 °C | N/A |
| Dimensions | 854 x 692 x 282 mm, 2280 x 75 x 45 mm (without handle bar) | 740 x 65 x 40 mm | 740 x 65 x 40 mm |
| Weight | 1200 g (with batteries) | 450 g | 450 g (incl. batteries) |
| Menu languages | German, English, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, International | German, English, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, International | German, English, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, International |
| Scope of delivery | humimeter FLS with rubber protection, handle bar and batteries | N/A | humimeter FL2, rubber protection, wooden cassette and batteries, compactor plate for loose material |




