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Net Pyrradiometer
for net radiation measurement
MF-11
Pyrradiometer
 for measurement of upward or downward radiation flux
MF-11A
Arm Net Pyrradiometer
for measurement of net radiation on declined or vertical surface
MF-40
Polyethyene domes protect sensor from dust and window
Artificial ventilation system eliminates the effect of wind and frost and homogenizes the dometemperature

Free maintenance due to use of electronic dryer which prevents the dome inside from dewing

Compact design enables easy installation
By attaching an adaptor either upward or downward radiation can be measured independently.
Net Pyrradiometer
for net radiation measurement
MF-11
MF-11
Net Pyrradiometer MF-11


EKO Net Pyrradiometer Model MF-11 measures directly diurnal radiation of balance including short and long wave components. Generally, the measurement of net radiation has been performed only; in meteorology, but nowadays it is applied to following fields also:

Agriculture Prediction of minimum temperature and frost damage, estimate of heat loss from greenhouse and evaporation from crop fields and ground surfaces

Pollution
Estimateofatmosphericstabilityandclouddensity

Civilengineering
Pred;ctionofroadfreezing,estimateofevaporationfrom damsandheatbalancesofbuildingsurfaces

The EKO Net pyrradiometer MF-11 is a newly developed model having advanced characteristics of both wind-through type and wind-protectiontype, each of which has been used widely in this field.

The fan is the most important part in this instrument. It has three purposes:
1) to send the constant air current over the dome outside,
2) to supply the dry air in the dome inside and
3) to increase the efficiency of the electronic dryer. Dried air sent to the domes inside keeps the shape of the dome hemispherical during measurement, and at the same time prevents the domes from freezing. The sensing part consists of 250 series thermopiles made of copper and constantan.

Pyrradiometer
for measurement of upward or downward radiation flux
MF-11A
MF-11A

By covering lower or upper side of the sensor with an adaptor, the MF-11 can also be used as Pyrradiometer, which measures upward or downward radiation flux. Long wave radiation during the night has a close relation with freezing, mist, frost, minimum temperature, etc.
Thesensing part is the same as that of the MF-11. The adaptor covers the lower or upper side sensor of the MF-11. The black body radiation energy emitted from the inside wall of the adaptor is determined by measuring the wall surface temperature ''T" with the built-in platinum resistance. Therefore, the incoming radiation ''R'' is expressed
as: R = kE + αT4
where kE is the heat f1ux-passing through the sensing part of the Pyrradiometer. By adding a special convertor for the Pyrradiometer the actual incoming radiation can directly be recorded.
Arm Net Pyrradiometer
for measurement of net radiation on declined or vertical surface
MF-40
Arm Net Pyrradiometer MF-40
without artificial ventilation system


This instrument is useful for not only on horizontal plane installation, but also on declined or vertical surface installation. It is most suitable for measuring netradiation on wall surfaces and/or canopies of the field.
The instrument is of arm type net pyrradiometer which is specially designed for measuring net radiation in every direction through on declined or vertical surfaces.

Specificastions MF-11, MF-11A MF-40
Sensitivity Abt. 24 mV/kW.m-2 or more (without shunt box)
Impedance Abt. 80 Ω
Response time 12sec. (1/e signal)
Temperature range to be used -15°C to +40°C
Accuracy ±5%
Weight Abt. 7kg abt. 8kg
Wavelength region 0.3 to 30µm or more
Selection of sensitivity 1) Day time measurement 7mV/kW.m-2 with shunt box
2) Night time measurement 25mV/kW.m-2 with shunt box

Standard Accessories MF-11, MF-11A, MF-40
1 pc. 10m outpu tcable with connector 1 pc. Blush
1 pc. 10m poewr supply cable 1 pc. Cleaning pin
2 pcs. Basic unit fixing bolt 1 pc. White grease
10 pcs. Polyethylene hemisphere (spare) 1 pc. Operation manual
1 pc. Ring spanner 1 pc. Calibration certificate
2 pcs. Shield packing    

 

 


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