Schelt Technology

HD51.3D… is a series of high performance two-axis static ultrasonic anemometers for accurate measurements in all environmental conditions.

Available in different combinations for the measurement of:

• Wind speed (up to 85 m/s)
• Wind direction
• Cartesian U-V components of wind speed
• Wind Gust
• relative humidity and temperature (optional)
• global solar radiation (optional)
• atmospheric pressure (optional).

Please note that this product has been discontinued.

Kindly refer to:

• PBS83M… series for barometric transmitters with digital output
• PBS860… and PBS880… for barometric transmitters with analog output.

The radiometer LPUVI02 measures the global effective irradiance on a flat surface (Watt /m² effective), according to the requirements of the WMO for the measurement of UV-index.

The global irradiance is the sum of direct sun and of diffuse irradiance. In the ultraviolet spectral region, unlike what occurs in the portion of the visible light where the direct component is prevalent on the diffuse component, the light is strongly scattered in the atmosphere, and then the two components are equal; it is therefore of primary importance that the radiometer is able to accurately measure both components.

The radiometer LPUVI02 is produced with voltage output:

• LPUVI02AV –  0…1 Vdc, 0…5 Vdc or 0…10 Vdc output  (0…16 UV index) to be defined when ordering.
• LPUVI02.1AV – 0…1V dc, 0…5 Vdc or 0…10 Vdc output (0…20 UV index) to be defined when ordering.

The versions 02.1 have a full scale that reach 20 UV-index and are suitable for the measurement of UV in equatorial areas and high mountain: in these places in fact  index value UV of 11 can be exceeded for a significant time.
The power supplied is required at 8-30 Vdc, except for the version LPUVI02AV10 (voltage output 0-10 V) which is of 15-30 Vdc.

The instrument is managed to operate for long periods without maintenance (except cleaning of the dome and checking the status of silica gel) provided that it is properly powered.

This feature makes the device ideal for use in remote weather stations also.

Radiometric probe for outdoor use for measuring IRRADIANCE in the UVA spectral range (315…400 nm).  Supplied with Calibration Report. On request CPM12AA4… cables with 4-pole M12 connector.

The LPUVA02 radiometer measures the broadband UVA irradiance on a plane surface (Watt/ m²). Measured irradiance is the result of the sum of direct solar
irradiance and of diffuse irradiance. TIt can measure as well the UVA irradiance in closed room.

The radiometer is produced in three versions:

• LPUVA02 – passive – μV per μW/cm² output;
• LPUVA02AC – active, 4…20 mA current output (0…150 W/m²), integrated transmitter amplifier.
• LPUVA02AV – active, 0…1Vdc, 0…5Vdc or 0…10Vdc output (0…150 W/m²) to be defined when ordering, integrated transmitter amplifier.

HD32MT.1 data logger integrated in an AISI 304 stainless steel outdoor housing. Screen to protect the housing from solar radiation. Powder-coated white.

Double locking, one is a key. Dimensions 450 x 300 x 210 mm. IP66 protection degree.

Supplied with accessories for attachment to the pole diameter 36…52 mm. Provided for 100…240 Vac mains power supply or for power supply from solar panel (version HD32.35FP). Wired and tested.

Optionally, LCD viewer simple (HD32.3D) or with GPS module for automatical time synchronization of the data logger (HD32.D.GPS)

PMsense is a PM1.0, PM2.5 and PM10 Particulate Matter transmitter with RS485 Modbus-RTU output, suitable for outdoor air quality monitoring.

The dust particles concentration is measured using the laser scattering principle.

The transmitter is maintenance-free and has fast response, high sensitivity and an excellent stability.

The PM sensor can be operated in two ways:

• Continuous operating mode: the sensor is always active and measurements are continuously taken. In this mode at least 10,000 hours of PM sensor life are guaranteed.
• Discontinuous operating mode (default): the sensor is activated at regular intervals, when measurements has to be taken. This mode increases the PM sensor life.

On request, an optional CO2 sensor can be integrated in the trasmitter.

The transmitter can be supplied with up to 2 optional configurable 4…20 mA, 0…5 V or 0…10 V analog outputs.

More background information on why to measure Particulate Matter (PM) can be found here.

The HD50CR is the ideal solution for monitoring of differential pressure, temperature and humidity in Clean Room applications.

A low pressure sensor with high accuracy and stability and auto-zeroing feature ensure high accuracy and stability over the time.

Three 0…5/10 V and 0/4…20 mA analog outputs and a digital RS485 output with “Slave” Modbus-RTU protocol allow connecting the instrument to a network of sensors are available. The instrument can also be connected to a local network via the Ethernet interface (optionally Wi-Fi, on request). The simultaneous operation of two communication protocols (proprietary and Modbus TCP/IP) is possible. The instrument manages up to 10 “TCP/IP Client” simultaneously. If the local network is connected to Internet, the data can be regularly sent to an FTP address, to the Cloud and via e-mail.

The instrument is also available in a version with only the 3 analogue outputs and the RS485 digital output, with decimal resolution. Click here for the HD50CR-AS dedicated manual.

Configuring the instrument is very simple: if both connected to the same network, this can be done through any device that has been granted access to the instruments webserver.

For each detected quantity, two alarm thresholds can be set by the user. Exceeding a threshold is signaled by direct alarms.

For specific FDA regulations that can apply in the Pharmaceutical industry, we can provide optional modules to our standard HD35AP-S and HDServer1 software to fully operate conform 21 CFR part 11 regulations.

The HD50CR provides the ideal solution for the application, keeping track of any out of range values and providing the perfect evidence for any quality audit. The stainless steel flush-mounted style guarantees that the instrument is easy to clean.

The probes HD3910.1 (two electrodes) and HD3910.2 (three electrodes) measure the soil volumetric water content (VWC) by using a capacitive measurement principle which allows fast measurements in the field and with minimal invasiveness.

The three electrode probe HD3910.2 is particularly suitable for the measurement in small volumes, for example for cultivations in pots.

The probes give a direct reading in Volumetric Water Content (VWC) from 0-60%.

Versions available:

• RS485 digital output with MODBUS-RTU protocol: allows the use of even very long connection cables. It can be connected to the data loggers HD32MT.1 and HD32MT.3 or to any other data logger with RS485 MODBUS-RTU input.
• SDI-12 digital output is compatible with version 1.3 of the protocol and can be connected to the data logger HD32MT.3 or to any other data logger with SDI-12 input.
• Analog output has two 0.5…3 V standard voltage outputs: one for the volumetric water content and one for the temperature. On request, 0…2.5 V, 0…5 V or 0…10 V outputs.

The probes are equipped with a fixed cable, 5 or 10 m standard length, with open wires at the end.

The transmitters allow converting the photometric quantity “equivalent veiling luminance” – HD2021T7 – or a photometric quantity Luminance (cd/m2) – HD2021T6 – into a current (4…20 mA) or a voltage (0…10 V) signal according to the version chosen. If the acquisition station is far from the probe (>50m), it is necessary to use the current output version.The probe is used for the control of street lighting, in particular, the measurement of equivalent veiling luminance is essential to determine the threshold luminance at the entrance of the tunnels (UNI 11095:2011).

HD2021T7 is used for the control of street lighting, in particular, the measurement of equivalent veiling luminance is essential to determine the threshold luminance at the entrance of the tunnels (UNI 11095:2011).  The transmitter full scale can be chosen (when ordering) between two different values:  2000 cd/m2 or 20000 cd/m2

HD2021T6 is used for road lighting control. In particular, the measurement of luminance at a 20° angle (L20) is necessary to estimate threshold luminance at tunnel entrances (CIE standard 88:2004. This standard foresees the measurement of debilitating luminance in future). Moreover, the probe can be used for calculating vertical illuminance (Ev) as prescribed in the above-mentioned standard. At the order time, it is possible to choose the transmitter sensitivity among three previously set values: 2 kcd/m², 20 kcd/m² or 200 kcd/m².  Finally, the probe can be used for any application where the measurement of luminance is required, for example projector screens, diaphanoscopes etc.

The probe LPPHOT03 measures illuminance (lux), defined as the ratio between the luminous flux (lumen) passing through a surface and the surface area (m²). The spectral response curve of a photometric probe is similar to the human eye curve, known as standard photopic curve V(λ). The difference in spectral response between LPPHOT03 and the standard photopic curve V(λ) is calculated by means of the error f’1.

Calibration is carried out by comparison with a reference luxmeter, calibrated by a Primary Metrological Laboratory. The Calibration Procedure complies with the CEI publication No.69 “Methods of characterizing illuminance meters and luminance meters: Performance characteristics and specifications, 1987”.

The photometric measurement probe is designed for outdoor readings. CIE photopic filter.

Output, according to the chosen configuration, in mV or 4…20 mA or 0…10 Vdc normalized output or RS485 MODBUS-RTU output.

• LPPHOT03 = mV / klux
• LPPHOT03BL = mV / klux output + base with levelling device
• LPPHOT03BLAC = output 4…20 mA + base with levelling device
• LPPHOT03BLAV = output 0…10 V + base with levelling device
• LPPHOT03BLS = RS485 MODBUS-RTU output + base with levelling device

Working temperature -20…+60 °C.  M12 male 4-pole (models with analog output) or 8-pole (model with RS485 MODBUS-RTU output) connector.

On request CPM12AA4… (except LPPHOT03BLS) or CPM12-8D (only LPPHOT03BLS) cable with M12 female connector.

HD32MT.1 data logger integrated in a fiberglass-reinforced hot-pressed polyester outdoor housing. Screen to protect the housing from solar radiation, powder-coated anodized aluminum. White.

Key lock. Dimensions 415 x 310 x 170 mm. IP66 protection degree.

Supplied with accessories for attachment to the stainless steel pole diameter 36…52 mm. Provided for 100…240 Vac mains power supply or for power supply from solar panel (version HD32.36FP). Wired and tested.

Optionally, LCD viewer simple (HD32.3D) or with GPS module for automatical time synchronization of the data logger (HD32.D.GPS)

HD53GSM is a wireless quad-band GSM/GPRS modem. The module is controlled via standard RS232 serial interface and AT commands.

It features:

• SIM card slot,
• SMA antenna connector,
• power line connector with remote on/off line,
• two status LED: the POWER LED is switched on when the GSM is powered, the NET LED indicates the connection status to the GSM net,
• RS232 Sub-D 9-pin connector.

Stainless steel Pitot tubes to measure air speed and temperature, for models provided with ‘K’ thermocouple, equipped with silicon tube with 6 mm external diam., 4 mm internal diam. and length 2 m.

PW cable has to be ordered separately.

Types available:

T1-300 – lenght 300 mm

T2-400 – lenght 400 mm

T3-800 – lenght 800 mm

T3-800TC -lenght 800 mm – K thermocouple

For other lengths please, contact us.

The VUP12 ventilation and heating unit allows increasing the accuracy of solar radiation measurements maintaining the operating temperature of the sensor uniform. Ventilation reduces the type “A” offset (present in pyranometers and pyrgeometers) due to cooling of the dome with respect to the sensor body.

It can be used outdoor in any weather condition and avoids the formation of dew and frost on the optical part of the sensor.

The use of ventilation and moderate heating prevents dew formation on the dome, especially in the early morning hours, allowing much more accurate measurements even in moderate climates. The heating function can also be used in extreme environmental conditions, to avoid the formation of snow and ice on the sensor dome.
The unit is equipped with two independent heating circuits of equal power, which can be individually activated to better adapt the heating function to the climate of the installation site.

The unit is suitable for LPS02… and LPS10… series pyranometers and allows solar radiation measurements to be performed according to the recommendations of the following standards:

• IEC 61724-1
• ISO/TR 990
• “BSRN operations manual”

Outdoor photometric probe for measuring ILLUMINANCE (0…150 Klux), CIE photopic filter, diffuser for cosine correction. mVdc output for klux. Complete with Calibration Report. On request 5 or 10m cables with connectors.

LPPHOT02… probe measures illuminance (lux), defined as the ratio between the luminous flux (lumen) passing through a surface and the surface area (m²).
The spectral response curve of a photometric probe is similar to the human eye curve, known as standard photopic curve V(λ). The difference in spectral response between LPPHOT02 and the standard photopic curve V(λ) is calculated by means of the error f1′.

LPPHOT02 is designed and constructed for outdoor installation for long periods. The photometric measurement for external use is used for the measurement of daylight in climatological and meteorological applications.

The luxmeter is produced in three versions:

• LPPHOT02 – passive (mVdc output for klux);
• LPPHOT02AC – active (4…20 mA output, integrated transmitter amplifier);
• LPPHOT02AV – active (0…1Vdc, 0…5Vdc or 0…10Vdc output to be defined when ordering, integrated transmitter amplifier)

LPNET14 is a 4-component net-radiometer for the measurement of the net radiation between 0.3 μm and 45 μm.

The net-radiometer consists of two pyranometers (one for the measurement of the global radiation Esw↓ and the other one for the measurement of the reflected solar radiation Esw↑ ) and a pair of pyrgeometers (one for the measurement of the infrared radiation emitted by the sky EFIR↓ and the other one for the infrared emitted by the ground surface EFIR↑).

The LPNET14 is equipped with a temperature sensor (NTC). The measurement of the temperature is needed for the measurement with the two pyrgeometers, in fact, the far infrared is derived by measuring the thermopile output and by the knowledge of the instrument’s temperature.

The net radiometer is suitable for outdoor use in all weather conditions and requires little maintenance.

The heating and ventilation unit is meant to be used with solar radiation sensors (pyranometer, pyrgeometer and radiometer) and can be used outdoor under any weather conditions.

The ventilation of the instruments increases the precision of the measures by making the pyranometer’s temperature uniform, in particular it avoids the deposit of dew and frost on the optical parts of the sensors and reduces the off-set of type A (present in pyranometers and pyrgeometers) caused by the cooling of the dome with respect to the instrument’s body.

The HD9906.51 unit can be used with LPPYRA02 and LPPYRA10, with the pyrgeometer LPPIRG01 and the radiometers LPPHOT02, LPUVA02 and LPUVB02.