Hydrology Archives -

Wideband Panspectral Net Radiation Sensor (KDS-512)

The KDS-512 from Komoline Aerospace is an advanced sensor designed for simultaneous measurement of wideband panspectral downward and upward radiation components. It accurately computes net radiation and offers analog and digital connectivity options for easy integration with data loggers. Utilizing thermopile-based technology and self-calibrating electronics, it ensures high accuracy and long-term stability.

Parameter	Conditions	Min	Type	Max	Units
Incident Radiation (Either Direction)
Type of Sensor	Thermopile
Measurement Method	Four-quadrant non-contact Hall-effect encoder
Measurement Range		0		3000	Wm^-2
Spectral Sensitivity Range	50% points	300		60000	nm
Field of View		180°
Accuracy			2	4	%FS
Resolution			1		Wm^-2
Response Time Constant				20	s
Parametric Sampling Rate			1		Hz
Auxiliary Measurement – Energy Totalization
Totalization Time Resolution			1		Hz
Totalization Range		0		10000	MJm^-2
Totalization Reset		Host Initiated
Accuracy	Total Energy Terms		5		%
Resolution			0.01		MJm^-2
Output
Settling Time on Power-On				60	s
Latency on Power-On			1		s
Update Rate			1		Hz
Averaging Aperture	User/Factory Settable	1		600	s
Physical
Mass			1		kg
Size		150 x 150 x 150 (approx)	.mm
Materials		Engineering Plastics, Anodized aluminum
Deployment
Location		Outdoor
Operating Temperature Range		-40		+85	°C
External Interfaces
The sensor is available in ten standard output configurations as detailed below

Output Option	Interface	Leve	Baud Rate	Protocols	Max Cable Length	Power Supply
3V Digital (D00)	UART	3V Digital	9600-115.2k	KomBus/Modbus	5 to 10m	4-28V (<1mA
RS485 (D01)	UART	RS485	9600-115.2k	KomBus/Modbus	250m	4-28V (<1.5mA
RS232 (D02)	UART	RS232	9600-115.2k	KomBus/Modbus	10m	4-28V (<1.5mA
Raw Output (A00)	Voltage	14uVW^-1 m^-2	–	–	Short	No supply
Voltage Output 1 (A01)	Voltage	0-1 to 0-3V	–	–	10 to 20m	4 – 30V (1.5 mA)
4-20mA Current O/P(A02)	Current	4-20mA	–	–	250m	4 – 40V (4-20mA)
Voltage Output 2(A03	Voltage	0-3 to 0-10V	–	–	20 to 40m	4 – 30V ((<2.5 mA)2.5 mA)
Voltage Output 2(A03	Voltage	0-3 to 0-10V	–	–	20 to 40m	4 – 30V (<2.5 mA)
Radio 1	Radio	433 MHz	9600-115.2k	Please See User Manual for Details	Please See User Manual for Details	Internally Lithium Powered
Radio 2	Radio	930 MHz
Radio 3	Radio	2400 MHz
Calibration
Calibration Facility	KEPL Sensor Calibration Facility
Traceability Offered	IMD(India) / WRR (WMO, Switzerland)
Accessories
Included With Sensor	Mounting Accessories, Setup Software (for Windows), Mating Connector (Wired Versions), 10m Sensor Cable
To Be Separately Ordered	Extra Cable, Readout, Connectivity Adapter for USB, R232, Radio etc
Notes. 1.The – D01 is the reference version. 2. Resolution specified is as applicable to DXX versions with digital output. In the Case of -AXX Analog Outputs this represents the minimum (it may be higher) encoding resolution and the resolution available to user may actually depend on the host data acquisition system. 3. All sensors typically undergo a post-production calibration. 4. Settling Time / Response Time specifications are with averaging set to minimum. 5. The current consumption of the –A02 circuit is included in the 4-20mA signaling current; there is no current demand except the signaling current. 6. Cable length recommendations may be site-condition dependent. 7. Many parameters above may be customizable for OEM Customers, please contact factory with requirements. 8. Some specifications may not be applicable to analog output options. 9. Current consumptions specifications do not include current sunk by the host system (data logger) except in 4-20mA analog output option. 4-20mA option includes power supply current in signaling current.

Leaf Wetness Sensor (KDS-151)

The KDS-151 by Komoline Aerospace is an advanced sensor designed for measuring leaf wetness in agro-meteorology and greenhouse studies. Featuring a glass-epoxy plate with gold-plated interdigitated surface conductivity patterns, it accurately simulates leaf conditions. It is built for stability and reliability, and provides precise performance over extended periods in Indian environments.

Parameter	Conditions	Min	Type	Max	Units
Leaf Wetness
Type of Sensor	Dielectric
Accuracy			±5
Resolution		1			%
Output Units		%			%
Range of measurement		0		100	%
Environmental
Storage Temperature		-40		+85	C˚
Operating Temperature	Non-Frosting	-20		+65	C˚
Electrical
Supply Voltage		4	9 to 12	14	V
Supply Current	Active		3.5		mA
Power-On Latency				1	s
Power-On Settling Time				15	s
Deployment
Location		Outdoor Ground-Mount
Cable Length-Normal Version (KDS Series)				250	m
Cable Length-Distance Version (KDD Series)				1000	m
Output
Type		Serial Digital Asynchronous (UART)
Electrical Interface		RS485 Multi-Drop Addressable
Measurements		Free Running
Baud Rate		9600
Start, Stop Bits		1,1
Responses		Externally Commanded

Hydrology

Wideband Panspectral Net Radiation Sensor (KDS-512)

Leaf Wetness Sensor (KDS-151)

Komoline Aerospace Limited

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