HD2021T Illuminance and Irradiance Transmitter thumbnail 1

Senseca

HD2021T Illuminance and Irradiance Transmitter

One transmitter family for lighting, solar and UV monitoring
One output can control several adjustable power supply units at the same time
Suitable for indoor and outdoor installation
Long cable runs up to 150 m with the 4…20 mA version (on request)

Quantity

Overview

The Senseca HD2021T series are transmitters that convert photometric and radiometric quantities into a 0…10 Vdc signal: illuminance (lux), and irradiance (W/m²) in the UVA, UVB and UVC spectral regions and in the 400…1050 nm band. The output is factory calibrated to the full scale range specified when ordering.

Five models cover illuminance (HD2021T), VIS-NIR irradiance (HD2021T1), UVA (HD2021T2), UVB (HD2021T3) and UVC (HD2021T4), each using filters and photodiodes designed for its spectral region, with cosine-corrected response. With IP66 protection, the transmitters can be installed indoors or outdoors. 0…1 V, 0…5 V and 4…20 mA outputs are available on request for orders of at least 5 units.

Typical applications

Illuminance control in offices, manufacturing plants and production areas
Commercial sites, theatres, museums and sports facilities
Roadway lighting and tunnels
Nursery and gardening systems
Solar radiation control in the 400…1050 nm band
Tanning lamp irradiance control (UVA and UVB)
Filter efficiency checks in devices using high pressure lamps
UVC lamp monitoring in sewage treatment plants

Key Features

Five models: illuminance, VIS-NIR, UVA, UVB and UVC
Photodiode sensors (Si, GaP or SiC) with filters for each spectral region
Cosine-corrected viewing angle
0…10 V output, factory calibrated to the ordered full scale
0…1 V, 0…5 V or 4…20 mA output on request (min. 5 pcs)
Sensitivity adjustment potentiometer
IP66 protection for indoor and outdoor use
Protected against polarity inversion

Benefits

One transmitter family for lighting, solar and UV monitoring
One output can control several adjustable power supply units at the same time
Suitable for indoor and outdoor installation
Long cable runs up to 150 m with 4…20 mA output

Specifications

SENSOR AND SPECTRAL RANGE
HD2021T	Si photodiode, curve V(λ), photometric (mV/lux)
HD2021T1	Si photodiode, 400…1050 nm, radiometric (mV/(mW/m²))
HD2021T2	GaP photodiode, UVA, radiometric (mV/(mW/m²), peak 360 nm)
HD2021T3	SiC photodiode, UVB, radiometric (mV/(mW/m²), peak 305 nm)
HD2021T4	SiC photodiode, UVC, radiometric (mV/(mW/m²), peak 260 nm)
Viewing angle	Corrected in accordance with the cosine law

MEASURING RANGES (A / B / C)
HD2021T	0.02…2 klux / 0.2…20 klux / 2…200 klux
HD2021T1	0.2…20 W/m² / 2…200 W/m² / 20…2000 W/m²
HD2021T2	0.2…20 W/m² / 2…200 W/m² / 20…2000 W/m²
HD2021T3	2…200 W/m² / 20…2000 W/m²
HD2021T4	2…200 W/m² / 20…2000 W/m²
Other ranges	On request, minimum 5 pcs per order

OUTPUT AND POWER
Output signal	0…10 V (0…1 V, 0…5 V, 4…20 mA on request, minimum 5 pcs)
Power supply (0…10 V output)	16…40 Vdc or 24 Vac
Power supply (0…1 V or 0…5 V output)	10…40 Vdc or 24 Vac
Power supply (4…20 mA output)	10…40 Vdc
Power consumption	10 mA
Electrical protection	Protected against polarity inversions
Maximum cable length	150 m (4…20 mA); 10 m (voltage outputs)

ENVIRONMENTAL
Working temperature	-20…+60 °C
Protection degree	IP 66

MECHANICAL
Housing dimensions	60 x 66 x 35 mm (+ 17 mm sensor head)
Fixing holes	Ø 4.5 mm, 46.5 x 35.5 mm spacing

ORDERING CODES
HD2021T…	T = illuminance (lux); T1 = VIS-NIR; T2 = UVA; T3 = UVB; T4 = UVC
Measuring range	A / B / C (see ranges above)
Output	V = 0…10 Vdc voltage output; A = 4…20 mA current output