Senseca
HD2021T Illuminance And Irradiance Transmitter
Overview
The HD2021T transmitter family converts photometric illuminance (lux) and radiometric irradiance (W/m²) into a 0…10 Vdc output signal. The family covers visible illuminance, solar radiation in the 400…1050 nm band, and UVA, UVB and UVC irradiance. Versions with 0…1 V, 0…5 V and 4…20 mA outputs are available on request for orders of minimum 5 units.
It is used for lighting control in offices, production areas, commercial sites, theatres, museums, sports facilities, roadway lighting, tunnels and nursery-gardening systems, as well as for tanning lamp control and UVC monitoring in sewage treatment plants. The transmitters are suitable for indoor and outdoor installation (IP66) and are factory calibrated to the full-scale range specified at the time of order.
Key Features
- Model-specific sensing: Si, GaP and SiC photodiodes with filters matched to visible, VIS-NIR, UVA, UVB or UVC measurement
- Standard 0…10 Vdc output, with 0…1 V, 0…5 V or 4…20 mA on request (minimum order 5 pcs)
- Factory calibrated to the full-scale range specified at the time of order
- Viewing angle corrected in accordance with the cosine law
- Sensitivity potentiometer for adjustment after installation, for example against a reference luxmeter
- Sensitivity can be reduced on request for extremely intense light sources
- IP66 protection for indoor and outdoor installation
- Protected against polarity inversions
Specifications
Models
| HD2021T | Si photodiode; spectral range curve V(λ); photometric (illuminance, lux); sensitivity in mV/lux |
| HD2021T1 | Si photodiode; spectral range 400…1050 nm; radiometric; sensitivity in mV/(mW/m²) |
| HD2021T2 | GaP photodiode; UVA; radiometric; sensitivity in mV/(mW/m²), peak 360 nm |
| HD2021T3 | SiC photodiode; UVB; radiometric; sensitivity in mV/(mW/m²), peak 305 nm |
| HD2021T4 | SiC photodiode; UVC; radiometric; sensitivity in mV/(mW/m²), peak 260 nm |
Measuring ranges
| HD2021T | A: 0.02…2 klux; B: 0.2…20 klux; C: 2…200 klux |
| HD2021T1 | A: 0.2…20 W/m²; B: 2…200 W/m²; C: 20…2000 W/m² |
| HD2021T2 | A: 0.2…20 W/m²; B: 2…200 W/m²; C: 20…2000 W/m² |
| HD2021T3 | A: 2…200 W/m²; B: 20…2000 W/m² |
| HD2021T4 | A: 2…200 W/m²; B: 20…2000 W/m² |
Other ranges are available on request for at least 5 pcs per order.
General
| Viewing angle | Corrected in accordance with the cosine law |
| Output signal | 0…10 V (0…1 V, 0…5 V on request, minimum order 5 pcs); 4…20 mA |
| Power supply | 16…40 Vdc or 24 Vac for 0…10 V output; 10…40 Vdc or 24 Vac for 0…1 V or 0…5 V output; 10…40 Vdc for 4…20 mA output |
| Power consumption | 10 mA |
| Working temperature | -20…+60 °C |
| Electrical protection | Protected against polarity inversions |
| Protection degree | IP66 |
| Maximum cable length | 150 m with 4…20 mA output; 10 m with voltage outputs |
| Dimensions | 60 x 66 mm housing, 35 mm deep, plus 17 mm optic |
Installation notes
- Voltage-output models have three terminals: GND, +Vdc and Vlux (output). Current-output models have two terminals: +Vcc and Iout. Connect the cable shield to GND.
- For lamp intensity monitoring, install the illuminance transmitter on the ceiling close to the area to be monitored.
- Place a reference luxmeter in the operating area and adjust the sensitivity potentiometer until the desired reference value is obtained.
Ordering code
HD2021 + model + . + output + range
Model: T = illuminance (lux); T1 = VIS-NIR irradiance; T2 = UVA irradiance; T3 = UVB irradiance; T4 = UVC irradiance.
Output: A = 4…20 mA current output; V = 0…10 Vdc voltage output.
Measuring range: A, B or C (see measuring range table).
