Supported Applications
The Omega HHUV254SD is a handheld UVA and UVC light meter designed for measuring light intensity in the UVA (365 nm) and UVC (254 nm) bands. The series supports industrial applications including welding, UV sterilization, photochemical matching, EEPROM erasure, graphic arts, photore sist exposure, and curing of inks, adhesives, and coatings.
When mated with a Type K or Type J thermocouple via the dedicated socket (callout 1-8), the meter also measures surface temperature. The device is not designed for use in human applications.
Operating Conditions & Performance
The HHUV254SD operates within an ambient temperature range of 0 to 50°C (32 to 122°F) and a relative humidity of 0 to 85% RH. The meter features automatic switching between two full-scale ranges: 2 mW/cm² and 20 mW/cm², covering wavelengths from 240 to 390 nm.
Performance specifications include:
• Measurement Accuracy (Light): ±4% of full scale reading + 2 digits.
• Temperature Measurement Ranges and Accuracy:
• Type K: -50 to 1300°C (±0.2% + 0.5°C), -50.1 to -100°C (±0.2% + 1°C); -58 to 2372°F (±0.2% + 1°F), -58.1 to -148°F (±0.2% + 1.8°F).
• Type J: -50 to 1200°C (±0.2% + 0.5°C), -50.1 to -100°C (±0.2% + 1°C); -58 to 2192°F (±0.2% + 1°F), -58.1 to -148°F (±0.2% + 1.8°F).
• Display: LCD with green backlight, measuring 52 x 38 mm (2.05 x 1.5").
• Data Logging Sampling Time: Settable from 1 sec to 1 hr.
Variance in Source Data
Note: The family manual lists a response time of 0.5 seconds and an accuracy of ±5% of reading, while the series-specific data sheet specifies light measurement accuracy as ±4% of full scale reading + 2 digits without listing a specific response time value.
Configuration Options
The HHUV254SD is configured with integrated UVA and UVC probes. The meter supports real-time automatic datalogging to SD memory cards ranging from 1 GB to 16 GB, including a supplied 2 GB card. It features an RS232 output jack for data acquisition software connectivity.
Power options include six AA alkaline batteries or an optional 9 Vdc AC adaptor. The meter includes settable parameters such as date, time, auto power off, beep sound, temperature unit (°C or °F), sampling time, thermocouple Type (K or J), and decimal point/comma selection.
Physical dimensions are:
• Meter: 177 H x 68 W x 45 mm D (6.97 x 2.68 x 1.77").
• UVA Probe Handle: 24 (diagonal) x 125 mm L (0.94 x 4.92")
• UVA Probe Head: 45 (diagonal) x 32 mm L (1.77 x 1.26").
• UVC Probe: 38 (diagonal) x 25 mm L (1.50 x 0.98").
Key Product Differences
The HHUV254SD is a single model configuration that includes the meter, UVA probe, UVC probe, Type K thermocouple, 2 GB SD memory card, hard carrying case, and operator's manual. The series supports optional field-installable accessories including spare 2 GB SD cards (2GB-SD), AC power adaptors (ADAPTER-SD), data acquisition software with RS232 cable (SW-U101-WIN), and spare RS232 interface cables (RS232-SD).
The meter features a subminiature connector for thermocouple input. The OMEGACARE™ extended warranty program is available, extending the standard 1-year warranty to a total of 4 years with OCW-3 coverage.
| Additional Features 1 | SD Card Data Logger, Includes UVA/UVC Probes |
| Battery Size and Type | Alkaline AA |
| Display Size | 52 x 38 mm (2.05 x 1.5 in) |
| Display Type | Backlit LCD |
| Height | 177 mm |
| Input Type | Thermocouple (Type J,K) |
| Length | 68 mm |
| Measurement Note | Full-Scale Autoranges: 2 mW/cm^2 and 20 mW/cm^2 |
| Memory | Max/Min |
| Memory Card | 1 to 16 GB |
| Operating Humidity | 0 to 85% RH |
| Operating Temperature, Max | 50 °C |
| Operating Temperature, Min | 0 °C |
| Sampling Time | 1 sec to 1 hr |
| Series ID | HHUV254SD-Meter |
| Supply Power Type | Battery |
| Temperature Range | Type K -50 to 1300ºC (±0.2% + 0.5ºC), -50.1 to -100ºC (±0.2% + 1ºC), -58 to 2372ºF (±0.2% + 1ºF), -58.1 to -148ºF (±0.2% + 1.8ºF),Type J -50 to 1200ºC (±0.2% + 0.5ºC), -50.1 to -100ºC (±0.2% + 1ºC), -58 to 2192ºF (±0.2% + 1ºF), -58.1 to -148ºF (±0.2% + 1.8ºF) |
| UV Light Types | UVA, UVC |
| Width | 45 mm |