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| Brand | BJBY |
|---|---|
| Model | UV254M |
| Spectral Range | 220–275 nm |
| Display | Dual 4-digit LCD with backlight |
| Measurement Ranges | High/Low auto-ranging |
| Mounting | Standard 1/4″-20 tripod socket |
| Calibration | NIST-traceable certificate included |
| Data Logging | Auto-record mode with 20-point memory |
| Zero Adjustment | Manual offset compensation |
| Power | Battery-operated with low-battery indicator |
| Compliance | Meets ISO/CIE spectral responsivity requirements for UVC radiometry |
| Brand | BJBY |
|---|---|
| Origin | Beijing, China |
| Model | BY-2007Z |
| Type | Portable |
| Measurement Range | 0.0–200,000 lx (4 auto-ranging scales) |
| Accuracy | ±3% RD, ±0.5% FS |
| Repeatability | ±2% |
| Temperature Coefficient | ±0.1%/°C |
| Display | 3.5-digit LCD, digit height 15 mm |
| Sampling Rate | 2.0 readings/sec |
| Photodetector | Silicon photodiode with calibrated spectral filter |
| Dimensions | 150 × 70 × 39 mm |
| Calibration Reference | Standard planar lamp at 2856 K (CIE Illuminant A) |
| Brand | BJBY |
|---|---|
| Model | UV-2000 |
| Measurement Range | 0.1–199,900 µW/cm² |
| Spectral Response | 230–290 nm (Peak at 254 nm) |
| Accuracy | ±5% |
| Response Time | 1 s |
| Out-of-Band Rejection | <0.1% |
| Operating Temperature | 0–40 °C |
| Relative Humidity | <85% RH |
| Power Supply | 9 V alkaline battery |
| Power Consumption | ≤80 mW |
| Dimensions | 130 × 70 × 30 mm |
| Weight | 200 g |
| Probe Calibration | 254 nm UV-C specific |
| Brand | BJBY (Beijing Baoyun) |
|---|---|
| Origin | Beijing, China |
| Model | BY-TC1100 |
| Type | Portable Turbidimeter |
| Measurement Principle | 90° Nephelometric Scattering |
| Range Options | 0–20 NTU / 0–200 NTU |
| Minimum Detectable Value | 0.01 NTU (0–20 range) / 0.1 NTU (0–200 range) |
| Accuracy | ±8% of reading (±2.5% F.S.) |
| Repeatability | ≤1% |
| Zero Drift | ±1% F.S. |
| Light Source | Long-life LED (90° scattering geometry) |
| Warm-up Time | ≤30 s |
| Power Supply | 9 V alkaline battery or AC/DC adapter (220 V AC / 50 Hz input |
| Dimensions | 235 × 75 × 65 mm |
| Display | Backlit LCD with microprocessor control |
| Auto Functions | Auto-zero, auto-calibration, auto-shutdown after 10 min inactivity |
| Data Interface | Analog/digital output port (RS-232 or TTL-level, configurable) |
| Compliance | ISO 7027:2016 (Nephelometric method for turbidity measurement) |
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