HACH TL2310 LED Turbidimeter 

Specifications:
Accuracy: ±2% of reading plus 0.01 FNU/NTU from 0 - 1000 FNU/NTU
Air purge: Dry nitrogen or instrument grade air (ANSI MC 11.1, 1975)
0.05 L/s at 69 kPa (10 psig); 138 kPa (20 psig) max
Hose barb connection for 1/8-inch tubing
Certifications: CE, KC, RCM
Communication: USB
Compliance: ISO
Data logging: 2000 total logs, includes reading log, verification log and calibration log
Dimensions (H x W x D): 153 mm x 395 mm x 305 mm
Display: 17.8 mm color touch screen
Interface: 2 USB-A ports for USB flash drive, external printer, keyboard and barcode scanner
Light source: Light-emitting diode (LED) at 860 ± 30 nm
Measurement method: Nephelometric
Model: TL2310
Operating temperature range: 0 - 40 °C
Power requirements (Amps): 3.4 A
Power requirements (Hz): 50/60 Hz
Power requirements (Voltage): 100 - 240 VAC
Range: 0 - 1000 NTU