Đồng hồ đo HM PSC-150

EC Range: 0-9999 µS
TDS Range: 0 - 5000 ppm
Temperature Range: 1-75°C; 33-167 °F 
Accuracy: ±2% 
Conversion Factor: NaCl (avg. 0.5)
Resolution: 0.1 µS/ppm (0-999); 1 µS/ppm (1000-9999)
ATC: Yes (1 - 65°C)
Calibration: Adjustable (manual)
Setting: Controlled by on-screen up/down buttons
Relay Control: The unit will open or close a circuit via dry contacts when the ppm/µS level reaches or exceeds the control setting (simple switch).  It can be used to control a pump, solenoid valve or other device. 
Relay Voltage: 5V
Alarm: Optional steady beep (set by user)
Display: Bright 5/8" L.E.D. display
Probe: 1/2" bushing, 3 meter (9.8 ft) shielded cable
Power supply: AC 110V / AC 220V
Dimensions: 7.2 x 7.2 x 10.2 cm (2.8 x 2.8 x 4 in.)
Monitor Weight: 476 g (1 lb .8 oz)
Total Weight: 680.4 g (1 lb 8 oz)