à¤Ã×èͧ¤Çº¤ØÁ pH / EC / TDS / DO à¤Ã×èͧÇÑ´¤èÒ¤ÇÒÁ¹Óä¿¿éÒ TDS Controlleter Conductivity Controller > PSC-154: TDS/EC Controller with 4-20mA Output à¤Ã×èͧÇÑ´¤èÒ¤ÇÒÁ¹Óä¿¿éÒ PSC-154: TDS/EC Controller with 4-20mA Output New controller includes extended range, digital calibration, on-screen temperature, tri-color display and 4-20mA output. FEATURES Monitors and controls TDS/EC levels for high output commercial systems. Large, bright L.E.D. display. 4-20mA output signal can connect to a PLC to record values. An alarm will sound if the TDS /EC level rises above the user-set level. A switch will control a device based upon the set point. On-screen temperature display (C/F). Installs easily in minutes. Includes one sensor probe (at no extra cost) (part #SP-1-PSC). Protective cover also available (sold separately) SPECIFICATIONS EC Range: 0-9999 µS TDS Range: 0 - 5000 ppm Temperature Range: 1-75°C; 33-167 °F Accuracy: ±2% (of the reading) Conversion Factor: NaCl (avg. 0.5) Resolution: 0.1 µS/ppm (0-999); 1 µS/ppm (1000-9999) ATC: Yes (1 - 65°C) Calibration: Digital by push button Set-Point: Single point, controlled by on-screen up/down buttons (to any point within the range) 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 Output Signal: Digital 4-20mA Output Accuracy (mA): ±1% 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) àª×èÍÁµèͪشá¨é§àµ×͹ SMS Alarm áÅÐ ¤Çº¤ØÁÍØ»¡Ã³ì·Ò§ SMS ä´é («×éÍà¾ÔèÁ) SMS Alarm á¨é§àµ×͹ Conductivity EC Meter HM Digital PSC-154 TDS Meter à¤Ã×èͧÇÑ´¤ÇÒÁ¹Óä¿¿éÒ à¤Ã×èèͧ¤Çº¤ØÁ ẺµÔ´¼¹Ñ§