· It can output directly digital signal, and aslo can convert to WIFI or GPRS signal.
· It is combintion sensor with pH,ORP, temperature and conductivity.
· Unique structure prevents the sensor from easy pollution and blockage,Long life.
· It is unnecessary to refill electrolyte, convenient use.
· pH range:0~14pH; Pressure range:0.6Mpa.
· Temperature range: 0~80ºC.
· ORP rang: -1500mv ~ +1500mv.
· Conductivity rang: 0 ~ 20000us/cm.
· The external dimension of the sensor is φ25x165.
· The thread is 3/4NPT.
· The outer tube material : PPS plastic. 
Selection of model:
· PT2121D combination digital pH sensor
· RT2121D combination digital ORP sensor
· PRT2121D pH,ORP, temperature three in one digital sensor
· PRCT2121D pH,ORP,conductivity ,temperature four in one digital sensor