Pointer metal tube flowmeter 

Measuring range: water (20 °C) :1-200000I / h; air (20 °C, 0.1.13Mpa); 0.03 ~ 4000m3 / h
Turndown ratio : Standard: 10:1 ; special type: 20:1 ;
Accuracy: Standard: 1.5 ; special type: 1.0 ;
Pressure Rating :
Standard : DN15-DN50 4.0Mpa; DN80-DN200 1.6Mpa;
Special type : DN15-DN50 25Mpa DN80-DN200 16Mpa
Pressure loss : 7Kpa ~ 70Kpa;
Medium temperature : Standard : -40 °C ~ 100 °C; high temperature : 100 °C ~ 450 °C;
Medium viscosity :
DN15: n <5mPa.s (F15.1-F15.3) n <30mPa.s (F15.4-F15.8);
DN25: n <30mPa.s;
Ambient temperature: Remote Type : 40 °C ~ 185 °C ( LCD will not be damaged ) LCD work at -30 °C ~ 80 °C
Connection: Standard : DN201 standard flange ; special type: specified by the user at any standard flanges or threaded ;
Cable Interface : flameproof as 1/2NPT internal thread , other M20 `1.5 internal thread ;
Power supply:
Standard : 24VDC wire 4-20mA (12VCD-32VCD;
Alarm type : 24VDC three-wire 4-20mA (18VCD-28VCD;
AC type :85-265VCD 50Hz;
Battery type : 3.6V, 7.5AH Lithium battery , can be used continuously for three years ;
Load characteristics :
Wire : Rlmax = 50 • (-12) = 600 @ 24V;
Alarm : maximum load resistance is 200, AC type : Maximum load resistance is 200 ;
Alarm output: upper or lower instantaneous flow alarm ; switch alarm ; relay output ;
LCD : display instantaneous flow range :0 -50000 ( available with a decimal point )
Protection class : IP65.