Type of primary element (internal diameter of the measuring pipeline, mm)
orifice with angle tapping (50–3000 mm),
orifice with flange or three-radius tapping (50–1000 mm);
nozzle ISA 1932 (50–1000 mm);
Venturi nozzle (65–500 mm);
Venturi pipe (50–1200 mm);
non-standard constriction devices (92; 144 mm);
special constriction device: orifice with conical inlet (12.5–100 mm)
- flow transducer with a conical orifice, relative diameter 0.1–0.64 (MI 3572-2016) (8–12.5 mm)
- primary flow transducer with hydraulic resistance (MI 3580-2017) (0.15–4.2 mm)
Flow measurement range using a standard constriction device
from 10 to 5,500,000 Sm3/h (gas including natural gas);
from 0,01 to 4,000 t/h (water vapor);
from 0,8 to 20,000 t/h (liquid including water)
Flow measurement range when using a flow converter with a conical orifice with a relative diameter of 0.1-0.64 (MI 3572-2016):
liquids from 1 to 1000 kg/h
gas (including natural gas) from 0.1 to 500 Sm3/h
Flow measurement range when using a volume flow meter (sensor) in the corrector mode
from 40 to 40,000 Sm3/h (gas, including natural gas)
Liquid flow measurement range when using a primary flow transducer with hydraulic resistance (MI 3580-2017)
from 0.001 to 120 kg/h
Thermal power measurement range
from 0.05 to 5,000 Gcal/h
Calorific value measurement range
from 0.4 to 200,000 GJ/h
Relative error limits, %:
flow calculation
±0,01; ±0,05
thermal energy calculation
±0,05; ±0,3
Excess pressure measurement upper limits, MPa
0.25; 0.6; 2.5; 6; 16; 25; 32; 60;
fraction error δ = ± (0.01+0.1(Р/Рmах))
Absolute pressure measurement upper limits, MPa
0.25; 1; 3; 6;
fraction error δ = ± (0.01+0.1(Р/Pmах))
Pressure difference measurement upper limits, kPa
6; 10; 25; 40; 100; 250;
fraction error δ = ± (0,01+0,1(dР/dРмах))
Pressure difference and pressure channel measurement range
1 : 100
Flow measurement range
1 : 10; up to 1 : 40 using an additional differential pressure sensor
Temperature measurement limits, °C
copper RTTs with α=0.00428 °C-1: -180...+200; platinum RTTs with α=0.00385 or 0.00391 °C-1: -200 to +400
Temperature measurement error
± 0,25°С
Time measurement error
± 0,01%
Hourly data recording trace archive size
104 days by pressure, pressure difference, medium temperature, accumulated flow and heat output channels
Daily data recording trace archive size
600 days by pressure, pressure difference, medium temperature, accumulated flow and heat output channels
Interventions trace archive size
2000 messages
Power supply
Network: from the intrinsically safe barrier BIZ-002; Autonomous: from the built-in power supply 45 000 hours
Average lifetime
25 years
Verification interval
From 1 to 3 years (depending on the S, A, B, V or G accuracy design)
Dimensions, mm
160х103х260 (electronic unit)
Weight, kg
no more than 10 (electronic unit)
Operating conditions
Ambient temperature from -60 to + 60 °С
Ingress protection design
At least IP 54 according to GOST 14254-96
Designation of the document used as the basis for manufacturing the instrument
KRAU1.456.001-01 TU