Instrument Transducers Sapfir-22M, Sapfir-22MT, Sapfir-22-Ex-M
Purpose
Transducers of Sapfir series are designed for continuous conversion of all kinds of liquid and gas
pressure into unified current output signal in controlling systems including explosive
manufacture. Design version corresponds to explosion protection.
The transducers can be used in devices designed for conversion of liquid level values, liquid or
gas flow rate.
Design version IP 65 corresponds to ГОСТ 14254. Other climatic design versions are made on
request and correspond to ГОСТ 15150.
The transducers are proof against the relative humidity of ambient air:
98% at 35°C and lower temperatures without condensation of moisture for all climatic versions,
except T;
100% at 35°C and lower temperatures without condensation of moisture for the climatic version
T.
Main Technical Characteristics
Each converter may be adjusted to any upper measurement limit that is preset for the chosen
model. Lower measurement limit is zero. On customers request the transducers can be
manufactured with units of pressure: kgf/m2, kgf/cm2, bar.
Upper measurement limit
Absolute pressure:
Overpressure:
Rarefaction:
Pressure difference:
Pressure-rarefaction:
0.025 - 160 bar (0.360 - 2321.00 psi)
0.0016 - 1000 bar (0.023 - 14500.00 psi)
0.01 - 1 bar (0.145 - 14.50 psi)
0.01 - 160 bar (0.145 - 2321.00 psi)
0.0008 - 1 bar (0.0116 - 145 psi) rarefaction
0.0008 - 24 bar (0.0116 - 348.1 psi) overpressure
Limits of allowable basic error expressed in per cent, must not exceed
Transducers with LCD indicator:
± 0,15 and ± 0,25
Transducers with upper measurement limits or the sum of upper measurement limits:
from 1 kPa (0.01 bar) to 100 MPa (1000 bar)
± 0,25
from 0,4 kPa(0.004 bar) to 100 MPa (1000 bar)
± 0,5
from 0,16 kPa (0.0016 bar) to 0,25 kPa (0.0025 bar)
±1
Limiting values of output signals and DC supply voltage depending on link connection and
explosion protection.
Output signal, mA
Supply voltage, V
Link connection
0 – 5; 5 – 0
4 – 20; 20 – 4
(36±0,72)
15 – 42
four-wires
four-wires,two-wires
Version of
explosion
protection
н/в, ВН
н/в, ВН
4 – 20; 20 – 4
24
two-wires
Ex
Power consumption of the transducers
for the transducers with output signal 4 – 20 mA or 20 – 4 mA:
for the transducers with output signal 0 – 5 mA or 5 – 0 mA:
no more than 0,8 V·A
no more than 0,5 V·A