Единицы | бар | мм рт.ст. | мм вод.ст. | атм (физич.) | кгс/м2 | кгс/см2 (технич. атм.) | Па | кПа | Мпа |
---|---|---|---|---|---|---|---|---|---|
1 бар | 1 | 750.064 | 10197,16 | 0.986923 | 10.1972 ∙ 103 | 1,01972 | 105 | 100 | 0.1 |
1 мм рт.ст. | 1.33322 ∙10-3 | 1 | 13,5951 | 1.31579 ∙10-3 | 13,5951 | 13.5951 ∙10-3 | 133.322 | 133.322 ∙10-3 | 133.322 ∙10-6 |
1 мм вод.ст. | 98.0665 ∙10-6 | 73.5561 ∙ 10 -3 | 1 | 96.7841 ∙10-6 | 1 | 0.1∙10-3 | 9.80665 | 9.80665 ∙10-3 | 9.80665 ∙10-6 |
1 атм | 1.01325 | 760 | 10.3323 ∙103 | 1 | 10.3323∙ 103 | 1.03323 | 101.325 ∙ 103 | 101.325 | 101.325 ∙10-3 |
1 кгс/м2 | 98,0665 ∙10-6 | 73.5561 ∙ 10 -3 | 1 | 96.7841 ∙10-6 | 1 | 0.1∙10-3 | 9.80665 | 9.80665 ∙10 -3 | 9.80665 ∙10-6 |
1 кгс/см2 | 0,980665 | 735.561 | 10000 | 0.967841 | 10000 | 1 | 98.0665 ∙ 103 | 98.0665 | 98.0665 ∙10-3 |
1 Па | 10 -5 | 7.50064 ∙10-3 | 0,1019716 | 9.86923 ∙10-6 | 101.972 ∙ 10-3 | 10.1972 ∙10-6 | 1 | 10 -3 | 10 -6 |
1 кПа | 0.01 | 7.50064 | 101,9716 | 9.86923 ∙10-3 | 101.972 | 10.1972 ∙10-3 | 103 | 1 | 10 -3 |
1 МПа | 10 | 7.50064 ∙103 | 101971,6 | 9.86923 | 101.972 ∙103 | 10.1972 | 106 | 103 | 1 |
К системе СИ относятся: Инженерные единицы:
Бар
1 бар = 0,1 Мпа 1 мм рт.ст. = 13.6 мм вод.ст.
1 бар = 10197.16 кгс/м2 1 мм вод.ст. = 0.0001кгс/см2
1 бар = 10 Н/см2 1 мм вод.ст. = 1 кгс/м2
1 атм = 101.325 ∙ 103 Па
Па
1 Па = 1000МПа
1 МПа = 7500 мм. рт. ст.
1 МПа = 106 Н/м2
Hightemperature quartz pressure and temperature transducers PDTK-P-MD manufacturing in 2019 year
Quartz pressure and high temperature transducers assign for precision measuring of pressure in oil and gas downholes at high temperature.
PDTK-MD transducers provides precision measuring of absolute pressure and temperature in hostile environment for example in oil or gas downholes. The compensation of temperature error enable to use the transducer in wide temperature range. Oil-filled bellows separator made of stainless steel provides the protection of quartz crystal from hostile environment and passing the pressure with minimum error. Quartz pressure and temperature sensitive crystal provides high long-term stability of measuring.
Parameters |
Values |
Units |
||
Maximum measuring absolute pressure Р |
25 |
40 |
60 |
MPa |
Pressure sensitivity |
-81±5 |
-62±3 |
-42±3 |
Hz/MPa |
Minimum measuring pressure |
0,07 |
% FS |
||
Pressure resolution* |
±0,0003 |
% FS |
||
Maximum operating temperature |
180 |
°С |
||
Maximum temperature of operability |
180 |
°С |
||
Minimum operating temperature |
0; +20 |
°С |
||
Temperature resolution* |
±0,005 |
°С |
||
Temperature sensitivity at 37°С |
2 |
Hz/°С |
||
Basic error, (γ) |
±0,06; ±0,1; ±0,15; ±0,25; ±0,5 |
% FS |
||
Temperature error |
±0,3; ±0,5 |
°С |
||
Zero drift at the working till 130°С |
γ |
% FS in a year |
||
Zero drift at the working from 130°С till 180°С |
2γ |
% FS in a year |
||
Frequency of quartz pressure crystal at P=atm. |
50.0 ±2.5/ 0.8±0.3 |
kHz |
||
Frequency of quartz temperature sensitive crystal at 25°С |
32.7±0.3 / 0.5±0.2 |
kHz |
||
Weight, no more |
350 |
gr |
*depend on scheme of oscillator
Size (drawing) of the transducers are on page 2.
Value of measuring pressure and temperature is possible to calculate using polynoms:
Fp - frequency value of pressure channel; Ft - frequency value of temperature channel;
Ро,То,a1, a2, a3, a4, a5, c1, c2, c3, - coefficients calculated at calibration of the transducer (are in passport supplying with the transducer). The polynoms with the big quantity of coefficients can be used for making the accuracy less in the wide temperature range.
To order the transducer you can contact by e-mail This email address is being protected from spambots. You need JavaScript enabled to view it. or by telephone 8(48532)5-46-74. You should point operating pressure range, operating temperature range, basic error, body model, output signal, type of oscillator (self or different frequency for frequency output signal).
PDTK – quartz pressure and temperature;
Р – upper limit of measuring pressure in MPa;
E- basic error, % from upper limit of measuring (FS) (possible values: 0,1; 0,15; 0,25; 0,5);
Т – upper limit of operating temperatures, 0С (180);
М – metal case;
D – downhole (application);
ХХ – generation of transducers and modification of the case (2Х, 4Х look attachment 1)
А – modification by output signal (each generation and modification of the case have three modifications by output signals with the next marking):
- F output signal in the view of frequency from pressure and temperature channels, Х – marking of self-oscillator type:
- «0» - satisfy to modification of transducer without electronics, for connecting to excitation system of free oscillation or to customer’s oscillator. Besides the transducer is previously calibrating with the oscillator, which is dismantling before shipping the transducer to the customer.
The examples of designation quartz pressure and temperature transducers:
PDТК-60,0-0,1-180-МD-45-F0.
1. PDTK-Р-E-Т-МD-22-Ax |
2. PDТК-Р-E-Т-МD-45-Ax |
3. PDTK-P-E-T-MD-31-F0 |
High-temperature |
High-temperature |
High-temperature |
P - 25; 40; 60 МPа |
P - 25; 40; 60 МPа |
P - 25; 40; 60 МPа |
E - 0,1; 0,15; 0,25; 0,5 % |
E - 0,1; 0,15; 0,25; 0,5 % |
E - 0,1; 0,15; 0,25; 0,5 % |
T - 180 °С |
T - 180 °С |
T - 180 °С |
Аx - F0. |
Аx - F0. |
Аx - F0. |