Models of quartz pressure and temperature transducers PDTK-P-MD

Таблица перевода единиц измерения давления

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/см^{2 1 мм вод.ст. = 1 кгс/м^{2
1 атм = 101.325 ∙ 10³Па}}Па

1 Па = 1000МПа
1 МПа = 7500 мм. рт. ст.
1 МПа = 106 Н/м²

Pressure table

Авторизация

Models of quartz pressure and temperature transducers PDTK-P-MD manufacturing in 2019 year

Applications

Quartz pressure and temperature transducers assign for precision measuring of pressure in oil and gas downholes.

Leading particulars

Quartz piezoresonance sensitive pressure crystal
Quartz temperature-sensitive crystal
High long-term stability
Pressure measuring error till ±0.06% FS
High pressure channel resolution ±0.0003% FS
High temperature channel resolution ±0.005°С
Wide interval of operating temperatures till -40..+150°С
Frequency output signal ensure possibility of measuring without A to D converter
Bellows separator made of stainless steel 12Х18Н10Т, 36НХТЮ or Inconel 625;
Case made of stainless steel 12Х18Н10Т or Inconel 718.

Technical specification

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 elements provides high long-term stability of measuring. The oscillators are manufactured on high temperature electronics and have different variations of performance for operating on self-resonant frequency (50±2.5)kHz or difference frequency (0.8±0.3) kHz.

It is possible to manufacture the transducers with digital interface RS-485, to order: UART, I2C,SPI.

Parameters	Values				Units
Maximum measuring absolute pressure Р	25	40	60	80	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	90; 100; 125; 150				°С
Maximum temperature of operability	110; 130; 160				°С
Minimum operating temperature	-40; 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	±0,5				°С
Zero drift at the working till 130°С	γ				% FS in a year
Zero drift at the working from 130°С till 150°С	2γ				% FS in a year
Frequency of output signal at atmospheric pressure	50±2.5/0.8±0.3				kHz
Frequency of output signal at 25 °С	32.7±0.3/0.5±0.2				kHz
Current consumption for frequency output, no more	0.8; 3				mA
Current consumption for digital output, no more	10				mA
Input supply voltage	2.8-14				V
Weight, no more	350				gr

Size (drawing) of the transducers are on page 2.

Value of measuring pressure and temperature is possible to calculate using polynoms:

P=P₀+a₁F_t+ a₂F_t²+ a₃F_p+ a₄F_p²+a₅F_tF_p,
Т=T_o+c₁F_t+c₂F_t²+c₃F_t³

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.

Information for order

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).

The structure of marking the transducer for the order: PDTK-P-E-Т-MD-ХХ-АХ

PDTK – quartz pressure and temperature;

Р – upper limit of measuring pressure in MPa;

E- basic error, % from upper limit of measuring (FS) (possible values: 0.06; 0.1; 0.15; 0.25; 0.5);

Т – upper limit of operating temperatures, 0С (90; 100; 125; 150);

М – metal case;

D – downhole (application);

ХХ – generation of transducers and modification of the case (2Х, 3Х, 4Х, 5Х 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):

- D output signal with digital code, Х – marking of interface of output digital signal:

- 1 - RS485;

- 2 - UART;

- 3 - SPI;

- 4 - I2C.

- F output signal in the view of frequency from pressure el 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 type «1», which is dismantling before shipping the transducer to the customer.

- «1» - oscillator, on which input the self-resonant frequency of connecting crystal (for heat-sensitive crystal from 31 till 36 kHz, for manometric crystal from 40 till 52 kHz);

- «2» – beat-frequency oscillator (for temperature sensitive crystal from 0.3 till 1.0 kHz, for manometric crystal from 0.5 till 5.0 kHz);

The examples of designation quartz pressure and temperature transducers:

1. with the upper limit of pressure measuring 60 MPa, with basic error ± 0.06% from FS, with the upper operating temperature 125 0С, downhole, with digital output signal, interface RS-485 with substandard communications protocol.

PDTK-60.0-0.06-125-МD-41-D1;

2. with the upper limit of pressure measuring 60 MPa, with basic error ±0,1 from FS, with the upper operating temperature 150 0С, downhole, without electronics.

PDТК-60.0-0.1-150-МD-30-F0.

Variants of transducers manufacturing

PDTK-Р-E-Т-МD-22-Aх

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0; F1; F2; D1; D2; D3; D4.	Аx - F0; F1; F2

PDТК-Р-E-Т-МD-30-Aх

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0; F1; F2; D1; D2; D3; D4.	Аx - F0; F1; F2.

PDТК-Р-E-Т-МD-40-Aх

Low-temperature
P - 25; 40; 60; МPа
E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100 °С
Ax - F0.

PDТК-Р-E-Т-МD-41-Ax

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0; F1; F2; D1; D2; D3; D4.	Аx - F0; F1; F2.

PDТК-Р-E-Т-МD-43-Aх

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0; F1; F2; D1; D2; D3; D4.	Аx - F0; F1; F2.

PDТК-Р-E-Т-МD-44-Aх

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0.	Аx- F0.

PDТК-Р-E-Т-МD-50-Aх

Low-temperature	High-temperature
P - 25; 40; 60; 80 МPа	P - 25; 40; 60 МPа
E – 0.06; 0.1; 0.15; 0.25; 0.5 %	E – 0.1; 0.15; 0.25; 0.5 %
T - 90; 100; 125 °С	T - 150 °С
Ax - F0.	Аx - F0.