Single Flange High Temperature Flat Membrane Pressure Transmitter

• Product Description

Used to measure the level, density, and pressure of liquids, gases, or vapors, and then convert them into a 4-20mA DC signal output. The intelligent type can communicate with a HART handheld communicator for setting, monitoring, or forming a field monitoring system with a host computer. The HQ-1151/3051/3851/3351DP field-adjustable intelligent differential pressure transmitter is a new product developed by our company according to field requirements. It can be operated independently of a handheld communicator, with zeroing and configuration performed via buttons.

Details:
Performance Specifications

(Reference conditions: No migration, silicone oil port filled, 316L diaphragm)

★Output Signal: 4~20mA DC/RS485 digital communication

4~20mA DC/HART protocol digital communication (optional)

★Transmission Method: Two-wire system.

★Accuracy
Accuracy: ±0.1%, ±0.2%, ±0.5% (Intelligent type)

★Stability: For DP range codes 3, 4, and 5, +0.2% of the highest range; for other range codes, ±0.25% of the highest range.

★Humidity: 0~100% relative humidity.

★Start-up Time: Maximum 2 seconds at minimum damping.

★Volume Absorption: Less than 0.16 cm².

★Damping: Electrical damping is 0~32 seconds. Additionally, the sensing element has a constant damping time of 0.2 seconds (0.4 seconds for range 3).

★Static Pressure Influence (DP Transmitter)
Zero-point Error: +0.25% of the highest range for 14 MPa; +0.5% of the highest range for range code 3. This can be corrected through zero-point adjustment.

Range error: Correctable to +0.25% of the input reading per 6 MPa, or +0.5% for range designation 3. This error can be eliminated by adjustment before installation.

★ Static pressure effect (HP transmitter)

Zero point error: ±1.0% for the highest range at 32 MPa. Correctable by zero point adjustment.

★ Temperature effect
Zero point error at the highest range: +0.5% of the range per 56°C. Total effect including range and zero point error: ±1.0% of the range per 56°C. The effect is doubled for range designation 3.

Zero point error at the lowest range: ±3% of the range per 56°C. Total effect including range and zero point error: ±3.5% of the range per 56°C. The effect is doubled for range designation 3.

★ Vibration effect: +0.05% per g in any direction for frequencies from 0 to 200 Hz, upper limit. ★Power Supply Influence: Less than 0.005% /V of the calibrated range.

★Installation Position Influence: Zero drift not greater than (0.25kPa), this error can be eliminated through calibration and has no impact on the range.

★Electromagnetic Interference/RF Interference Influence: Tested according to SAMA PMC33.1, from 20 ~ 000MHz, field strength can be up to 30V/m. Structural Specifications

Materials in Contact with Media:

Isolation Diaphragm: 316L stainless steel, Hastelloy C-276, Monel alloy, or tantalum. (Optional)

Exhaust/Drain Valve: 316 stainless steel, Hastelloy, or Monel alloy.

Process Flanges and Connectors: 316 stainless steel, Hastelloy, or Monel alloy.

O-rings in Contact with Media: Fluororubber, Nitrile rubber. (Optional)

→ Filling fluid: Silicone oil

→ Bolts: Cadmium-plated carbon steel

→ Electronic circuit housing: Low-copper aluminum

→ O-rings: Nitrile rubber, fluororubber (optional)

→ Paint: Polyurethane.

Process connections: For transmitters with range codes 3, 4, and 5, the center-to-center distance between the two flanges is 54 mm, with NPT1/4-18 on the holes; for transmitters with codes 6 and 7, it is 56 mm and NPT1/4-18; for transmitters with code 2.8, it is 57.2 mm and NPTI/4-18. For transmitters with range codes 3, 4, and 5, the pressure taps on the two connectors are NPT1/2-14, and the flange connectors can be flipped to provide center distances of 50.8 mm, 54 mm, or 57.2 mm respectively.

Electrical connections: Equipped with field-connected online test terminals.

Weight: Excluding optional parts, AP, DP, GP, and HP models weigh 2.8 kg. Usage Conditions

Overall protection performance meets: IP67 (related parameters)

★Power Supply Voltage:

16V ~ 45V DC Intrinsically safe explosion-proof products must be powered by a corresponding safety barrier (standard is 24V DC)

★Product Operating Environment

Operating Temperature: -25℃ ~ +85℃
Storage Temperature: -40℃ ~ +104℃
Humidity: 0 ~ 90%
Explosion-proof Product Operating Environment Conditions:
Temperature: -20℃ ~ +40℃
Relative Humidity: 5% ~ 95%
Atmospheric Pressure: 86 ~ 106kPa
Intrinsically safe product external safety barrier parameters:
U0≤28V DC 10≤30mA P0≤0.84W

Product Selection

Figure

Application