✅ Professional Pressure Transmitter Manufacturer in China
We are a professional manufacturer of pressure transmitters for EPC projects, power plants, petrochemical, oil & gas, metallurgy, and industrial automation applications. A pressure transmitter converts physical pressure parameters (liquid, gas, or steam) into standard electrical signals (4-20mA DC, etc.) for measurement, indication, and process control[reference:0][reference:1]. Our product portfolio includes capacitance pressure transmitters, silicon resonant pressure transmitters, absolute pressure transmitters, gauge pressure transmitters, and differential pressure transmitters. All products comply with GB/T 17614, IEC 60770, GB3836 and project-specific standards, with HART, BRAIN, FOUNDATION Fieldbus, and PROFIBUS PA communication protocols available[reference:2][reference:3].
| Parameter | Specification Range |
|---|---|
| Standards | GB/T 17614, IEC 60770, GB3836 (Explosion-proof), IECEx, ATEX[reference:4][reference:5] |
| Pressure Types | Gauge Pressure (GP) / Absolute Pressure (AP) / Differential Pressure (DP) / Sealed Gauge[reference:6] |
| Measurement Range | 0~0.1kPa to 0~50MPa (custom ranges available)[reference:7][reference:8] |
| Accuracy | ±0.1% FS / ±0.2% FS / ±0.5% FS[reference:9][reference:10] |
| Output Signal | 4-20mA DC (two-wire) / 1-5V / 0-5V / 0-10V[reference:11][reference:12] |
| Communication Protocol | HART / BRAIN / FOUNDATION Fieldbus / PROFIBUS PA[reference:13][reference:14] |
| Power Supply | 10.5~42V DC (Standard) / 10.5~30V DC (Intrinsic Safety)[reference:15] |
| Sensing Element | Capacitance / Silicon Resonant / Diffusion Silicon / Strain Gauge[reference:16][reference:17] |
| Isolation Diaphragm Material | 316L SS / Hastelloy C-276 / Monel / Tantalum[reference:18][reference:19] |
| Process Connection Material | 316L SS / Hastelloy C-276[reference:20] |
| Process Connection | M20×1.5 / 1/2-14NPT / Flange connection[reference:21] |
| Ambient Temperature | -40°C ~ +85°C (Standard) / -30°C ~ +80°C (with display)[reference:22] |
| Process Temperature | -40°C ~ +120°C (Standard) / Up to +191°C (High-temp version)[reference:23][reference:24] |
| Overpressure Limit | Up to 75MPa (varies by model)[reference:25] |
| Ingress Protection | IP67 / NEMA 4X[reference:26] |
| Explosion-proof Certification | Ex d II C T6 Gb / Ex ia II C T6 / FM / CSA / ATEX / IECEx[reference:27][reference:28] |
| Display | 0-100% Linear Indicator / Digital LCD Display (optional)[reference:29] |
| Application | Power plants, petrochemical, oil & gas, EPC projects, water treatment, HVAC, industrial automation[reference:30] |
* Custom specifications are available upon request for EPC project tenders.
| Model | Type | Measurement Range | Key Feature |
|---|---|---|---|
| 1151GP | Gauge Pressure | 0-0.1kPa ~ 0-40MPa[reference:31] | Capacitance type, can be migrated to negative pressure[reference:32] |
| 1151AP | Absolute Pressure | 0-6kPa ~ 0-10MPa[reference:33] | For degassing systems, distillation towers[reference:34] |
| 3351GP | Gauge Pressure | 0-0.1kPa ~ 0-40MPa[reference:35] | Capacitance type, min pressure 1kPa[reference:36] |
| 3151DP | Differential Pressure | Custom range | For liquid level, density, flow measurement[reference:37] |
| Model | Type | Measurement Range | Key Feature |
|---|---|---|---|
| 510A | Absolute Pressure | 0-200kPa ~ 0-50MPa[reference:38] | Single crystal silicon resonant sensor, ±0.1% accuracy[reference:39][reference:40] |
| 530A | Gauge Pressure | -100kPa ~ 0-50MPa[reference:41] | Single crystal silicon resonant sensor, ±0.1% accuracy[reference:42][reference:43] |
| Model | Type | Key Feature |
|---|---|---|
| 3051H | High-Temperature | Process temp up to 191°C, 0.25% accuracy, 100:1 turndown[reference:44] |
| 438W / 438N | Diaphragm Seal | Remote diaphragm seal for corrosive/viscous media, HART communication[reference:45] |
| Code | Meaning |
|---|---|
| GP | Gauge Pressure (表压)[reference:46] |
| AP | Absolute Pressure (绝压)[reference:47] |
| DP | Differential Pressure (差压) |
| N | Analog Output (4-20mA)[reference:48] |
| G | Smart Type (4-20mA)[reference:49] |
| S | Smart Type with HART Protocol[reference:50] |
| Q1 | Accuracy ±0.2% FS[reference:51] |
| Q2 | Accuracy ±0.5% FS[reference:52] |
| L1 | M20×1.5 Female Thread[reference:53] |
| L2 | 1/2-14NPT Female Thread[reference:54] |
| d | Flameproof (Ex d II C T5)[reference:55] |
| i | Intrinsic Safety (Ex ia II C T6)[reference:56] |
Q1: What is a pressure transmitter?
A: A pressure transmitter (压力变送器) is an instrument that converts physical pressure parameters (liquid, gas, or steam) into standard electrical signals (such as 4-20mA DC) for measurement, indication, and process control[reference:57][reference:58]. It consists of a pressure sensor, measurement circuit, and process connection, and is one of the most commonly used sensors in industrial automation[reference:59].
Q2: What are the main types of pressure transmitters?
A: The main types include: Capacitance pressure transmitters (1151GP, 3351GP) — most common, high accuracy; Silicon resonant pressure transmitters (510A, 530A) — single crystal silicon sensor, excellent long-term stability[reference:60]; Diffusion silicon pressure transmitters — cost-effective; Strain gauge pressure transmitters — for general applications[reference:61].
Q3: What is the difference between gauge pressure (GP) and absolute pressure (AP)?
A: Gauge pressure (GP) is measured relative to atmospheric pressure — it shows the pressure above or below the ambient atmospheric pressure[reference:62]. Absolute pressure (AP) is measured relative to absolute vacuum — it includes atmospheric pressure[reference:63]. AP transmitters are used in degassing systems, distillation towers, evaporators, and crystallizers where vacuum conditions exist[reference:64].
Q4: What standards do your pressure transmitters comply with?
A: Our pressure transmitters are manufactured in compliance with GB/T 17614 (Chinese national standard for industrial process control transmitters)[reference:65], IEC 60770 (international standard for transmitters), GB3836 (explosion-proof standard)[reference:66], and IECEx and ATEX international explosion-proof standards[reference:67].
Q5: What output signals and communication protocols are available?
A: Standard output is 4-20mA DC two-wire signal[reference:68]. Communication protocols include: HART (most common, enables two-way digital communication)[reference:69], BRAIN[reference:70], FOUNDATION Fieldbus[reference:71], and PROFIBUS PA[reference:72]. Voltage outputs (1-5V, 0-5V, 0-10V) are also available[reference:73].
Q6: What is the difference between 1151GP and 3351GP pressure transmitters?
A: Both are capacitance-type gauge pressure transmitters. 1151GP is the classic model widely used in power plants and petrochemical applications[reference:74]. 3351GP is an upgraded version with improved performance and the same measurement range (0-0.1kPa ~ 0-40MPa)[reference:75]. Both can be configured as negative pressure transmitters through migration.
Q7: What is the 510A/530A silicon resonant pressure transmitter?
A: The 510A (absolute pressure) and 530A (gauge pressure) use single crystal silicon resonant sensor technology[reference:76]. Key advantages: No hysteresis with pressure or temperature changes[reference:77]; Excellent long-term stability; ±0.1% accuracy[reference:78]; Compact, lightweight design (50% weight reduction)[reference:79]; Supports BRAIN, HART, FOUNDATION Fieldbus, and PROFIBUS PA protocols[reference:80].
Q8: What is the accuracy of your pressure transmitters?
A: We offer multiple accuracy grades: ±0.1% FS — premium grade for critical applications (510A/530A series)[reference:81]; ±0.2% FS (Q1) — high precision for most industrial applications[reference:82]; ±0.5% FS (Q2) — standard grade for general applications[reference:83].
Q9: What is the measurement range of pressure transmitters?
A: Measurement ranges cover: Low pressure: 0-0.1kPa ~ 0-1kPa[reference:84]; Medium pressure: 0-6kPa ~ 0-2.5MPa[reference:85]; High pressure: 0-4MPa ~ 0-50MPa[reference:86][reference:87]. Negative pressure (vacuum) measurement is also available[reference:88].
Q10: What is the temperature range for pressure transmitters?
A: Ambient temperature: -40°C ~ +85°C (standard) / -30°C ~ +80°C (with display)[reference:89]. Process temperature: -40°C ~ +120°C (standard)[reference:90]. High-temperature version (3051H): up to +191°C without remote seals[reference:91].
Q11: What isolation diaphragm materials are available?
A: We offer multiple isolation diaphragm materials for different media compatibility: 316L Stainless Steel — standard for most applications[reference:92]; Hastelloy C-276 — for corrosive media[reference:93]; Monel — for acidic environments[reference:94]; Tantalum — for highly corrosive applications[reference:95].
Q12: Do you offer explosion-proof pressure transmitters?
A: Yes. We offer both flameproof (Ex d) and intrinsic safety (Ex ia) explosion-proof versions[reference:96]. Common certification marks: Ex d II C T6 Gb (flameproof)[reference:97] and Ex ia II C T6 (intrinsic safety)[reference:98]. We also offer FM, CSA, ATEX, and IECEx certifications for international projects[reference:99][reference:100].
Q13: What is the ingress protection (IP) rating?
A: Our pressure transmitters offer IP67 protection[reference:101], meaning they are dust-tight and can withstand immersion in water up to 1 meter for 30 minutes. NEMA 4X rating is also available for outdoor applications[reference:102].
Q14: What is the overpressure limit for pressure transmitters?
A: Overpressure limits vary by model and range: up to 4MPa for low-range models; up to 20MPa for medium-range models; up to 75MPa for high-range models[reference:103]. This ensures the transmitter can withstand accidental pressure spikes without damage.
Q15: What is the difference between a pressure transmitter and a pressure sensor?
A: A pressure sensor is the sensing element that detects pressure and produces a raw signal. A pressure transmitter is a complete instrument that includes the sensor, signal conditioning circuit, and standardized output (4-20mA, etc.)[reference:104]. All pressure transmitters contain a pressure sensor, but not all pressure sensors are transmitters.
Q16: What are the typical applications of pressure transmitters?
A: Pressure transmitters are widely used in: Power plants — boiler steam pressure, turbine inlet pressure[reference:105]; Petrochemical — reactor pressure, pipeline monitoring[reference:106]; Oil & gas — wellhead pressure, flow measurement; Water treatment — pump pressure, filter differential pressure; EPC projects — instrumentation and control systems; HVAC — air and water pressure monitoring[reference:107].
Q17: How do I select the right pressure transmitter for my application?
A: Key selection factors include: (1) Pressure type — gauge, absolute, or differential; (2) Measurement range — must cover your operating pressure with safety margin; (3) Accuracy requirement — 0.1%, 0.2%, or 0.5% FS; (4) Output signal — 4-20mA, HART, Fieldbus, etc.; (5) Process connection — thread type and size; (6) Media compatibility — isolation diaphragm material; (7) Temperature — ambient and process temperature; (8) Hazardous area classification — explosion-proof certification if required[reference:108].
Q18: What tests are performed on pressure transmitters before delivery?
A: We conduct comprehensive quality tests including: (1) Accuracy test — verifying linearity, hysteresis, and repeatability[reference:109]; (2) Insulation resistance test; (3) Dielectric strength test; (4) Pressure test — verifying overpressure capability; (5) Temperature test — verifying temperature compensation; (6) Long-term stability test; and (7) Explosion-proof test for hazardous area models.
Q19: Do you support EPC projects with technical documentation?
A: Yes. We provide full technical support for EPC projects, including datasheets, calibration certificates, type test reports, factory acceptance tests (FAT), material traceability documentation, and custom configuration based on project instrumentation schedules and control system requirements. We are a trusted partner for global EPC contractors in power, petrochemical, and industrial sectors.
Q20: Can you provide custom pressure transmitter configurations?
A: Yes. We offer fully customized pressure transmitter solutions including custom measurement ranges, output signals, communication protocols, process connections, isolation diaphragm materials, temperature ratings, explosion-proof certifications, and special markings. Our engineering team works closely with EPC contractors to develop transmitters that meet specific project technical requirements and control system compatibility.
Send your project specification, instrumentation schedule, or pressure measurement requirements. Our engineering team will reply with a customized solution, BOM & datasheet within 24 hours.
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Founded in 1974, Anhui Tiankang Group is a cross-industry and diversified conglomerate. Its core products cover instruments and meters, optical and e...
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