The core component of the HPM288 series explosion-proof pressure transmitter is a high-precision, high-stability silicon piezoresistive pressure sensitive element. Its electrical working principle is to form a Wheatstone bridge on a silicon substrate by ion implantation and laser correction. The external pressure acts on the isolation diaphragm of the sensor to cause the diaphragm to displace, and the pressure is transmitted to the silicon substrate through the silicone oil in the diaphragm box, so that two of the four resistors of the Wheatstone bridge have a smaller resistance due to stretching, and the other two have a larger resistance due to compression. The change in the resistance of the bridge arm causes the bridge to lose balance, thus generating a voltage output signal proportional to the pressure.
Product Features
- Explosion-proof marking: Ex db IIC T6 Gb;Ex tb IIIC T80°C Db; Certificate No. CE24.4662
- Aluminum alloy shell, ingress protection IP66
- Field display, support 4-20mADC signal output and other RS485, HART signals
- With polarity reversal protection, overcurrent and overvoltage protection
- Strong anti-jamming, long-term stability
Product Parameters
| Measuring Medium |
Various liquids, gases, and steam compatible with 304 or 316 stainless steels |
| Pressure Range |
-0.1…0~0.01…100MPa |
| Overload |
1.5 times pressure range of full scale |
| Pressure Type |
Gauge, Absolute or Sealed Gauge |
| Supply Voltage |
DC12~28V |
| Output Signal |
DC4~20mA, 0~10/20mA, RS485 or switch signal |
| Allowed Load Resistance |
0~600Ω(DC 24V, including cable's resistance) |
| Accuracy |
±0.5%FS |
| Long-term Stability |
±0.2%FS/year |
| Temperature Coefficient of Zero |
±0.03%FS/ºC(Reference 25ºC) |
| Temperature Coefficient of Full Scale |
±0.03%FS/ºC (Reference 25ºC) |
| Ambient Temperature |
-30~85ºC(normal type); -40~60ºC(explosion-proof type) |
| Working environment humidity |
no more than 90%RH (+25ºC) |
| Explosion-proof marking |
Ex db IIC T6 Gb; Ex tb IIIC T80°C Db
- Zone 1 and Zone 2 places where explosive mixtures formed by mixing flammable gases, steam and air in categories IIA, IIB, IIC, and T1 to T6 groups exist
- In an environment with explosive dust
- In a place without significant shaking and impact vibration
|
| Explosion-proof certificate number |
CE24.4662 |
Dimension (Unit:mm)
Product Structure Diagram
Ordering Guide
| Item NO. |
Type |
|
| HPM288 |
Explosion-Proof Pressure Transmitter |
| |
Code |
Installation method |
|
| AS |
Threaded mounting, seal gauge pressure or absolute pressure |
| G |
Threaded mounting, gauge pressure |
| QP |
Threaded flush diaphragm |
| G-F |
Flange type |
| KP |
Clamp type |
| |
Pressure Range |
Measuring Range |
|
| (0~X)MPa |
Fill out X directly |
| |
Code |
Output Signal |
|
| B1 |
(4~20)mA |
| B2 |
(0~10)mA |
| B3 |
(0~10)V |
| B4 |
(0~5)V |
| B5 |
(1~5)V |
| B6 |
(0.5~4.5)V |
| |
Code |
Process Connection |
|
| P1 |
M20×1.5 |
| P4 |
G1/2 |
| K505 |
1.5-inch clamp |
| K640 |
2-inch clamp |
| F20 |
DN20 flange |
| F25 |
DN25 flange |
| F50 |
DN50 flange |
| |
Code |
Electrical Connection |
|
| C2 |
Cable Gland |
| |
Code |
Structure&Material |
| Diaphragm |
Process Connection |
Housing |
| M1 |
316L |
Stainless steel |
Aluminum Alloy |
| M1A |
316L |
316L |
Aluminum Alloy |
| M2 |
Titanium |
Titanium |
Aluminum Alloy |
| M3 |
Tantalum |
Customized |
Aluminum Alloy |
| M4 |
Ha C |
Customized |
Aluminum Alloy |
| |
Code |
Additional Functions |
| d |
Ex db IIC T6 Gb |
| f |
Ex tb IIIC T80°C Db |
| v |
Fluororubber O-ring (default) |
| j |
Nitrile O-ring |
| D1 |
LED display |
| D2 |
LCD display |
| HPM288 |
AS |
(0~10)MPa |
B1 |
P1 |
C2 |
M1 |
d D2 |
FAQ
1. Q: Are you manufacturer or trading company?
A: We are manufacturer which focuses on sensor for 10 years.
2. Q: What's your quality control system?
A: MC, ISO9001, CE Certificated.
3. Q: What is the warranty of your products?
A: Our warranty time is 18 months after shipment.
4. Q: What is lead time of your product?
A: Normally, our factory lead time is within 10~15 working days for products without customization. You can also check lead time detail with our sales depending on different items.
5. Q: Do you provide customized products?
A: Yes, we can laser mark your logo on products; OEM and ODM customization are welcomed.
6. Q: What is your MOQ?
A: We have no MOQ limit, small quantity order is acceptable.
7. Q: What's the transport?
A: Express such as DHL, FedEx, TNT, UPS for freight prepaid; and we can also use your own courier account to do the freight collect. For more goods we can arrange by air or by Sea.
8. Q: What is your terms of payment ?
A: We could accept T/T, Paypal, WU.
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