Product catalog
- HM10 High - accuracy Pressure Sensor
- HM20 General - type Pressure Transducer Description
- HM22 High - accuracy Pressure Transducer
- HM23 Special Pressure Transducer for Air Conditioner, Refrigerating and Compressor
- HM23Y Special Pressure Transducer for Oilfield and Mining Well
- HM24 Economical Pressure Sensor and Transducer
- HM25 Industrial - type Pressure Transducer
- HM26 Ceramic Capacitor Pressure Transducer
- HM27 Vacuum / Absolute Pressure Transducer
- HM28 Sapphire Pressure Transducer
- HM29 Digital • Intellectual Pressure / Differential Pressure Transducer
- HM50 Anti - corrosive Pressure Transducer
- HM60 Anti - explosive Pressure Transducer
- HM70 Hygienic Flat - membrane Pressure Transducer
- HM80 High - temperature Pressure Transducer
- HM90 High - frequency Dynamic Pressure Transducer
- HM91 Micro Pressure Sensor and Transducer
Contact Us
南京宏沐科技有限公司
销售部地址：南京市高铁南站南广场
电话：400-063-9658
手机：18951963348同微信号
传真：025-52150140
邮箱：njhongmu@hmsensor.com
HM21R Anti - corrosive Liquid Level Transducer
Description
HM21R anti - corrosive liquid level transducer is a new liquid level - measuring series product specially measuring sea water level and viscous and corrosive liquid level using the state–of–the–art technology of German HELM. It adopts German HELM made titanium alloy large flat membrane sensor as well as advanced manufacturing and encapsulating technology, supported with high–accuracy electronic elements, to great enhance service life and comprehensive performance of the product. It adopts internationally state–of–the–art ceramic capacitor sensor and adopts dry pressure measuring technology with intermediate liquid, thick membrane electronic technology, surface mount technology (SMT) and PFM signal transferring technology to fully play a role of technical advantages for ceramic capacitor sensor, with strong anti–corrosive, anti–overloading, and anti–impact capacity, high stability, and very high accuracy of measurement. This series of product may widely used for such corrosive and viscous liquid level measurement and control field as sea water level etc.
Features of Product
☆ Strong corrosive resistance;
☆ Large flat membrane design and good clogging resistance;
☆ Wide range of measurement, from micro pressure 0.5m to high pressure 200m;
☆ Strong anti–overloading and anti–impact capacity, with over pressure up to several dozens times to several hundred times of scale;
☆ Adoption of imported ceramic capacitor sensor, with strong signal output, high comprehensive accuracy, and good stability;
☆ Small temperature drifting due to without intermediate liquid for measuring element
Application of Product
Details
Measuring range | 0 ~ 0.5m…200m | |||
Overloading capacity | Three times of maximum rated pressure | |||
Medium to be measured | The medium compatible with Al2O3 | |||
Overall accuracy | ± 0.1% FS | ± 0.25% FS | ± 0.4% FS | ± 1% FS |
Long-term stability | Typical: ± 0.1% FS / year | Maximum: ± 0.2% FS | ||
Range of operating temperature | Integrated: - 20℃～70℃ | Split (Inserted): - 20℃～80℃ | ||
Range of compensating temperature | Integrated: - 10℃～55℃ | Split (Inserted): - 10℃～70℃ | ||
Zero point temperature drifting | Typical: ± 0.02% FS / ℃ | Maximum: ± 0.05% FS / ℃ | ||
Sensitivity temperature drifting | Typical: ± 0.02% FS / ℃ | Maximum: ± 0.05% FS / ℃ | ||
Range of power supplying | 12 ~ 36V DC( generally 24V DC) | |||
Signal output | 4～20mA / 1 - 5V DC / 0～5V DC | |||
Load resistance | ≤(U - 12) / 0.02Ω | |||
Material of structure | Enclosure: 316L (optional) | Membrane: Titanium alloy | ||
Sealing: Fluo–silicon rubber | Cable: ￠7.2mm PVC, special | |||
Insulation resistance | 100MΩ， 500V DC | |||
Protection degree | Enclosure protection degree IP68 |
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Safe explosion - proof | Ex ia II CT5 | |||
Response time | ≤ 2ms | |||
Resolution | Infinite small (theoretical) 1 / 100000 (general) | |||
Weight | Approx. 250g | |||
Product selection
HM21R | Anti - corrosive Liquid Level Transducer |
| Guideline of Selection | Anti - corrosive Liquid Level Transducer | ||||||||||
| Range | Measuring Range | ||||||||||||
| 0 ~ X m or 0 ~ X KPa | |||||||||||||
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| Code | Structural form (maximum range of operating scale) | ||||||||||
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| C1 | Integrated: (0 ~ 200m) | ||||||||||
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| C2 | Split: (0 ~ 10m) | ||||||||||
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| C3 | Inserted; (0 ~ 4m) | ||||||||||
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| Code | Overall accuracy (linear + repeatability + lagging) | ||||||||
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| 0 | ± 0.1% FS | ||||||||
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| 1 | ± 0.4% FS | ||||||||
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| 2 | ± 0.25% FS | ||||||||
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| 3 | ± 0.1% FS | ||||||||
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| Code | Signal Output (standard power supply of energization | ||||||
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| A1 | 4 ~ 20mA(12 ~ 36V DC) | ||||||
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| V1 | 1 ~ 5V(12 ~ 36V DC) | ||||||
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| V2 | 0 ~ 5V DC(12 ~ 36V DC) | ||||||
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| Code | Additional functions | ||||
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| F1 | G 1 1 / 2 external thread (split and inserted) | ||||
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| F2 | DN 20 flange (split and inserted) | ||||
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| F0 | Special | ||||
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| E | Intrinsically safe explosion - proof type Ex ia II CT5 | ||||
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| F | Lightning type | ||||
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HM21R ( 0 ~ 10m) | — C1 | — 1 | — A1 | — E | Anti - corrosive Liquid Level Transducer | |||||||||
Tips of Selection
The medium to be measured shall be compatible with the material contacting with the product. Meanwhile, it is needed to be indicated with density of the medium to be measured under the measuring status (except for water). The F1, F2, and F0 shown as the additional functions are only suitable for split–type liquid level transducer and inserted–type liquid level transducer. The code E, an additional functional code for selection, and intrinsically safe explosion-proof Ex ia II CT5 must be power supplied via safety barrier. The length of cable shall be L = X m + 1m. Please indicate for extension when placing an order. There are two kinds of cable material. The polyurethane is more flexible with good wear resistance, which may be selectively used. Under the condition without special indication, the PVC cables shall be supplied. The corresponding relationship of 1m water column under standard condition ( i.e. 4℃, g = 9.80665 m / s2) shall be 1 mH2O = 0.1kgf / cm2 = 9.8kPa Please contact us in case of the other special requirements and clearly indicate them when placing an order.
