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U501-B Pulse sensor


U501-B Pulse sensor

This incremental shaft encoder has been designed for heavy-duty application, especially for use in petroleum & diesel dispensing environments where potentially explosive atmospheres can be expected. It features a rugged and compact construction as well as a wide selection of mechanical and electronic variations.


Housing: Die cast aluminum alloy

Bearings: Self-lubricating sintered bronze

Features :

A high advantage in reliability and adaptability.

A large selection of shaft couplings, including couplings with built-in backlash clutch facility.

Standard sealing screws.

The fuel resistant cable can be customized regarding length.

Suit the Bennett SB-100 meter and other meters whose pulse per circle is 60.

100% EX approved and tested.


Power supply: 5 VDC, fixed or variable

Current Consumption: Standard 10 to 30 mA, max 90mA

Number of Channels: 2

Number of pulses: 60 ppr

Output Signal: Square wave duty cycle 50%+10%.

Phase Shift: 2 channels 90° (25% +5%)

Output Stage: NPN

Output Current: Max. 30mA

Hysteresis: Min. 0.2°

Output freq. Min. 1000Hz

Temperature range: Working -40 to 70degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable


Color Channel plug

Red +5V 2

Green CH1 3

Blue CH2 4

Yellow 0V 5


Cross Weight Dimension

340g/case of 1 186x157x29mm/case of 1


The shaft encoder has been tested and granted Ex and EMC approval.The Ex-approval is EX d IIA T3.Ex certificate number is CE991209.

Ordering Specifications:

Product ID Product name

U501-B pulse sensor


The products should be used in compliance with applicable country, province and local Laws and regulations. Products selection should be based on physical Specifications and limitations and compatibility with the environmentand materials to be handled. HONGYANG makes no warranty of fitness for a particular use. All illustrations and Specifications in this literature are based on the latest products information available at the time of publication,HONGYANG reserves the right to make changes at any time in price, materials. Specifications and models and to discontinue models without notice or obligation

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technical archives

    C/DC convert type switch power is universally adopted in fuel dispenser. Diagram 3-13: Structural sketch map of liner voltage stabilizing power Diagram 3-14: Structural sketch map of switch stable voltage power adopted DC/DC converter Diagram 3-15: Structural sketch map of switch voltage stabilizing power adopted pulse transformer As an electronic component in fuel dispenser, stable voltage power is easily failed and possibly leads to whole trouble of fuel dispenser once appear doesn’t work. Generally, liner voltage stabilizing power adopts 78 series special voltage stabilizing integrated circuit, such as 7805 and 7812, simple design and convenient maintenance. In Diagram 3-16, a popular liner voltage stabilizing power circuit of fuel dispenser is illustrated. Switch power supply adopted pulse t fuel dispenser ransformer will not introduced here, reference with relevant boos when necessary. Diagram 3-16: Circuit diagram of liner voltage stabilizing power These integrated circuits of LM2576, LM4962 AND MC34063A are widely adopted in DC/DC transformer power supply. Intrinsic safety voltage stabilizing power supply in fuel dispenser This kind of direct current is able to employ in flammable and combustible environment only when mounted safety barrier. It also called intrinsic safety voltage stabilizing power supply illustrated in Diagram 3-18. Explosion-proof power supply is only used in explosion-proof box or an atmosphere without explosive gas, including its associated circuit. It is allowed to employ intrinsic safety power in explosive atmosphere, but must in explosion-proof box or an environment without explosive gas. However, its associated circuit is permitted to use in explosive gas atmosphere if meet requirements concerned. The major difference between intrinsic safety power and explosion-proof power is whether install safety barrier. Diagram 3-17: Voltage stabilizing power circuit of DC/DC convertor Diagram 3-18: Sketch map of intrinsic safety power The function of setting a safety barrier i fuel dispenser fuel dispenser

technical specification

     technical committees. Each member body interested in a subject for which a technical committee has been  established has the right to be represented on that committee. International organizations governmental and  non-governmental in liaison with ISO also take part in the work. ISO collaborates closely with the International  Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.  International Standards are drafted in accordance with the rules given in the ISOIEC Directives Part 2.  The main task of technical committees is to prepare International Standards. Draft International Standards  adopted by the technical committees are circulated to the member bodies for voting. Publication as an  International Standard requires approval by at least 75 % of the membe fuel dispenser r bodies casting a vote.  Attention is drawn to the possibility that some of the elements of this document may be the subject of patent  rights. ISO shall not be held responsible for identifying any or all such patent rights.  ISO 9000 was prepared by Technical Committee ISOTC 176 Quality management and quality assurance  Subcommittee SC 1 Concepts and terminology.  This third edition cancels and replaces the second edition (ISO 9000:2000). It includes the changes accepted in  the Draft Amendment ISODAM 9000:2004.  Annex A includes concept diagrams that provide a graphical representation of the relationships between terms  in specific fields relative to quality management systems.  iv ? ISO 2005 All rights reserved   ISO 9000:2005(E)  Introduction  0.1 General  The ISO 9000 family of standards listed below has been developed to assist organizations of all types and  sizes to implement and operate effective quality management systems.   ISO 9000 desc fuel dispenser fuel dispenser

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    ype, a variant of the wet-collodion process that was popular in the 1860s owing to its cheapness and durability (the images were printed on metal sheets, typically iron). The first, by an unknown photographer, is from the Civil War era. Within the gold-tone frame, the neatly dressed subject is clasping a book—a remarkable statement for the age. A companion portrait, made by Deborah Luster in 2000 and pictured above, shows a female prisoner in Louisiana, where Ms Luster lives. Despite their physical smallness, both the old and the new tintypes radiate an astonishing grace and dignity. Some hyper-purists in alternative photography believe that their subjects should dress up in period costume. This sounds kitsch, though Michael Gray, a British photographer, has produced a surprisingly soft and lovely p fuel dispenser rint of three people outside the medieval Wiltshire abbey that once was home to the man who discovered how to use negatives to produce positive prints, William Henry Fox Talbot. More often, modern photographers like to use the old processes in a jarring way. Gum bichromate prints were favoured by early 20th-century pictorialists because they could be coated with pigment for a painterly effect; Adam Lubroth, a contemporary American photographer, uses the technique to create brightly-coloured images of people sitting grumpily in their cars at red lights. Another example is platinum prints. These have long been associated with high-class occasions because they were expensive to produce. Also they showed images in clear detail, hence the elegant print of a woman gazing down upon the World s Columbian Exposition in Chicago in 1893. But Byron Brauchli has turned the idea of elegance on its head, and used this fine form (albeit with palladium, a close platinum substitute) to depict illegal logging in Mexico in 1993, with billowing smoke and trees shown in sharp relief. For all this back-to-our-heritage zeal, one of the show s most notable aspects is how new technology enhances the old forms—or fuel dispenser fuel dispenser