H21B1

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Sensing Distance:	0.118" (3mm)
Sensing Method:	Transmissive
Output Configuration:	Photodarlington
Current - DC Forward (If) (Max):	50mA
Current - Collector (Ic) (Max):	40mA
Voltage - Collector Emitter Breakdown (Max):	30V
Response Time:	7µs, 45µs
Operating Temperature:	-55°C ~ 100°C
Mounting Type:	Through Hole, Flange
Package / Case:	Slotted, PC Pins
Type:	Unamplified

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H21B1 Application Field and Working Principle

Optical sensors are the most commonly used type of sensor used for a variety of applications. Photointerrupters are one of the main categories of such sensors, and the H21B1 slot type sensor is one of the most popular products in this field.The H21B1 sensor is a type of photointerrupter consisting of a light emitting element and a light-receiving element, separated by a slit or slot. When light from the light emitting element is cut off by an object, the output of the light receiving element varies. This output is then processed by the sensor’s transistor output to give a signal that can be used for detecting the presence or absence of an object in front of the slot.The H21B1 is especially suited for applications requiring a reliable and accurate detection of an object, such as in industrial automation, safety monitoring, and contactless switches. It is also used for automatic counting and positioning applications as well as for detecting foreign bodies within machines. The main advantage of the H21B1 over other photointerrupters is its small size. By using miniaturized components and employing advanced optical technology, the H21B1 is able to measure objects as small as 2mm or 1mm in diameter. This makes it highly suitable for tight spaces and limited areas where other sensors cannot operate.The H21B1 utilizes a simple transistor output design which allows it to be connected directly to a microcontroller or digital logic circuit. This makes the sensor highly versatile and suitable for use in many different applications. Its wide operating voltage range makes the H21B1 suitable for use with a wide variety of power sources.The H21B1 can be used in both single-channel and dual-channel configurations. In single-channel configurations, the sensor\'s transistor output is connected directly to the logic input of the microcontroller, and is used to detect objects passing through the slot. In dual-channel configurations, the output from the H21B1 is connected to two separate logic signals on the microcontroller. This allows the sensor to detect objects passing through the slot in two directions, and can be used for applications such as counting objects, controlling motor direction, or indexing positions.The H21B1 slot type photointerrupter requires no external power supply, making it easy to install and integrate into existing systems. It is also highly reliable and is designed to meet or exceed safety and quality standards.Optical sensors, particularly photointerrupters, are very important components in many applications related to industrial automation and safety. The H21B1 slot type photointerrupter offers the user a reliable and accurate way of detecting objects, even in tight spaces or where space is limited. With its small size and wide operating voltage range, the H21B1 is suitable for use in many applications. The simple transistor output design makes the H21B1 easy to connect to existing systems, and it can also be used for dual channel configurations when multiple inputs or outputs are required.

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