Product Description: Lutron DT-2238 Tachometer (Photo/Contact)

Lutron DT-2238 Tachometer (Photo/Contact) is a high-quality digital tachometer designed for accurate measurement of rotational speed, RPM, and surface speed in industrial, mechanical, engineering, laboratory, and maintenance applications. This versatile instrument combines photo tachometer and contact tachometer functions in one compact device, providing a practical solution for measuring the speed of rotating machinery and moving surfaces.

The Lutron DT-2238 Tachometer (Photo/Contact) offers a wide measurement range and supports RPM, m/min, and ft/min measurements. Its high-visibility 5-digit LCD provides clear readings, while the built-in memory function automatically stores the last, maximum, and minimum measured values for convenient retrieval.

Designed with an exclusive one-chip microcomputer LSI circuit and a quartz crystal time base, the Lutron DT-2238 Tachometer provides fast sampling and high-accuracy measurement. Its durable ABS plastic housing, ergonomic design, and lightweight construction make it suitable for comfortable handheld operation in different working environments.

Specifications of Lutron DT-2238 Tachometer (Photo/Contact)

• Product Name: Lutron DT-2238 Tachometer (Photo/Contact)
• Model: DT-2238
• Product Type: Digital Photo / Contact Tachometer
• Display: 5 Digits, 10 mm (0.4″) LCD with Function Annunciation
• Photo Tachometer Range: 5 to 99,999 RPM
• Contact Tachometer Range: 0.5 to 19,999 RPM
• Surface Speed Range: 0.05 to 1,999.9 m/min
• Surface Speed Range: 0.2 to 6,560 ft/min
• RPM Resolution: 0.1 RPM below 1,000 RPM; 1 RPM at 1,000 RPM or above
• m/min Resolution: 0.01 m/min below 100 m/min; 0.1 m/min at 100 m/min or above
• ft/min Resolution: 0.1 ft/min below 1,000 ft/min; 1 ft/min at 1,000 ft/min or above
• RPM Accuracy: ±(0.05% + 1 digit)
• Surface Speed Accuracy: ±(2% + 1 digit)
• Time Base: Quartz Crystal, 4.194 MHz
• Circuit: One-Chip Microcomputer LSI Circuit
• Memory: Last, Maximum, Minimum Values
• Operating Temperature: 0–50°C (32–122°F)
• Operating Humidity: <80% R.H.
• Power Consumption – Photo Type: Approx. DC 153 mA
• Power Consumption – Contact Type: Approx. DC 10 mA
• Dimensions: 195 × 61 × 38.5 mm
• Weight: 280 g (including battery)
• Brand: Lutron
• Origin: Taiwan

Lutron DT-2238 Tachometer (Photo/Contact) for RPM Measurement

The Lutron DT-2238 Tachometer (Photo/Contact) combines photo and contact tachometer functions in a single digital measuring instrument. The photo tachometer function enables non-contact RPM measurement, making it useful for rotating shafts, motors, fans, pulleys, and other moving machinery where direct contact may not be convenient.

The contact tachometer function allows direct measurement of rotational speed when physical contact with the rotating component is required. With a contact measurement range of 0.5 to 19,999 RPM, the instrument can be used for a wide variety of low- and high-speed rotating equipment.

With its dual-function design, the Lutron DT-2238 Tachometer provides flexibility for technicians, engineers, laboratory professionals, maintenance personnel, and industrial users who require reliable rotational speed measurement.

Wide Measurement Range and Surface Speed Measurement

A key advantage of the Lutron DT-2238 Tachometer (Photo/Contact) is its broad measurement capability. The photo tachometer measures from 5 to 99,999 RPM, while the contact tachometer measures from 0.5 to 19,999 RPM.

In addition to rotational speed, the instrument can measure surface speed in both metric and imperial units:

• m/min: 0.05 to 1,999.9 m/min
• ft/min: 0.2 to 6,560 ft/min

This makes the Lutron DT-2238 Tachometer suitable for measuring the speed of rotating and moving surfaces in machinery, production equipment, conveyors, rollers, motors, and other mechanical systems.

High-Visibility LCD Display and Memory Function

The Lutron DT-2238 Tachometer (Photo/Contact) features a 5-digit LCD with 10 mm (0.4″) high digits, allowing measured values to be viewed clearly during operation.

The tachometer also includes a convenient memory function that automatically stores:

• Last measured value
• Maximum measured value
• Minimum measured value

These stored readings can be retrieved using the Memory Call Button, making it easier to compare measurements and monitor machine performance during inspection and maintenance work.

High-Accuracy Lutron DT-2238 Tachometer

The Lutron DT-2238 Tachometer uses an exclusive one-chip microcomputer LSI circuit together with a 4.194 MHz quartz crystal time base. This electronic design supports fast sampling and reliable measurement performance.

For RPM measurements, the specified accuracy is ±(0.05% + 1 digit). This makes the Lutron DT-2238 Tachometer (Photo/Contact) suitable for applications where accurate rotational speed measurement is important.

The instrument provides a resolution of 0.1 RPM below 1,000 RPM, while measurements of 1,000 RPM and above are displayed with 1 RPM resolution.

Durable and Ergonomic Design

The Lutron DT-2238 Tachometer (Photo/Contact) is built with a strong and lightweight ABS plastic housing designed for regular laboratory, workshop, industrial, and maintenance use.

Its ergonomic housing is designed for comfortable operation in either hand. With dimensions of approximately 195 × 61 × 38.5 mm and a weight of only 280 g including the battery, the instrument is convenient to carry and use during field inspections and machine maintenance.

The durable construction and low-maintenance design make the Lutron DT-2238 Tachometer a practical choice for users who need a portable digital tachometer for regular speed measurement.

Applications of Lutron DT-2238 Tachometer (Photo/Contact)

The Lutron DT-2238 Tachometer (Photo/Contact) can be used in a wide range of applications, including:

• Motor RPM measurement
• Machine speed measurement
• Rotational speed testing
• Fan and blower speed measurement
• Pump RPM measurement
• Conveyor speed measurement
• Roller speed measurement
• Industrial machinery inspection
• Mechanical equipment maintenance
• Production line monitoring
• Engineering applications
• Laboratory testing
• Workshop applications
• Preventive maintenance
• Equipment troubleshooting
• Quality control
• Research and development
• Manufacturing industries
• Automotive and mechanical applications

Why Choose Lutron DT-2238 Tachometer (Photo/Contact)?

• Dual Photo and Contact Tachometer functionality
• Wide RPM measurement range
• Photo measurement up to 99,999 RPM
• Contact measurement from 0.5 to 19,999 RPM
• Measures surface speed in m/min and ft/min
• High-visibility 5-digit LCD
• Automatic memory for Last, Max., and Min. values
• High RPM measurement accuracy of ±(0.05% + 1 digit)
• Quartz crystal time base
• One-chip microcomputer LSI circuit
• Fast sampling and reliable measurement
• Durable ABS plastic housing
• Ergonomic handheld design
• Lightweight and portable construction
• Suitable for industrial, laboratory, engineering, and maintenance applications
• Model: DT-2238
• Brand: Lutron
• Origin: Taiwan

Frequently Asked Questions (FAQ)

1. What is the Lutron DT-2238 Tachometer (Photo/Contact)?

The Lutron DT-2238 Tachometer (Photo/Contact) is a digital tachometer that combines photo and contact tachometer functions for measuring RPM, rotational speed, and surface speed.

2. What is the photo tachometer range of Lutron DT-2238?

The photo tachometer measures rotational speed from 5 to 99,999 RPM.

3. What is the contact tachometer range of Lutron DT-2238?

The contact tachometer has a measurement range of 0.5 to 19,999 RPM.

4. Can the Lutron DT-2238 Tachometer measure surface speed?

Yes. The Lutron DT-2238 Tachometer can measure surface speed from 0.05 to 1,999.9 m/min and 0.2 to 6,560 ft/min.

5. What is the accuracy of the Lutron DT-2238 Tachometer?

For RPM measurement, the specified accuracy is ±(0.05% + 1 digit). Surface speed accuracy is ±(2% + 1 digit).

6. Does the Lutron DT-2238 have a memory function?

Yes. The instrument stores the Last, Maximum, and Minimum measured values, which can be retrieved using the Memory Call Button.

7. What type of display does the Lutron DT-2238 have?

The Lutron DT-2238 Tachometer features a 5-digit, 10 mm (0.4″) LCD with function annunciation.

8. Is the Lutron DT-2238 Tachometer suitable for industrial applications?

Yes. It is suitable for various industrial, mechanical, engineering, maintenance, production, and machine inspection applications.

9. What is the operating temperature of Lutron DT-2238?

The operating temperature range is 0 to 50°C (32 to 122°F).

10. What is the weight of the Lutron DT-2238 Tachometer?

The instrument weighs approximately 280 g, including the battery.

11. What is the model number of this tachometer?

The model number is DT-2238.

12. What is the brand of the Lutron DT-2238 Tachometer?

The brand is Lutron.

13. What is the origin of the Lutron DT-2238 Tachometer?

The stated origin of the Lutron DT-2238 Tachometer is Taiwan.

14. What can the Lutron DT-2238 Tachometer measure?

It can measure RPM, rotational speed, and surface speed of rotating machinery and moving surfaces.

15. Is Lutron DT-2238 a digital tachometer?

Yes. The Lutron DT-2238 Tachometer (Photo/Contact) is a digital photo/contact tachometer with an LCD and electronic memory function.

Conclusion

Lutron DT-2238 Tachometer (Photo/Contact) is a versatile digital measuring instrument designed for RPM measurement, rotational speed testing, and surface speed measurement. Its combination of photo and contact tachometer functions provides flexibility for measuring different types of rotating machinery and moving surfaces.

With a photo tachometer range of 5 to 99,999 RPM, a contact tachometer range of 0.5 to 19,999 RPM, surface speed measurement in m/min and ft/min, a high-visibility LCD, memory function, quartz crystal time base, and durable ergonomic housing, the Lutron DT-2238 Tachometer is suitable for industrial, laboratory, engineering, maintenance, manufacturing, and mechanical applications.

Model: DT-2238 | Brand: Lutron | Origin: Taiwan