Description
The Lutron DT-2238 is a dual-mode tachometer designed to measure motor and machinery speed using both photo and contact methods. It delivers high-precision rotational speed measurements with ±0.05% accuracy and is ideal for use in industrial, automotive, and maintenance applications. The DT-2238 features a backlit LCD, memory recall, and durable ABS housing for reliable long-term use.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Lutron |
| Category |
Test Equipment |
| Part Number |
DT-2238 |
| Subcategory |
Tachometers |
| Measurement Modes |
Photo Tachometer / Contact Tachometer |
| Photo RPM Range |
5 to 100,000 RPM |
| Contact RPM Range |
0.5 to 19,999 RPM |
| Accuracy |
±(0.05% + 1 digit) |
| Measurement Distance |
Up to 500 mm (photo mode) |
| Display |
Large LCD with backlight |
| Measurement Units |
RPM, RPS |
| Memory Functions |
Last, Max, Min readings recall |
| Power Supply |
4 x AA batteries (included) |
| Battery Life |
Approx. 30 hours continuous use |
| Auto Power Off |
After 60 seconds of inactivity |
| Operating Temperature |
0°C to 50°C (32°F to 122°F) |
| Housing Material |
ABS plastic |
| Dimensions |
Compact ergonomic handheld size |
| Weight |
190 grams (including batteries) |
Information About DT-2238
The DT-2238 is a versatile tachometer in Lutron’s instrumentation lineup, combining photo and contact measurement in a compact handheld design. It can measure speeds from 5 to 100,000 RPM (photo) and 0.5 to 19,999 RPM (contact), offering flexibility for use with rotating equipment in hard-to-reach or hazardous environments. The device includes features like auto power-off, memory for min/max/last readings, and a visible laser light source for safer non-contact measurements. Ideal for field or workshop use, it supports multiple measurement units and ensures accuracy through a microprocessor-based circuit.
Key Features:
- 2-in-1 Tachometer: Combines photo and contact RPM measurement in one device.
- Wide RPM Range: Measures from 5 to 100,000 RPM (photo) and 0.5 to 19,999 RPM (contact).
- High Accuracy: ±0.05% + 1 digit for reliable speed measurements.
- Clear LCD Display: Large backlit screen ensures visibility in dim environments.
- Memory Recall: Stores last, max, and min readings automatically.
- Long Battery Life: Up to 30 hours of continuous use with 4 x AA batteries.
- Auto Power Off: Saves power by shutting down after 60 seconds of inactivity.
- Durable Design: Rugged ABS plastic body for long-term industrial use.
The DT-2238 delivers the reliability and precision required for professional rotational speed diagnostics across industrial and automotive settings.
