SPI Electronic Measuring Probes
- New series of half bridge probes has been designed to make them compatible with most other brands of amplifiers
- Adaptability to other amplifiers is accomplished by a switchable bridge in the connector
- Measuring piston moves on 32 ball bearings and has roller guide for radial stability
- Hard-chrome plated 8 mm dia. stem
- Contact point with 2.5 mm dia. carbide ball and 2.5 mm thread
- Connector with 6-1/2 ft. cable
Specifications:
| Part Number | Model | Measuring Travel | Pre & Post-Travel | Repeatability | Linearity | Measuring Force |
| 31-880-8 | 2940 | ±0.079" | ## | 0.00000078" | 0.3% | 2.11 oz. |
| 31-881-6 | 2922 | ±0.040" | ### | 0.00000078" | 0.3% | 2.11 oz. |
| 31-882-4 | 2921 | ±0.040" | ### | 0.00000078" | 0.3% | 2.82 oz. |
| 31-884-0 | 2928 | ±0.040" | ## | 0.00000078" | 0.3% | 2.11 oz. |
| 31-885-7 | 2970 | ±0.118" | ### | 0.000019" | 0.5% | 2.82 oz. |
## - Pre-travel adjustable to max. 0.043", post-travel adjustable to max. 0.094"
### - Pre-travel factory set to 0.023", post-travel set to 0.094"
30-299-2 - 1 Reduction Bushing 8 mm to 3/8" dia.
