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.