This is an unused accelerometer made by IRD Mechanalysis, model 942, part number E36503. Designed for permanent mounting on machinery and to withstand harsh industrial environments.

• Suitable for use in hazardous locations
• Power:
• 18 to 26 VDC
• 1 to 4 mA constant current diode
• Frequency response: 5 Hz t o2 Khz +- 10% @ 70° F
• Sensitivity: 100 mV/g +- 10% @ 100 Hz
• Magnetic field sensitivity: 100 µg/Gauss
• Output impedence: 100 Ω
• Dynamic range: 0.001-75 g peak
• Traverse respones: 5% average
• Grounding: Case isolated from circuit
• Output bias: +10 to + 18 VDC
• Case material: 300 series stainless steel
• Includes installation sheet and mounting bolts
• Cable length: 50 feet
• Ratings: 
• Class I, II, III, Division I, Groups A, B, C, D, E, F, G
• Hazardous indoor or outdoor location with safety barrier