PCB Piezotronics
PCB Piezotronics 685a Series Linear Adjust Mechanical Switch
Model 685A19:Linear adjust mechanical switch, 0 to 7 g’s, 0 to 100 Hz, pushbutton and remote (24 VDC) reset
Available models include 685A19, 685A29, 685A39.

Model 685A19:Linear adjust mechanical switch, 0 to 7 g’s, 0 to 100 Hz, pushbutton and remote (24 VDC) reset
This series includes the official PCB Piezotronics models listed below.
Key Features
Model 685A19:Linear adjust mechanical switch, 0 to 7 g’s, 0 to 100 Hz, pushbutton and remote (24 VDC) reset
- Measurement Range: 7 g pk (68.7 m/s² pk)
- Cable Input: 3/4-14 NPT
- Relay: 3A Form C 480 VAC
- Electrical Connector: Screw Terminals
Model & Varian
| Model | Measurement Range | Frequency Range | Relay | Relay(Contacts) (DPDT) | Reset Function | Remote Reset | Temperature Range (Operating) | Enclosure Rating |
|---|---|---|---|---|---|---|---|---|
| 685A19 | 7 g pk / 68.7 m/s² pk | 0 to 6000 cpm / 0 to 100 Hz | 3A Form C 480 VAC | Normally Open / Closed | Momentary Pushbutton Switch | +/-24 VDC | -40 to 140 °F / -40 to 60 °C | IP66 |
| 685A29 | 7 g pk / 68.7 m/s² pk | 0 to 6000 cpm / 0 to 100 Hz | 3A Form C 480 VAC | Normally Open / Closed | Momentary Pushbutton Switch | 120 VAC | -40 to 140 °F / -40 to 60 °C | IP66 |
| 685A39 | 7 g pk / 68.7 m/s² pk | 0 to 6000 cpm / 0 to 100 Hz | 3A Form C 480 VAC | Normally Open / Closed | Momentary Pushbutton Switch | 240 VAC | -40 to 140 °F / -40 to 60 °C | IP66 |
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Spesifikasi
| Measurement Range | 7 g pk / 68.7 m/s² pk |
|---|---|
| Frequency Range | 0 to 6000 cpm / 0 to 100 Hz |
| Relay | 3A Form C 480 VAC |
| Relay(Contacts) (DPDT) | Normally Open / Closed |
| Reset Function | Momentary Pushbutton Switch |
| Remote Reset | +/-24 VDC |
| Temperature Range (Operating) | -40 to 140 °F / -40 to 60 °C |
| Enclosure Rating | IP66 |
| Size - Width | 4.35 in / 110.5 mm |
| Size - Height | 3.30 in / 83.8 mm |
| Size - Depth | 4.35 in / 110.5 mm |
| Weight | 2.8 lb / 1271 gm |
| Sensing Element | Magnet |
| Housing Material | Aluminum Alloy |
| Electrical Connector | Screw Terminals |
| Screw Terminal Wire Size | 24-14 AWG / 0.2 - 2.5 mm² |
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