Japan, Shinagawa Sokki
Shinagawa Sokki Liquid Free Type Temperature Compensated Pressure Switch
Product Made in Japan
Manufacturer: Shinagawa Sokki Mfg. Co.,Ltd
Product name: Liquid Free Type
Features
1. Automatic compensation for pressure change due to temperature
This product is equip with a function to compensate pressure change of SF6 gas due to temperature by bimetal. This temperature compensating mechanism enables proper detection of a pressure drop due to SF6 gas leakage.
2. Complete removal of liquid leakage risks
With the inert liquid fill in the switch, high lubrication, anti-corrosion, and anti-vibration effects are improved in the internal mechanism with the standard model. The liquid free model is designe to enclose nitrogen gas in place of liquid and adopt an even more specialized internal mechanism giving it nearly the same capacity as the standard model.
3. Simple installation and removal through weight reduction
The case and other materials have been reconsider to realize a reduction in weight. (Standard model: 1.7kg → Liquid free model: 1.35kg)
4. Improvements to the working properties of wiring
The working properties of wiring have been improved by enlarging the terminal box and terminal screw dimensions.
Example for setting pressure
Unit:：MPa Setting temperature：20℃
| Rated pressure | 1st contact (lower limit) | 2nd contact (lowest limit) |
| 0.35 | 0.30 ±0.02 | 0.25 ±0.02 |
| 0.50 | 0.45 ±0.02 | 0.40 ±0.02 |
| 0.55 | 0.50 ±0.02 | 0.45 ±0.02 |
| 0.60 | 0.55 ±0.02 | 0.50 ±0.02 |
Specifications
| 1）Ambient temperature | -20℃～+40℃ |
| 2）Temp. compensation range | -20℃～+60℃ |
| 3）Indication accuracy | ±1% F.S. (at +20ºC) |
| 4）Scale range (example) | -0.1MPa（-76cmHg）～1MPa (10kgf/cm2) |
| 5）Contact mechanism | Magnet assist type (2 lower limits) |
| 6）Contact capacity | more than 0.05A at 250V AC, more than 0.1A at 125V AC (inductive breaking current) more than 0.13A at 250V DC, more than 0.26A at 125V DC (non-inductive breaking current) |
| 7）Max. allowable gas leakage | 1 × 10-9 Pa･m3/s or less |
| 8）Operating vironment | Both indoors and outdoors |
| 9）Weight | Approx. 1.35 kg |
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