| Model |
Main unit: PS-8N, PS-8M
Sub unit: PS-8S |
| Sensor Detection Principle |
Electrochemical cell, Hot wire semiconductor, Galvanic cell |
| Sampling Method |
Pump suction type (approx. 0.5L/min ±20% automatic suction flow rate control) |
| Target Gas |
Set to user specifications |
| Detection Range |
Set to user specifications |
| Display |
Monochrome LCD full dot display
Gas concentration: 5-digit display(with units)
Others: Gas name display, flow rate status indicator, alarm (1st and 2nd stage) status indicator, fault alarm display
*Not available for PS-8S. display on main unit |
| Alarm Set Value |
Set to user specifications |
| Alarm Accuracy |
Combustible gas : ±25% of alarm set value (under equivalent conditions)
Toxic gas : ±30% of alarm set value (under equivalent conditions)
Oxygen deficiency: ±1vol% (under equivalent conditions) |
| Alarm Delay |
Combustible gas : within 30 seconds at 1.6 times the alarm set value
Toxic gas : within 60 seconds at 1.6 times the alarm set value
Oxygen deficiency: within 5 seconds at 10 vol% until the concentration reaches 18 vol% (at 20±2°C)
(Excluding pipe length and communication time for all gases listed above) |
| Alarm Display |
Gas alarm 1st stage: Alarm 1 LED (red) flashes, LCD screen display ALARM1
Gas alarm 2nd stage: Alarm 2 LED (red) flashes, LCD screen display ALARM2 |
| External Outputs |
[Digital signal*1]
・PS-8M: Ethernet 10BASE-T/100base-Tx(Modbus/TCP)
Modbus/TCP (Maximum number of connections depends on system configuration)
Maximum transmission distance 100m (up to HUB)
・PS-8N, PS-8S: None *PS-8N: RS485 (Modbus-RTU) when using the expansion unit MR module
[Gas concentration analogue signal*2]
・PS-8N, PS-8M: DC4-20mA (common negative terminal with power source) (output accuracy: within FS ±0.5%)
*0.6mA or less when a fault alarm indication occurs *300Ω or less including wiring resistance [Collective gas alarm contact(1st and 2nd stage), collective fault alarm indication contact*3]
1a non-voltage contact/ automatic return
*Rated load: AC125V 0.5A or DC30V 1.0A (resistive load)
*Individual contact outputs require an expansion unit. |
| Explosion-proof Performance |
Non-explosion-proof |
| Operating Temperature and Humidity Range |
0℃ to 40℃ (given no sudden changes), 30 to 85% RH (given no condensation) |
| Power Source Used |
・PS-8N: DC24V±10%
・PS-8M: DC24V±10% or PoE (Power over Ethernet, IEEE 802.3at)
・PS-8S: Supplied from the main unit |
| power consumption*4 |
CDS-7: 3.5W (max. 5.2W)
CDS-7 (catalytic conversion type): 4.0W (maximum 5.9W)
COS-7: 3.5W (max. 5.2W)
CHS-7: 4.0W (max. 5.9W) |
| dimensions, mass |
・PS-8N, PS-8M: W70mm x H124mm x D172mm (excluding protrusions), approx. 850g (excluding sensor)
・PS-8S: W70mm x H124mm x D172mm (excluding protrusions), approx. 770g (excluding sensor unit) |
