Knowz™ gas detectors are simple analog "go-no go" devices intended for non-hazardous locations.

Various versions are available to monitor combustible gases as well as refrigerant gases and ammonia.

Options include 5VDC, 9-12VDC or 7-40VDC powering, dry relay contacts, alarm beeper.

Relay types include: SPST (NO or NC) and SPDT. Relays may be auto-resetting or latching (manual reset).

Knowz™ Features:

• Long life MOS (tin dioxide) sensor
• Solid state operation
• Combustible, ammonia & CFC versions
• 10-80% LEL detection (combustibles)
• 30-300 ppm ammonia detection
• 300-3000 ppm R-21/22/113/134a detection
• 30 seconds start-up time
• 4 secs. T90 response time
• 10 secs. T10 recovery time
• Red LED status indicator
• Optional NO and/or NC dry relay
• Manual reset or auto-resetting relay operation
• Optional 80dB alarm beeper
• User-settable alarm via trimpot
• Each device factory pre-calibrated
• -20 to +70 Celsius operation
• Optional 5VDC @ 160mA (~800 mW) operation (Option I0")
• Standard 9-12VDC @ 200mA (~2W) operation (Option "I1")
• Optional 7-40VDC input power version (Option "I2")
• Optional 7-60VDC input power version (Option "I3")

Knowz™ Details:

Alarm Level·  Specify alarm level for factory calibration
·  Alarm level from 10-80% of reading range
·  Level is field-adjustable by user via trimpot

State Indications·  Normal and alarm state indication
·  Red LED steady=normal, blinking=alarm
·  Optional beeper for alarm indication
·  Optional relay for alarm/power fail indication

Environmental Requirements·  Diffusion sampling
·  10% minimum atmospheric oxygen
·  10% to 95% R.H. (non-condensing) oper.
·  0.8 to 1.2 Atmosphere operating pressure

Relay Types·  SPST - NO or NC contacts (2)
·  SPDT - NO and NC contacts (3)
·  Auto-resetting operation - all types
·  Latching (manual reset) - SPDT types
·  Choose SPST-NC for power fail detection

Calibration·  All devices factory calibrated
·  Span trimpot for field calibration
·  Do not use desiccated (0% R.H.) cal gas
·  Six month recalib. schedule recommended
·  Periodic factory recertification avail.

Incompatible Uses·  Not for use in anaerobic environments
·  No dusty or corrosive environments
·  No condensing moisture
·  Not for use with desiccated calibration gas
·  No butane gas bump-testing
·  Adversely affected by silicone vapors
·  Very high gas levels may damage sensor

Mechanical·  Open-frame circuit size: 61 x 48 x 26 mm
·  No-flange enclosure size: 74 x 56 x 26 mm
·  Flanged enclosure size: 74 x 82 x 26 mm
·  Open-frame weight: 30 g
·  Enclosed weight: 50 g