HydroKnowz™ monitors use catalytic sensors to measure hydrogen in air up to 25,000 ppm (2.5% volume).

These sensors feature VOC filters, good long term stability, native linearity, increased tolerance of silicone-based contaminants, and are immune to overexposure damage.

Options include 3VDC (regulated) or 5-40VDC / 5-60VDC operation, dry relay contacts, alarm beeper, 0-3VDC / 4-20mA (proportional) or TTL (binary) output signal.

HydroKnowz™ Features:

• Catalytic sensor (with VOC filter)
• HCMOS microcontroller
• 0-25,000ppm hydrogen in air measurement
• 100ppm resolution
• 2 seconds start-up time
• 2 secs. T90 response time
• 5 secs. T10 recovery time
• Normal, Warning, Alarm & Error states
• Bi-color LED status indicator
• Optional NO or NC dry relay
• Manual reset or auto-resetting operation
• Optional 0-to-3V proportional output (8 bit)
• Optional 4-20mA proportional output (8 bit)
• Optional binary operation (TTL output)
• Optional alarm beeper
• PK-Port™ compatible digital communications
• User-settable alarm/warning via PK-Port™
• Digital FLASH-based calibration
• Each device factory pre-calibrated
• Field re-programmable firmware
• -40 to +80 Celsius / 0% to 99% R.H. operation
• Sensor & temperature error detection
• 1000 mW power consumption
• Optional 3VDC (regulated) input power version (Option "I1")
• Optional 5-40VDC input power version (Option "I2")
• Optional 5-60VDC input power version (Option "I3")

HydroKnowz™ Details:
Warning & Alarm Levels·  Alarm & warning PPMs specified at order time
·  Alarm level from 2,000 to 20,000 ppm
·  Warning level/action is optional
·  Warning level from 20-80% of alarm level
·  Levels are field-adjustable via PK-Port™

State Indications·  Normal, warning, alarm & error state
·  Bi-color LED indicates all states
·  Optional beeper for alarm & error indication
·  Errors-as-Alarms for fail safe operation
·  Warning and/or alarm trigger relay/TTL
·  Live monitoring & data logging via PK-Port

Reliability Features·  Audio-visual or alarm-producing errors
·  Sensor failure & disconnection detection
·  Temperature out-of-bounds detection
·  Digital calibration values delimited
·  Low supply voltage inhibit
·  Power fail detect via signal offset loss/relay
·  Watchdog timer & software checksums

Environmental Requirements·  Diffusion sampling
·  3 meters/second flow rate maximum
·  5% minimum atmospheric oxygen
·  0% to 99% R.H. (non-condensing) oper.

Calibration·  All devices individually calibrated ·  FLASH-based calib. accessible via PK-Port ·  Periodic factory recertification avail. Incompatible Uses·  Not for use in anaerobic environments

HydroKnowz™ Options:
PK-Port Interface·  Access via interface connector pin
·  PC (serial) interface module extra
·  Real-time monitoring and data-logging
·  Access/modify config. & cal. values

Mechanical·  Open-frame circuit size: 61 x 48 x 26 mm
·  Aluminum enclosure size: 74 x 82 x 26 mm
·  Open-frame weight: 30 g
·  Enclosed weight: 50 g

Error Handling Options
1. Audio-visual indication of errors [E1]
2. Errors trigger alarms (fail safe) [E2]

Output Signal Option
1. TTL - Norm.-high, Auto (self-clearing) [O1]
2. TTL - Norm.-low, Auto (self-clearing) [O2]
3. TTL - Norm.-high, Latch (Button reset) [O3]
4. TTL - Norm.-low, Latch (Button reset) [O4]
(Specify TTL signal to respond to warning    state, alarm state, or both.)

5. Proportional output - 0 to 3VDC [O5]
    0.5V safety offset (zero reading)
    200 steps of 20mV each
    Each step equals one resolution unit
6. Proportional output - 4-20mA [O6]

Audio Sounder Options1. No beeper [S0]
2. Included beeper [S1]

Relay Options
1. Relay not required [R0]
2. Normally-closed, Auto (self-clearing) [R1]
3. Normally-open, Auto (self-clearing) [R2]
4. Normally-closed, Latch (Button reset) [R3]
5. Normally-open, Latch (Button reset) [R4]
Specify relay to respond to warning state, alarm state, or both.

Enclosure Options
1. Open-frame (Circuit board only) [P0]
2. Anodized aluminum case (With flange) [P1]

Powering Options
1. 3 VDC (+/- 2%) [I1]
2. 5-to-40 VDC switch mode PSU [I2]
3. 5-to-60 VDC switch mode PSU [I3]

Interface Connector
1. Molex 6-pin Mini-Fit Jr. Header
  - Pin 1: Input power (+)
  - Pin 2: Ground (common)
  - Pin 3: Output signal
  - Pin 4: Dry relay contact #1
  - Pin 5: Dry relay contact #2
  - Pin 6: PK-Port interface

Custom connectors & harnesses are available with nominal NRE. Please call or email to discuss custom requirements.