LPT Low Power Transmitter

    Key Features

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    2-wire loop, 3-wire VDC or 4-wire VAC power
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    Linear 4 - 20 mA output signal
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    Standard water / dust tight, corrosion resistant enclosure (drip proof). IP54 certified with optional splash guard installed.
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    Single sensor: carbon monoxide (CO) or nitrogen dioxide (NO2)
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    RoHS compliant circuit boards
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    Easy maintenance
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    Economical
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    Includes sensor CEF (calibration extending firmware)
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    Auto resetting fuse
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    Automated calibration procedure

The LPT is an economical, single sensor, analog transmitter available with either a Carbon Monoxide (CO) or Nitrogen Dioxide (NO2) sensor which are ideal for vehicle exhaust type applications such as parkades. It features a two-wire loop power, three-wire VDC or four-wire VAC power, 4 - 20 mA linear output signal, automatic thermal resetting fuse, temperature compensation, and visual LED indication for power and fault conditions, all in a RoHS compliant package.

All models in the LPT series of transmitters come standard with a water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. An optional splash guard is also available for water spray or wash down applications.  

Automated calibration and other maintenance procedures are simple and easily performed in the field, and our proprietary Calibration Extending Firmware (CEF) takes into account the aging of the sensors so that less frequent calibrations are acceptable in non-critical applications.

LPT and LPT-A Product Overview VideoLPT and LPT-A Product Overview Video

 


 

APPLICATIONS

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    Parking Garages
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    Repair Shops
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    Ice Cleaning Machine Rooms
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    Manufacturing Plants
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    Maintenance Facilities

Gas Types

Carbon Monoxide (CO)
Nitrogen Dioxide (NO2)

Sensors

Carbon Monoxide (CO) Sensor
Type: Electrochemical
Range: 0 - 200 ppm
Sensor Response Time (T90): 60 seconds
Operating Temperature: -10°C to 60°C (14°F to 140°F)
Operating Humidity: 5 - 95% RH non-condensing
Operating Pressure: N/A
Resolution: 0.5 ppm
Repeatability: < 2% of signal
Maximum Zero Shift: N/A
Clean Air Output Drift: < 10 ppm equivalent per year
Expected Life Span: 6+ years in air (under normal conditions)
Calibration: Every 6 months or once a year (depending on application)
Cross Sensitivity: H2S @ 20 ppm = < 0.1 ppm
NO2 @ 10 ppm = < 0.1 ppm
Cl2 @ 10 ppm = < 0.1 ppm
NO @ 50 ppm = < 5 ppm
SO2 @ 20 ppm = < 0.1 ppm
H2 @ 20°C (68°F) @ 400 ppm = < 60 ppm
C2H4 @ 400 ppm = < 25 ppm
NH3 @ 20 ppm = < 0.01 ppm

 

Nitrogen Dioxide (NO2) Sensor
Type: Electrochemical
Range: 0 - 10 ppm
Response Time (T90): < 30 seconds
Operating Temperature: -20°C to 50°C (-4°F to 122°F)
Operating Humidity: 15 - 90% RH non-condensing
Operating Pressure: Atmospheric ± 10%
Response: 0.02 ppm
Repeatability: < 2% of signal
Maximum Zero Shift: ± 0.2 ppm equivalent
Clean Air Output Drift: < 2% signal loss / month
Expected Life Span: 5 - 6 years in air (under normal conditions)
Calibration: Every 6 months or once a year (depending on application)
Cross Sensitivity: H2S @ 20 ppm = < -40 ppm
Cl2 @ 10 ppm = 100 ppm
NO @ 50 ppm = < 0.5 ppm
SO2 @ 20 ppm = < -2.5 ppm
CO @ 400 ppm = < 0.1 ppm
H2 @ 400 ppm = < 0.1 ppm
C2H4 @ 50 ppm = < 0.1 ppm
NH3 @ 20 ppm = < 0.1 ppm
CO2 @ 5% volume = < 0.1 ppm

Mechanical

Enclosure: ABS / Polycarbonate
Weight: 200 g (7 oz)
Size: 5.0” x 4.0” x 1.9” (127 mm x 102 mm x 48 mm)

Electrical

Power Requirement: 2-wire mode: 16 - 30 VDC, 1 W, Class 2
3-wire mode: 16 - 30 VDC, 1 W, Class 2
4-wire mode: 12 - 27 VAC, 50-60 Hz, 1 VA, Class 2
Current Draw: Typical 25 mA
Wiring: VDC two or three conductor shielded 18 awg stranded
VAC four conductor shielded 18 awg stranded
Fuse: Automatic resetting thermal

Input / Output

Outputs: Linear 4 - 20 mA
Maximum 216 Ω load (wiring plus termination resistor) at 16 VDC
Maximum 316 Ω load (wiring plus termination resistor) at 12 VAC

User Interface

Indicator: Single color status LED

Environmental

Operating Temperature: -20°C to 40°C (-4°F to 104°F)
Humidity: 15 - 90% RH non-condensing


Note: Measurements above are sensor dependent.

Certifications

Conforms to: CSA-C22.2 No. 205-M1983 (R2009)
                          UL508 (Edition 17):2007
Conforms to: EMC Directive 2004/108/EC
                          EN 50270:2006, Type 1, EN61010
Conforms to:  FCC. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

More Brochures

Product Specifications

Application Brochures

Quick Application Guide
Quick Application Guide For Fixed Gas Detection SystemsFor Fixed Gas Detection Systems

Drawings

Software

Sensor Specification


Engineering Specification Samples

DataSheets

Operation Manual

Part Numbers

Description Code
Single channel, electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range), LED indicator, 4 - 20 mA output, two-wire / three-wire / four-wire VAC power, sensor CEF, water / dust tight enclosure  LPT-TCO
Single channel, electrochemical nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LED indicator, 4 - 20 mA output, two-wire / three-wire / four-wire VAC power, sensor CEF, water / dust tight enclosure  LPT-END

Options

Description Code
Splash guard, factory installed, IP54 rating  S

Metal Protective Guard

» 16 gauge, clear anodized metal protective guard
» Larger size for controllers & self-contained systems
» Smaller size for analog & digital transmitters

Calibration Kit

» Commonly used tools required for calibration in one convenient toolbox
 


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