Features

Microprocessor based modular design

Industry standard 4-20mA output

LED Status Indicator

12-24 VDC Power input

Reverse polarity protection

Class I, Div 1, Suitable for use in Hazardous Location

Simple Calibration

Description

Model PT205 sensor is designed to detect Hydrogen Sulfide in air and provides an analog output signal. PT205 uses electrochemical cell technology to detect H2S in parts per million (ppm).

The complete sensor consists of a stainless steel sensor head assembly, a user connection board and a transmitter board assembly. All of the sensor electronics are enclosed in an explosion proof instrument box. Sensor modular design allows easy maintenance, troubleshooting and high reliability. The low power microprocessor based sensor transmitter provides a 4-20mA analog signal proportional to 0 - 100% of the detection range of the sensor. Also an LED indicator on the transmitter board provides sensor status and fault condition.

Specifications

Sensor Type

Electrochemical

Measuring Range

0 to 100 parts per million (ppm)

Repeatability

± 2 % Full scale

Zero Drift

< 5% per year

Response Time

T90 < 30 seconds with 100% FS gas applied

Classification

Class I, division 1, Groups B, C & D

Operating Temperature

-4°F to +122°F  (-20°C  to +50°C)

Operating Humidity

15% to 90% RH, non-condensing

Mechanical Specifications

Length:   7 inches   (178 mm)

Width:    5 inches    (127 mm)

Height:   4 inches    (100 mm)

Status Indicators

LED indicator of sensor status
and fault condition.  

Approvals

CSA Approved

CSA Standard  C22.2 No 30-M1985 &

C22.2 No 142-M1987

Input Power

14-28 VDC.  24 VDC nominal

Power Consumption

< 1.1 Watt.  Typical 45mA @ 24 VDC

Analog Output

Linear 4-20mA  (300  Ohms max. load)
< 1.0 mA - Sensor malfunction

Cable Requirement

3 wire shielded cable.
Max loop resistance of
20  Ohms @ 24 VDC nominal

Cable Entry Hub

¾” NPT Female