Texas Analytical Controls Home Page

101MS-4 For Hydrogen Sulfide

The New H2S Transmitter From Texas Analytical Controls

Click on the small images to view enlargements

As you would expect from the leader in Hydrogen Sulfide gas technology, Texas Analytical Controls is proud to announce its latest and most reliable H2S Transmitter -- Model 101MS-4.

The 101MS-4 utilizes our unique thin film solid state sensor. It is capable of detecting from PPBs to % levels of Hydrogen Sulfide. Nominal range of the transmitter is 0-10 PPM up to 500 PPM.

The electronics are housed in an explosion-proof enclosure suitable for Class I, Division I, Groups B, C, and D. This rating is maintained throughout the normal operation as well as calibration of the transmitter. Calibration is initiated by a small magnet without opening the cover. Area declassification is not required.

Calibration of the 101MS-4 is fast, simple and reliable. The only 2 items required for calibration are a known standard source of gas and a small magnet. While holding the magnet briefly over the "CAL" label on the front panel, a letter "C" will start flashing on the display, signifying the start of the calibration cycle. Two to four minutes later, the "C" ceases to flash and the program automatically adjusts the internal gain of the unit to the predefined concentration stored in the EEPROM. The display will then reflect the correct concentration of gas applied. A minute later, the alarm relays and the 4/20 mA output become active again. Calibration is complete, no pots to adjust, no ZERO or SPAN voltages to remember and set.

The gas concentration is displayed on a large 3 1/2" digital display. A 4/20 mA output is provided which can be used with any computer or SCADA system in a control room.

Optional are two alarm relays for local level control at the sensor site. This reduces the cost for running additional cables for local alarms.

Every significant parameter in the Model 101MS-4 is field programmable. From range, alarm set-points, latching - non-latching status of alarms, to calibration gas concentration. Operators can program all these features with ease in the field.

When used with TAC Hydrogen Sulfide monitoring system, 12 VDC power will be provided by the monitor. If used as stand-alone unit, the 101MS-4 can be powered from 12 to 24 VDC.

TAC's unique sensor can work in harsh environments present in oil rigs or in gas plants without affecting its performance. The sensor has a two-year warranty, however it is expected to last up to five years in air.

Specifications:

Detection Method: Solid-state thin-film, semi-conductor; diffusion / adsorption.	Sensor Life: Guaranteed: Two years; expected life five years in air.
Humidity Range: No effect up to 100%, non-condensed.	Signal Output: 4-20 mA The Model 101XP-2 can be ordered with one H2S and one LEL Sensor. The monitor has an LED display for each sensor.
Response Time: • 0-10 ppm in less than 10 seconds with 50 ppm H2S applied. • 1-10 ppm in less than 5 seconds with 100 ppm H2S applied.	Sensitivity: No loss of sensitivity or response time due to lack of exposure to H2S; no poisoning effect due to 100% H2S exposure.
Sensitivity Range: Detection of less than 500 ppb up to % range of H2S.	Accuracy: +/- 5% full scale.
Clearing Time: 80% clear in less than 40 seconds; 100% clear in less than 3 minutes.	Electrical Classification: Class I, Div. I; Groups B, C & D.
Operating Temp.: -300º F to + 1500º F	Interconnect Wiring: • 18 gauge, 3 conductors up to 500 ft. • 16 gauge, 3 conductors up to 1,600 ft. • 14 gauge, 3 conductors up to 3,000 ft.

Ordering Information:

101MS

Single Channel H2S Transmitter, 12-24 VDC, 4-20mA

101MS-4R

Single Channel H2S Transmitter, 2 Relay Contacts, 12-24 VDC, 4-20mA

101XP-2

Two Channel H2S Transmitter, 12-24 VDC, 4-20 mA, Common SPDT Relay Contacts for Hi, Low & Fail

Wiring Diagram for 101MS and Monitor

Also Available: Click here for more information

201MS

Single Channel LEL Transmitter, 12-24 VDC, 4-20mA

201MS-R

Single Channel LEL Transmitter, 2 Relay Contacts, 12-24 VDC, 4-20mA

201XP-2

Two Channel LEL Transmitter, 12-24 VDC, 4-20 mA, Common SPDT Relay Contacts for Hi, Low & Fail

Back to Other Products