65-2423RK-05

Hydrogen Sulfide Detector

Operator’s Manual

Part Number: 71-0126RK

Revision: A

Released: 7/18/14

www.rkiinstruments.com

WARNING

Read and understand this instruction manual before operating detector. Improper use of the detector could result in bodily harm or death.

Periodic calibration and maintenance of the detector is essential for proper operation and correct readings. Please calibrate and maintain this detector regularly! Frequency of calibration depends upon the type of use you have and the sensor types.

Typical calibration frequencies for most applications are between

3 and 6 months, but can be required more often or less often based on your usage.

65-2423RK-05 H

2

S Detector

Product Warranty

RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge. This warranty does not apply to those items which by their nature are subject to deterioration or consumption in normal service, and which must be cleaned, repaired, or replaced on a routine basis. Examples of such items are: a) Absorbent cartridges b) Pump diaphragms and valves c) Fuses d) Batteries e) Filter elements

Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair procedures not in accordance with the operator’s manual. This warranty indicates the full extent of our liability, and we are not responsible for removal or replacement costs, local repair costs, transportation costs, or contingent expenses incurred without our prior approval.

THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER

WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED,

AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF

RKI INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO, THE

WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE. IN NO EVENT SHALL RKI INSTRUMENTS,

INC. BE LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL

LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE OF

ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR

OPERATE PROPERLY.

This warranty covers instruments and parts sold to users by authorized distributors, dealers, and representatives as appointed by RKI Instruments, Inc.

We do not assume indemnification for any accident or damage caused by the operation of this gas monitor, and our warranty is limited to the replacement of parts or our complete goods.

65-2423RK-05 H

2

S Detector

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Detector Housing, Housing Cap, & Cap Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Rubber Boot and Spacer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Mounting the H

2

S Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Wiring the H

2

S Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Setting the Zero Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Replacing Components of the H

2

S Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

65-2423RK-05 H

2

S Detector

Overview

This manual describes the 65-2423RK-05 hydrogen sulfide (H

2

S) detector. This manual also describes how to install, start up, maintain, and calibrate the detector when it is used with a gas monitoring controller. A parts list at the end of this manual lists replacement parts and accessories for the H

2

S detector.

Specifications

WARNING: Do not use this product in a manner not specified in this instruction manual.

Table 1 lists specifications for the H

2

S detector.

Table 1: Specifications

Target Gas

Area Classification*

Temperature Code

Hydrogen sulfide (H

2

S)

Explosionproof for Class I, Groups B, C, and D

T6

Installation Category

Sampling Method

H2S Detector Signal Output

Detection Range

Accuracy

Installation Category 1. Signal level, special equipment or parts of equipment, telecommunication, electronic, etc., with smaller transient overvoltages than Installation Category (Overvoltage

Category) II (ref. IEC 664).

Diffusion

0.3 mA at 0 ppm H2S nominal

2.5 mA at 100 ppm H2S nominal

0 to 100 PPM (parts per million)

± 5% of reading or ± 2 ppm H

2

S (whichever is greater)

Response Time

Operating Temperature

90% in 30 seconds

-40°F to 104°F (-40°C to 40°C)

* The area classification only applies if the detector is installed using a junction box with an internal volume less than or equal to 69 cubic inches and rated explosion proof for Class I, Groups B, C, and D. The detector is not explosion proof if it is installed in a non-explosion proof enclosure, such as in a conduit hub of a controller like the Beacon 200 or Beacon 800.

NOTE: The following symbol on the detector label is a caution to the user to refer to this documentation for installation and operation instructions:

!

WARNING: When using the 65-2423RK-05, you must follow the instructions and warnings in this manual to assure proper and safe operation of the

65-2423RK-05 and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 65-2423RK-05 as described in this manual.

65-2423RK-05 H

2

S Detector • 1

Description

This section describes the components of the H

2

S detector. The detector consists of the detector housing body, housing cap, cap gasket, rubber boot, spacer, and the H

2

S sensor.

Detector Housing Body

Cap Gasket

H2S Plug-in Sensor

Spacer

Rubber Boot

Detector

Housing Cap

Flame

Arrestor

Guard

Figure 1: H

2

S Detector Component Location

Detector Housing Body, Housing Cap, & Cap Gasket

The detector housing body protects the sensing components within the housing. Use the mounting threads at the top of the housing to screw the H

2

S detector into a 3/4” NPT hub.

Use the removable cap near the bottom of the housing to access the sensor for maintenance or replacement. The cap protects the sensor from damage and includes a flame arrestor which contains any sparks which may occur within the detector housing. A cap gasket seals the interface between the housing and cap. A flame arrestor guard is permanently bonded to the cap.

Two wires extend from the top of the detector housing. Use these wires to connect the H

2

S detector to a controller. The housing includes a four-socket pattern. This socket pattern accepts the sensor’s four pins to secure the sensor within the detector housing. A preamplifier, located between the sockets and two interconnect wires, conditions the sensor’s signal before the signal reaches the controller.

Rubber Boot and Spacer

A rubber boot and spacer are installed between the detector housing cap and the sensor.

They help ensure that the detector remains plugged into the detector housing body.

Sensor

The sensor is secured within the sensor housing by four pins. Through a series of chemical and electrical reactions, the sensor produces an electrical output that is proportional to the detection range of the detector.

2 • 65-2423RK-05 H

2

S Detector

Installation

NOTE:

Normally, the H

2

S detector is shipped already installed in one of the bottom conduit hubs of a controller and factory wired to the controller. If your detector is already installed in a controller, use this section for reference only.

This section describes procedures to mount the H

2

S detector in the monitoring environment and wire the detector to a controller.

Mounting the H

2

S Detector

1.

Whether you will mount the detector directly to a controller or to a junction box, select a mounting site that is representative of the monitoring environment. Consider the following when you select the mounting site.

• Select a site where the detector is not likely to be bumped or disturbed. Make sure there is sufficient room to perform start-up, maintenance, and calibration procedures.

• Select a site where the target gas is likely to be found first.

NOTE:

If your application does not require a specific mounting site, mount the detector at approximately breathing level.

9.75 Ref

2.25 Ref

Shrink Tubing

3/4 NPT

0.75

3.48

1.62 Flats for

Wrench

Ø 1.75

1-1/2-20 For Calibration Cup

Figure 2: Outline & Mounting Dimensions

65-2423RK-05 H

2

S Detector • 3

2.

At the monitoring site, mount the detector in one of the following two ways:

• Screw the detector’s 3/4” NPT mounting thread into an empty conduit hub on a controller.

OR

• Screw the detector’s 3/4” NPT mounting thread into an appropriately rated junction box.

CAUTION:

Mount the H

2

S detector with the detector facing down (see Figure 2).

NOTE: If the mounting site requires the detector installation to be explosion proof, you must install the detector in a junction box with an internal volume less than or equal to 69 cubic inches and rated explosion proof for Class I, Groups B, C, and

D.

Wiring the H

2

S Detector to a Controller

WARNING: Always verify that the power source is OFF before you make wiring connections.

1.

Turn off the controller.

2.

Turn off or unplug power to the controller.

3.

If the detector is mounted remotely from a controller using an explosion proof junction box, proceed to step 4.

If the detector is mounted directly to a controller, connect the detector’s red and black wires to the appropriate controller detector terminals and skip to the Startup Section.

4.

Remove the junction box cover.

WARNING: To maintain the explosion proof classification of the H

2

S detector/junction box combination, a conduit seal must be used within 18 inches of the junction box conduit hub used for wiring to the controller.

5.

Guide a two-conductor, shielded cable or two wires in conduit through an unused conduit hub of the junction box.

6.

Connect the two wires to the detector using an appropriate terminal block.

CAUTION:

If using shielded cable, leave the drain wire insulated and disconnected at the detector. You will connect the opposite end of the cable’s drain wire at the controller.

7.

Secure the junction box cover to the junction box.

8.

Route the cable or wires leading from the H

2

S detector through one of the conduit hubs at the controller housing.

CAUTION:

Do not route power and detector wiring through the same conduit hub. The power cable may disrupt the transmission of the detector signal to the controller.

4 • 65-2423RK-05 H

2

S Detector

.

9.

Connect the wires to the applicable controller terminal strip. See the controller operator’s manual and the controller’s detector head specification sheet for the H

2

S detector.

Controller H2S DetectorTerminals

(typical terminal designation shown)

+

S

Black Red

Figure 3: Wiring the H

2

S Detector to a Controller

10. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth) ground at the controller. RKI controllers typically have a ground stud that can be used to ground the cable’s drain wire.

11. Reinstall the junction box cover.

65-2423RK-05 H

2

S Detector • 5

Start Up

This section describes procedures to start up the H

2

S detector and place the detector into normal operation.

Introducing Incoming Power

1.

Complete the installation procedures described earlier in this manual.

2.

Verify that the power wiring to the controller is correct and secure. Refer to the controller operator’s manual.

3.

Turn on or plug in the incoming power at the power source end, then turn on the controller.

4.

Verify that the controller is on and operating properly. Refer to the controller operator’s manual.

CAUTION:

Allow the detector to warm up for 5 minutes before you continue with the next section, “Setting the Zero Signal”.

Setting the Zero Signal

WARNING: If the detector installation is explosion proof, do not remove the sensor cap or junction box cover while the circuits are energized unless the area is determined to be non-hazardous. Keep the sensor cap and junction box cover tightly closed during operation.

CAUTION:

If you suspect the presence of the target gas in the monitoring environment, use the calibration kit and the zero air calibration cylinder to introduce “fresh air” to the sensor and verify an accurate zero setting.

1.

Verify that the detector is in a fresh air environment (environment known to be free of hydrogen sulfide, other toxic and combustible gases, and of normal oxygen content,

20.9%).

2.

Verify a reading of 0 ppm H

2

S at the controller.

If the display reading is 0 ppm H

2

S, start up is complete. The detector is in normal operation. If the display reading is not 0 ppm H

2

S, continue with step 3.

3.

Perform a zeroing operation at the controller. See the controller operator’s manual for directions.

6 • 65-2423RK-05 H

2

S Detector

Maintenance

This section describes maintenance procedures. It includes preventive maintenance, troubleshooting, and component replacement procedures.

Preventive Maintenance

This section describes a preventive maintenance schedule to ensure the optimum performance of the H

2

S detector. It includes daily, monthly, and quarterly procedures.

Daily

Verify a display reading of 0 PPM H

2

S at the controller. Investigate significant changes in the display reading.

Monthly

This procedure describes a test to verify that the H

2

S detector responds properly to hydrogen sulfide. It describes the test using a calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. RKI

Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator.

NOTE:

Performing a response test on the H

2

S detector may cause alarms. Be sure to put the controller into its calibration program or disable external alarms before performing this test.

Preparing for the response test

1.

Place the controller into its calibration program or disable external alarms.

2.

Verify that the controller display reading for the channel you are testing is 0 ppm.

If the display reading is not 0 ppm, set the zero reading of the detector as described in the Start Up section of this manual, then continue this procedure.

3.

Screw the calibration cup onto the bottom of the H

2

S detector.

4.

Screw the regulator into the calibration cylinder.

5.

Use the sample tubing to connect the regulator to the calibration cup.

Performing the response test

1.

Turn the regulator’s on/off knob counterclockwise to open the regulator. Gas will begin to flow

2.

Allow the gas to flow for two minutes, then verify that the reading is within ± 20% of the cylinder gas concentration.

NOTE:

If the reading is not within ± 20% of the correct response reading, calibrate the detector as described in “Calibration” on page 11.

3.

Turn the regulator’s on/off knob clockwise to close the regulator.

4.

Unscrew the regulator from the calibration cylinder.

5.

Unscrew the calibration cup from the H

2

S detector.

6.

When the controller display reading falls below the alarm setpoints, return the controller to normal operation.

65-2423RK-05 H

2

S Detector • 7

Quarterly

Calibrate the H

2

S detector as described in “Calibration” on page 11.

Troubleshooting

The troubleshooting guide describes symptoms, probable causes, and recommended action for problems you may encounter with the H

2

S detector.

NOTE:

This troubleshooting guide describes detector problems only. See the controller operator’s manual for problems you may encounter with the controller.

Fail Condition

Symptoms

• The controller indicates a fail condition.

Probable causes

• The detector wiring is disconnected or misconnected.

• The detector’s zero reading is low enough to cause a fail condition.

• The detector is malfunctioning.

Recommended action

• Verify that the detector wiring is correct and secure.

• Calibrate the detector.

• If the fail condition continues, replace the H

2

S sensor as described later in this section.

• If the fail condition continues, contact RKI for further instruction.

Slow or No Response/Difficult or Unable to Calibrate

Symptoms

• The detector responds slowly or does not respond during the monthly response test.

• Unable to accurately set the zero or response reading during the calibration procedure.

• The detector requires frequent calibration.

NOTE:

Under “normal” circumstances, the detector requires calibration once every three months. Some applications may require a more frequent calibration schedule.

Probable causes

• The calibration cylinder is low, out-dated, or defective.

• The detector is malfunctioning.

Recommended action

1.

Verify that the calibration cylinder contains an adequate supply of a fresh test sample.

2.

If the calibration/response difficulties continue, replace the H

2

S sensor as described later in this section.

3.

If the calibration/response difficulties continue, contact RKI Instruments, Inc. for further instruction.

8 • 65-2423RK-05 H

2

S Detector

Replacing Components of the H

2

S Detector

This section includes a procedure to replace the H

2

S sensor and one to replace the entire detector assembly. In most cases, it is not necessary to replace the entire detector assembly.

Replacing the Sensor

CAUTION: The sensor contains electrolyte which is a dilute acid. Do not disassemble the sensor when replacing it with a new one. If sensor electrolyte comes in contact with your skin, wash affected area thoroughly with soap and water.

1.

Turn off the controller.

2.

Turn off or unplug power to the controller.

3.

Unscrew the detector housing cap from the detector housing.

4.

Unplug and remove the H

2

S sensor with the rubber boot and spacer attached.

5.

Remove the rubber boot and spacer from the old sensor.

6.

Install the spacer and rubber boot onto the replacement sensor’s face.

7.

Carefully plug the replacement sensor into the socket pattern that is located in the detector housing.

NOTE:

Match the sensor’s male pins with the four female sockets as you plug the sensor into the sockets.

8.

Screw the detector housing cap onto the top section.

9.

Turn on power to the controller.

10. Turn on the controller.

CAUTION:

Allow the replacement sensor to warm up for 5 minutes before you continue with the next step.

11. Calibrate the detector as described in “Calibration” on page 11.

Replacing the H

2

S Detector

NOTE:

In most cases, it is only necessary to replace the H

2

S sensor.

1.

Turn off the controller.

2.

Turn off or unplug incoming power to the controller.

3.

If the detector is installed directly on a controller, open the controller door.

If the detector is installed remotely from a controller in a junction box, remove the junction box cover.

4.

If the detector is installed directly on a controller, disconnect the detector leads from the detector terminal strip in the controller. Note the position of the color-coded leads as you remove them.

If the detector is installed remotely from a controller in a junction box, disconnect the detector leads from the terminal block in the junction box. Note the position of the color-coded leads as you remove them.

65-2423RK-05 H

2

S Detector • 9

5.

Unscrew the detector from the controller conduit hub or junction box hub.

6.

Guide the detector leads of the replacement detector through the controller conduit hub or junction box hub then screw the mounting threads of the detector into the hub.

7.

If the detector is installed directly on a controller, connect the detector leads to the appropriate detector terminal strip terminals. See the controller operator’s manual and the controller’s detector head specification sheet for the H

2

S detector.

If the detector is installed remotely from a controller in a junction box, connect the detector leads to the terminal block the same way the old detector was wired. See the controller operator’s manual and the controller’s detector head specification sheet for the H

2

S detector to verify the connections are correct.

8.

If the detector is installed remotely from a controller in a junction box, reinstall the junction box cover.

9.

Turn on or plug in power to the controller.

10. Turn on the controller.

CAUTION:

Allow the replacement detector to warm up for 5 minutes before you continue with the next step.

11. Calibrate the replacement detector as described in “Calibration” on page 11.

Calibration Frequency

Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 months is adequate for most H

2

S transmitter applications.

Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months for the H

2

S transmitter.

If an application is not very demanding, for example detection in a clean, temperature controlled environment, and calibration adjustments are minimal at calibration, then a calibration frequency of every 6 months is adequate.

If an application is very demanding, for example if the environment is not well controlled, then more frequent calibration than every 3 months may be necessary.

10 • 65-2423RK-05 H

2

S Detector

Calibration

This section describes how to calibrate the H

2

S detector. It includes procedures to prepare for calibration, set the zero reading, set the response reading, and return to normal operation. It describes calibration using a calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. RKI

Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator.

Preparing for Calibration

1.

Screw the calibration cup onto the bottom of the H

2

S detector.

2.

Screw the regulator into the zero air calibration cylinder.

3.

Use the sample tubing to connect the regulator to the calibration cup.

NOTE

If you can verify that the H

2

S detector is in a fresh air environment, you do not need to apply zero air to the detector before adjusting the zero reading.

4.

Put the controller into its calibration program.

Setting the Zero Reading

1.

Follow the directions in the controller operator’s manual for setting the zero reading.

2.

When the instructions call for applying zero air to the detector, turn the regulator’s on/off knob counterclockwise to open it. Gas will begin to flow.

3.

Allow the gas to flow for two minutes.

4.

Set the zero reading according to the controller operator’s manual.

5.

Turn the regulator’s on/off knob clockwise to close it.

6.

Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing connected to the regulator and the calibration cup.

Setting the Response Reading

1.

Screw the regulator into the calibration gas cylinder.

2.

Follow the directions in the controller operator’s manual for setting the response reading.

3.

When the directions call for exposing the detector to gas, turn the regulator’s on/off knob counterclockwise to open it. Gas will begin to flow.

4.

Allow the gas to flow to the detector for 2 minutes.

5.

Set the response reading according to the controller operator’s manual.

6.

After setting the response reading, unscrew the regulator from the cylinder and remove the calibration cup from the detector.

NOTE:

For convenience, leave the regulator and calibration cup connected by the sample tubing.

Returning to Normal Operation

1.

Allow about 45 seconds for the gas reading to decrease below the alarm points and then return the controller to normal operation.

65-2423RK-05 H

2

S Detector • 11

NOTE

: If you do not allow the gas reading decrease below the alarm points, then unwanted alarms may occur.

2.

Verify that the controller display reading decreases and stabilizes at 0 ppm H

2

S.

3.

Store the components of the calibration kit in a safe and convenient place.

Parts List

Part Number

06-1248RK

07-0033RK

07-0203RK

14-2101RK

65-2423RK-05

71-0126RK

81-0076RK

81-0076RK-01

81-0076RK-03

81-0151RK-02

81-0151RK-04

81-1050RK

Table 2 lists replacement parts and accessories for the H

2

S detector.

Table 2: Parts List

81-1051RK

81-1117RK

ES-1537-H2S

Description

Sample tubing (order by the foot)

Detector housing cap gasket

Rubber retaining boot

Spacer between sensor and rubber boot

H

2

S replacement detector assembly (includes sensor)

65-2423RK-05 H

2

S Detector Operator’s Manual (this document)

Zero air calibration cylinder, 17 liter steel

Zero air calibration cylinder, 34 liter steel

Zero air calibration cylinder, 103 liter steel

Calibration gas cylinder, 25 ppm H

2

S in nitrogen, 58 liter aluminum

Calibration cylinder (25 PPM H

2

S in nitrogen; 34 liter aluminum)

Regulator with gauge and knob, 0.5 LPM, for 17 liter and 34 liter steel calibration cylinders

Regulator with gauge and knob, 0.5 LPM, for 34AL/58/103 liter calibration cylinders)

Calibration cup

H

2

S replacement sensor

12 • 65-2423RK-05 H

2

S Detector