Purchase of Ammonia Sensors for CC Williams WWTP

Agency:	Mobile Water Service System(MAWSS)
State:	Alabama
Type of Government:	State & Local
NAICS Category:	334513 - Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334519 - Other Measuring and Controlling Device Manufacturing
Posted Date:	May 12, 2026
Due Date:	May 28, 2026
Solicitation No:	IFB 26-032
Original Source:	Please Login to View Page
Contact information:	Please Login to View Page
Bid Documents:	Please Login to View Page

Contract or Solicitation Number IFB 26-032
Solicitation Description

Addendum 1 posted on 05/12/2026. Per the addendum, the due date has changed to May 28, 2026.
Opening Date May 28th 2026
Contact Jed Barbour: (251) 378-3513 or jbarbour@mawss.com
Michael Ponder: (251) 721-2850 or mjponder@mawss.com
Solicitation Document(s)

IFB26-032PurchaseAmmoniaSensorsCCWms_2026-05-08-094251.pdf

Addendum1toIFB26-032PurchaseAmmoniaSensorsCCWms_2026-05-12-155649.pdf

Attachment Preview

Joyce Sawyer, Buyer II

(251) 694-3110 Office

jasawyer@mawss.com

INVITATION FOR BID

May 8, 2026

Mobile Area Water and

Sewer System

4725 Moffett Road

Mobile, AL 36618-2236

PO Box 180249

Mobile, AL 36618-0249

INVITATION FOR BID NUMBER

IFB 26-032

NAME OF BID

BIDS WILL BE RECEIVED AT

BID OPENING DATE

Purchase of Ammonia Sensors for CC Williams WWTP

MAWSS Purchasing Dept. Bid Box

East Visitor Entrance

4725 Moffett Road

Mobile, AL 36618

If sending bids by UPS/Fed Ex, deliver to the Warehouse:

1610 Shelton Beach Rd. Ext., Mobile, AL 36618

with IFB# marked on envelope

May 14, 2026

BID CLOSING TIME

10:30 am Central Time

AWARD WILL BE MADE BY

MATERIAL DELIVERED TO

ADDITIONAL INFORMATION CONTACT

Total Cost & Lead Time

CC Williams WWTP

1600 Yeend St.

Mobile, AL 36603

Jed Barbour (251) 378-3513 Email: jbarbour@mawss.com

Michael Ponder (251) 721-2850 Email: mjponder@mawss.com

APPLICABLE SDP POLICY

None

Sealed bids must be in the Purchasing Department no later than the time specified in order to be considered. Submissions

received after the deadline will not be considered. Envelopes must bear the name of the supplier, company address and the

words “IFB 26-032 Ammonia Sensors Purchase” or “IFB 26-032 NO QUOTE.” Facsimile or email bids will not be accepted.

All bids must be submitted on the attached forms, or your bid will be disqualified. Bidder shall furnish all the information

required by the solicitation. The bidder’s name must be typed or printed on the bid sheet and signed by the bidder or

appropriate authorized executive officer of the bidder’s company. Bidders must initial any changes or erasures. Bidders should

retain a copy of bids for their records.

Bidders shall acknowledge receipt of all addenda to this solicitation by signing and returning each addendum or by identifying

the addendum number and the date on the bid form. Failure to acknowledge receipt of any addendum by a bidder will result

in rejection of the bid if MAWSS determines that the addendum contains information that materially changes the requirements.

All bids shall be quoted FOB Destination, freight prepaid with no additional charges. Unless otherwise specified in the bid, all

prices will be on a firm-fixed price basis and are not subject to adjustments based on costs incurred. MAWSS reserves the right

to reject any or all bids submitted, to waive any informality in any bid or in the bid process, or to terminate the bid process at

any time, if deemed by MAWSS to be in MAWSS’s best interest.

A Purchase Order and this “Invitation for Bid” with “Specifications,” “Conditions,” “Bid Form,” signed by the successful bidder’s

authorized representative, and all attached drawings and other documents furnished by MAWSS to the bidders with the

Invitation for Bid in order to illustrate the contract requirements, will constitute a contract for the goods and/or services to be

purchased.

IFB 26-032 Ammonia Sensors Purchase

Page 1 of 14

IFB 26-032 AMMONIA SENSORS PURCHASE

CONDITIONS

The Board of Water and Sewer Commissioners of the City of Mobile will accept bids for the Ammonia Sensors Purchase in our

Purchasing Department Bid Box located at the East Visitor Entrance at 4725 Moffett Road, Mobile, AL. 36618 no later than

10:30 a.m. local time on May 14, 2026. Bids will be opened immediately after bid closing time in the Operations Center Board

room located at the East Visitor Entrance. Award will be by Total Cost & Lead Time. The bidder offers and agrees, if this bid is

accepted, to furnish the items as defined in the specifications for the unit price set opposite each item. Pricing shall be FOB

Mobile, Alabama. All items shall be delivered to CC Williams WWTP located at 1600 Yeend St., Mobile, AL 36603, or to the

job site as needed. The bidder shall state the expected length of delivery time on the Bid Form.

Bidder understands and agrees that manufacturer and part numbers are provided for descriptive purposes only. Items of equal

or better quality will be considered but must be approved by MAWSS in writing. Upon delivery, if the quality, durability or

performance of any product represented as equal or better is determined by MAWSS to be unsatisfactory, MAWSS will require

a suitable substitute or will require that the originally specified item be delivered, at the unit price originally offered by bidder.

No substitution for items to be provided pursuant to this contract shall be permitted during the contract period without the

express written consent of MAWSS. All items provided shall be for commercial use and for the purposes reflected in the

contract documents.

No bid on closed out or discontinued item(s) will be accepted. Item(s) that have a determinable shelf life must be disclosed at

the time of bid submittal. Bidder understands that his/her bid shall be good and may not be withdrawn for a period of sixty

(60) calendar days after the scheduled closing time for receiving bids.

Bidder understands and agrees that quantities will be purchased by MAWSS on an “as needed” basis to replenish inventory.

MAWSS shall not be committed to the purchase of a pre-established minimum quantity for any one item.

A bidder may not modify its bid after bid opening. Errors in the extension of unit prices stated in a bid or in multiplication,

division, addition or subtraction in a bid may be corrected by the MAWSS Purchasing Buyer prior to award. In such cases, unit

prices shall not be changed.

It is the responsibility of the bidder to determine prior to the bid opening whether any amendment, additions, deletions or

changes of any type have been made to this Invitation for Bid, Conditions, Specifications, Bid Form or any other bid documents.

Bid documents and any amendments made to this bid will be posted on our website at www.mawss.com.

Invoicing Requirements: MAWSS requires additional information for all work performed and services provided. On the vendor’s

invoice for payment should be a detailed listing of work performed, services provided, dates completed, locations involved,

and any other pertinent information needed to verify the work and/or services were completed in accordance to the bid specs.

This additional information can be supplied in the form of detailed invoices, work orders, checklists or any other documents

used to track the work performed or services provided but details must be included on the actual invoice. A copy of the invoice

and these additional details must be sent to the “ADDITIONAL INFORMATION CONTACT” found on Page 1 of the bid documents

and a copy emailed to Accounts Payable at AcctsPayable@mawss.com.

END OF CONDITIONS

IFB 26-032 Ammonia Sensors Purchase

Page 2 of 14

IFB 26-032 AMMONIA SENSORS PURCHASE

SPECIFICATIONS

WASTEWATER ANALYSIS INSTRUMENT CONTROLLER & PROBE SPECIFICATIONS

GENERAL

The purpose of this bid is to purchase:

1. Three (3) instrument controllers capable of transmitting sensor data from multiple water quality

parameters

2. Three (3) sensors for continuous monitoring of ammonium nitrogen and nitrate nitrogen in

wastewater treatment.

3. Two (2) high output air compressors capable of cleaning sensor equipment.

4. Items necessary for mounting/installation of the instrumentation.

Note: Potential bidders are encouraged to make a site visit to fully understand the requirements of a

successful implementation.

PART 1 - INSTRUMENT CONTROLLER GENERAL

1. A dual channel water quality sensor transmitter with a local user interface AND the ability to

access sensor data remotely through a browser enabled device.

2. Scope:

A. Provide labor, material, equipment, related services, and supervision to install and operate

the controller to drawings and manufacturer’s specifications.

3. Alternates:

A. Parameter-specific controllers that do not allow changing parameter configurations in the

field are unacceptable.

B. Controllers or transmitters without the possibility to access data through an internet

browser enabled device and cannot present real-time instrument diagnostics are not

acceptable.

System Descriptions

1. Design requirements

A. Includes capability to actively monitor all internal components and present diagnostics on

the overall health of connected sensors and time to next required maintenance, reducing

user risk.

i. Ability to see and be notified of upcoming and past due maintenance.

B. Includes capability to provide real-time alerts when sensor issues occur with built in

workflows with step-by-step guidance to perform calibration and maintenance tasks,

reducing user risk.

C. Includes ability for cellular network coverage OR Wi-Fi connection OR a LAN

connection.

IFB 26-027 HVAC Replacements for Park Forest

Page 3 of 14

D. Supports advanced communication protocols, including Profibus DPV1, Modbus TCP/IP,

Profinet IO, and Ethernet IP.

E. Provides capability to view all connected plant measurements, alerts, calibration, and

maintenance status in real time on any internet browser capable device.

i. Connects with overall data system for real time graphics of both online and

laboratory data for a full picture of functional plant operational capability.

F. Controller designed to be used in indoor or outdoor locations.

2. Performance Requirements

A. The controller accepts digital sensors in any combination to measure the following water

quality parameters:

i. pH/ORP

ii. Conductivity

iii. Dissolved Oxygen

iv. UV Organics

v. Sludge level

vi. Ammonium

vii. Ammonia

viii. Nitrate

ix. Combination of Ammonium and Nitrate

x. Total suspended solids

xi. Orthophosphate

xii. Turbidity

xiii. Free/total Chlorine

xiv. Combination Chlorine HOCl /Chlorine+Acid / Total free chlorine

xv. Ozone in water

xvi. Chlorine Dioxide

xvii. Oil in Water

xviii. Nitrite

3. Environmental Requirements

A. Operational Criteria

i. Operating Temperature: –20 to 45 °C (–4 to 113 °F)

ii. Storage temperature: –20 to 70 °C (–4 to 158 °F)

iii. Relative humidity: 0 to 95%, non-condensing

iv. Altitude ≤3000m (6,562 ft.)

4. Certifications

A. EMC: CE approved (with all sensor types). Listed for use in general locations to UL and

CSA safety standards by ETL (with all sensor types).

B. Safety: General Purpose UL/CSA 61010-1 with cETLus safety mark

C. Possibility for Hazardous Locations Use: Class 1 Div 2

IFB 26-027 HVAC Replacements for Park Forest

Page 4 of 14

5. Warranty

A. Warranted for 1 year from date of shipment from manufacturer defects.

6. Unscheduled Maintenance

A. Clean controller face

B. Calibrate mA output signals

PART 2 - INSTRUMENT CONTROLLER PRODUCTS

1. Equipment shall be:

A. Hach Company, Loveland, Colorado and Hach Lange GmbH, Berlin, Germany

i. SC4500 Controller

B. Or Approved Equivalent

2. Manufactured Unit

A. Microprocessor-based sensor controller.

B. Change digital sensors connected to the controller by unplugging and plugging in sensors

as necessary.

C. Modules for connection of Analogue sensors for pH, ORP or Conductivity

D. The controller is available with the following power requirements:

i. AC powered: 100–240 VAC ±10%, 50/60 Hz; 1 A (28 W sensor load)

ii. DC powered: 24 VDC +15% –20%; 2.5 A (20 W sensor load)

E. The controller uses a menu-driven operation system.

F. The controller is equipped with a real-time clock.

G. The controller is equipped with two security levels.

H. The controller shall have worded operation menus in 24 languages.

I. The controller is equipped with a USB reader for data download and controller software

upload.

J. High voltage:

i. Two relays (SPDT);

ii. Wire gauge: 0.75 to 1.5 mm2 (18 to 16 AWG)

iii. AC controller:

Maximum switching voltage: 100–240 VAC

Maximum switching current: 5 A Resistive/1 A Pilot Duty

Maximum switching power: 1200 VA Resistive/360 VA Pilot

iv. Duty DC controller

Maximum switching voltage: 30 VAC or 42 VDC

Maximum switching current: 4 A Resistive/1 A Pilot Duty

Maximum switching power: 125 W Resistive/28 W Pilot Duty

K. Five analogs 0/4-20 mA outputs are provided with a maximum impedance of 500 ohms.

i. The controller can be equipped with five 4-20 mA outputs with a maximum

impedance of 500 ohms.

IFB 26-027 HVAC Replacements for Park Forest

Page 5 of 14

This page summarizes the opportunity, including an overview and a preview of the attached documents.

* Disclaimer: This website provides information about bids, requests for proposals (RFPs), or requests for qualifications (RFQs) for convenience only and does not serve as an official public notice. Individuals who wish to respond to or inquire about bids, RFPs, or RFQs should contact the relevant government department directly.

Sign-up for a Free Trial, Government Bid Alerts

With Free Trial, you can:

You will have a full access to bids, website, and receive daily bid report via email and web.

Try One Week FREE Now

Purchase of Ammonia Sensors for CC Williams WWTP

Attachment Preview

Sign-up for a Free Trial, Government Bid Alerts

See Also