S128
1:128 dosing for process flows up to 10 gpm
S128 Series
Activated by a dry contact pulse water meter, the S128 automatically injects solution into the water line proportional to the system water flow at a ratio of 1 ounce of solution to 128 ounces of process water. As the pump registers dry contacts, it delivers the precise ratio.
The pump has three speeds to automatically adjust the injection rate when the water system flow rate increases or decreases. This flow response design allows the pump to evenly and proportionally inject solutions especially at low flow rates.
Features
- Potentiometer: Prime, 1 PPG, 1 PPL, 10 PPG, Reset Tube Timer, Standby
- Output Relays: Signal Repeater Leak Detect, Drive Fault, Low Level
- LED Indicators: Leak/Fault, Overrun, Change/Level, Power/Standby
- Clear cover on control panel for moisture protection
- Enclosed housing with NEMA 4X rating
Built-in Signal Repeater Relay
The built-in signal repeater relay repeats the pulse signal from the water meter to another pump or house controller. If using a meter to register water consumption to the house controller, an additional meter is not required to activate the pump.
Tube Change Timer
Set the Tube Change Timer DIP switches with the number of hours you want the pump to run before the CHANGE LED is activated. When the set time is reached the change/level LED is lit solid red. The standby setting allows the tube replacement without disconnecting the pump.
Leak Detect Setting and Output Relay
Set the pump’s DIP switch to stop or to continue to run when a leak is detected. Set the optional output relay to notify another device if a leak occurs.
Signal Inputs
The pump has three dedicated inputs to receive a signal from another device.
PULSE Receives a pulse from a dry contact water meter to activate the pump.
STANDBY Remotely start or stop the pump when a dry contact input is sent to the pump. Replace tube without disconnecting pump
LEVEL Input from a fluid level device indicates a low level in the solution tank. The Level Input may be used with the low level output relay.
Flow Rate Outputs
60 psi (4.1 bar) max.
| Pump Prefix | Pump Tube | Ounces per Minute | Milliliters per Minute |
|---|---|---|---|
| Approximate Output @ 50/60Hz | |||
| S4M8X | 8X | 10.0 | 295.7 |
Notice: The information within the charts above is solely intended for use as a guide. The output data is an approximation based on pumping water under a controlled testing environment. Many variables can affect the output of the pump. Stenner Pump Company recommends that all metering pumps undergo field calibration by means of analytical testing to confirm their outputs
Technical Data
Specifications
Fixed rate, interfaces with water meter
+/- 2%
60 psi (4.1 bar)
104°F (40°C)
25 ft (7.6 m) vertical lift, based on water
Brushless DC motor
45
Continuous
1500 Centipoise
120V 60Hz 1PH (0.6)
120V 60Hz SJTOWA
120V 60Hz 5-15P
6 ft (1.8 m)
Indoor / Outdoor
Materials of Construction
Polycarbonate
Santoprene®* (FDA approved)
Ceramic ball (FDA approved); Tantalum spring; FKM seat & O-ring OR
Ceramic ball (FDA approved); Stainless steel spring; EPDM seat; Santoprene®* O ring
Polyethylene
Oil impregnated bronze
Polyethylene (FDA approved)
PVC or Polypropylene (both NSF listed)
PVC or Polypropylene (both NSF listed)
PVC or Polypropylene (both NSF listed); ceramic weight
Stainless steel
Stainless steel; PVC
Santoprene®*
PVC
Hastelloy®††; Stainless steel
Refer to the chemical resistance guide to determine the compatibility of the wetted components with the solution you want to pump or Contact Us.
* Santoprene® is a registered trademark of Celanese International Corporation.
†† Hastelloy® is a registered trademark of Haynes International, Inc
Pump Dimensions

Agency Listings

Box Dimensions
14 x 9 x 10 in. (35 x 23 x 24 cm)
Shipping Weight
10 lbs (4.5 kg)
Parts
S4 Tube Housing
S4 Roller Assembly
Pump Tube
Refer to Pump Tubes page
S4 Tube Housing Cover
Thumb Screws
Key Features
-
Evenly injects especially at low flows
-
Activate multiple pumps with one meter
-
Leak detection and optional relay
-
LED indicators
-
Totally enclosed housing
-
Simple tube replacement
-
2 year warranty
Item Numbers
Create here