The Miljoco-Weiss NF401-200-4L is a Weiss stainless steel case pressure gauge with a 4″ dial, a 0-200 psi pressure range and a 1/4″ NPT lower connection.
Where vibration, corrosion and pulsating conditions exist, the Weiss line of stainless steel cased industrial pressure gauges is designed for severe applications, with ranges from vacuum to 15,000 psi across the line.
Series NF401 uses copper alloy internals in a 4″ 304 stainless steel case in dry construction.
Specifications on this page are taken from the Weiss Stainless Steel Case Gauges catalog (SSG-9/13). Verified 2026-09-11.
Markets
The manufacturer lists this series for the following applications.
- Agricultural equipment
- Hydraulic systems
- Oil field equipment
- Pumps
- Compressors
- Car wash systems
Warranty
Miljoco-Weiss warrants its products to be free from material defects in material and workmanship for 12 months from the date of shipment, or such other period as provided in the product documentation, per the published Miljoco-Weiss terms and conditions of sale (Section 15, Limited Warranty).
Key Features
4″ 304 stainless steel case
4″ type 304 stainless steel case with polished stainless steel bayonet ring.
Copper alloy wetted parts
Phosphor bronze Bourdon tube with brass with threaded restrictor socket.
Accuracy 1% of span
NF401 is published at 1% of span.
Clear acrylic window
Clear acrylic window over a white aluminum with black and red markings (psi and kpa) dial.
Technical Specifications
| Model | NF401-200-4L |
| Type | Dry construction stainless steel case pressure gauge |
| Ordering Code | Series NF401, range code 200, connection code 4L |
| Range | 0-200 psi |
| Graduations | Figure interval 20 psi, minor graduation 2 psi |
| Dial Size | 4″ |
| Case and Ring | 4″ type 304 stainless steel case with polished stainless steel bayonet ring |
| Dial | White aluminum with black and red markings (psi and kPa) |
| Window | Clear acrylic |
| Bourdon Tube | Phosphor bronze |
| Socket | Brass with threaded restrictor |
| Movement | Brass rotary type with bushings |
| Pointer | Black anodized aluminum, adjustable |
| Accuracy | 1% of span |
| Connection | 1/4″ NPT lower |
| Panel Mounting Versions (separate series) | back flange Series NF401BF |
Documentation
Related Products
Frequently Asked Questions
What range does the NF401-200-4L read?
0-200 psi. Figure interval 20 psi, minor graduation 2 psi.
What is the process connection?
1/4″ NPT lower.
How accurate is it?
The published accuracy for this series is 1% of span.
What are the wetted materials?
Bourdon Tube: Phosphor bronze; Socket: Brass with threaded restrictor.
Manufacturer Warranty
Miljoco-Weiss warrants this product to be free from material defects in material and workmanship for 12 months from date of shipment, per the published Miljoco-Weiss terms and conditions of sale.
Warranty service requires written notice of the defect within seven days of discovery. Remedy is repair, replacement or credit at the manufacturer's discretion. Normal wear, corrosion, misuse and unauthorized modification are excluded.
- Type:
- Pressure Gauge
- Series:
- NF401
- Dial Size:
- 4 in
- Pressure Range:
- 0-200 psi
- Range Type:
- Pressure
- Connection Size:
- 1/4 in
- Connection Location:
- Lower
- Case Material:
- Stainless Steel
- Wetted Material:
- Copper Alloy
- Fill:
- Dry
- Accuracy:
- Plus or Minus 1 Percent
