Model LDPM Digital Differential Pressure Manometer

11 Selectable Pressure Units, 3% FS Accuracy

The Model LDPM Digital Differential Pressure Manometer is a versatile, handheld, battery operated manometer that can measure up to 55.4" w.c. (140.6 cm w.c.). It is able to measure either positive, negative, or differential pressure with a 3% FS accuracy. Users can select from 11 common English and metric pressure units.

Calibration Option available under Accessories.

Product Applications

  • Field calibration of other instruments
  • Monitoring or troubleshooting HVAC systems

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Order
Ships: Consult Factory
Price: $49.50
Digital differential pressure manometer, range ± 55.4" w.c., 3% FS accuracy Consult Factory* $49.50 Order


Air and non-combustible non-corrosive gases only.
Wetted Materials:
Consult factory.
3% FS.
±0.2% FS.
Pressure Hysteresis:
±0.29% FS.
Pressure Limits:
10 psi.
Response Time:
0.5 s typ.
Temperature Limits:
Operating: 32 to 122°F (0 to 50°C); Storage: 14 to 140°F (-1 to 60°C).
Dual-line backlit LCD.
See chart on catalog page.
Power Requirements:
9 V alkaline battery, included, user replaceable.
5.82 oz (165 g).
Process Connections:
Two barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) ID tubing.
Agency Approvals:


  • Provided with carrying case and tubing for ease of use
  • Able to store maximum, minimum, and average readings over a period of time
  • Auto power off function to conserve battery life
  • Instant selection of 11 common English and metric pressure units


Model Number Description Usually Ships* Price Order
NISTCAL-MD NIST traceable calibration certificate for digital manometers. NOTE: EQUAL CERTS WILL BE CHARGED PER UNITS PURCHASED. Less Than 1 Week $113.00 Order

Product Literature


Catalog Pages

Product Data Sheet



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