PMM-32-1
Magnetron Vacuum Gauge
Description
The PMM-32-1 gauge transducer is a magnetic electric discharge sensor with a cold cathode of the inverse-magnetron type. Designed to convert a pressure signal into an electrical signal in the range from 1x10-7 to 1.3 Pa (from 7.5x10-10 to 1x10-2 mm Hg).
It is used as a sensor in vacuum gauges VMB-8, VMTsB-12 and VMB-14 in the power supply modes of these vacuum gauges.
PMM-32-1: identification and purpose
PMM-32-1 is classified as a Magnetron Vacuum Gauge and measures low residual pressure through discharge current in electric and magnetic fields. Select it by the complete designation, series, execution, marking and approved documentation. Similar lettering, housing or connector geometry does not establish identical operating data.
This historical category contains several types of transducing devices. PT, PO and PTS products relate to electrical-power conversion, while PMI, PMT and PMM designations identify vacuum-gauge transducers. Each page therefore follows the actual product function rather than the broad category name. A suffix, series number or extra letter can indicate a materially different circuit, pressure range, rating or interface.
Function and operating circuit
The item measures low residual pressure through discharge current in electric and magnetic fields. Exact input and output conditions depend on the execution. For a power converter, verify voltage, current type, frequency, phase arrangement, rated output, connectors and cooling. For a vacuum transducer, verify the measurement principle, pressure range, operating mode, vacuum connection and compatible measuring instrument.
Numerical values retained from the original catalogue record appear in Technical Details and must be compared with the passport for the actual unit. An aircraft platform or installation system is not assigned by analogy when a reliable source is unavailable.
Selection and compatibility checks
Before replacement, compare the primary and alternative designations, series, input and output ratings, dimensions, mass, connectors, mounting, cooling and documented environmental limits. For a vacuum sensor, additionally compare the conversion constant, emission current or heater resistance where the passport specifies those values.
Related members of one family may use different voltage, frequency, power, pressure range, mounting interface or purpose. The related links below support catalogue navigation and do not establish interchangeability. General technical background is available under Magnetron Vacuum Gauge.
Incoming inspection and installation
Check the marking and supporting records, housing, connectors, terminals, vacuum fitting, mounting points, seals and any evidence of overheating, impact or corrosion as applicable. Bench testing must follow the documentation for the exact execution; an improvised test voltage or vacuum regime can damage the product.
Install the unit only in the intended circuit with the documented polarity, supply mode, load, cooling and safety provisions. After installation, complete the prescribed functional check. External integrity alone does not demonstrate serviceability or calibration.
Related catalogue positions
Functionally related catalogue products include PE-11M, PO-750A-2S, PTS-800BM, PMI-10-2. They are selected by actual type and family for navigation and do not imply compatibility. More positions are available in the Power Transducers category.
Enquiry information
An enquiry for PMM-32-1 should state the exact designation, quantity, required condition, marking photograph, delivery scope and required documents. When available, include the designation of the equipment and item being replaced. Price, actual availability, lead time and condition of a specific unit are confirmed separately.
Technical details
Product Type: Magnetron Vacuum Gauge
Primary Designation: PMM-32-1
Alternative Designations: PMM-32-1; PMM 32 1; ПММ-32-1
Function: measures low residual pressure through discharge current in electric and magnetic fields
Selection Basis: Exact designation, execution, marking and documentation for the specific equipment
Application: Only as supported by the passport, illustrated parts catalogue or approved installation documentation
Interchangeability: Not established by a related designation, matching base, housing or appearance alone
Inspection: Verify electrical ratings, contacts or connector, mounting, construction and required operating mode
Enquiry Data: Designation, quantity, condition, marking photograph, delivery scope and required documents
Documentation: Product passport and approved operating or repair documentation
Category: Power Transducers
All specificationsCollapse specifications
Retained Technical Data:
Product Type: Magnetron Vacuum Gauge
Primary Designation: PMM-32-1
Alternative Designations: PMM-32-1; PMM 32 1; ПММ-32-1
Function: measures low residual pressure through discharge current in electric and magnetic fields
Selection Basis: Exact designation, execution, marking and documentation for the specific equipment
Application: Only as supported by the passport, illustrated parts catalogue or approved installation documentation
Interchangeability: Not established by a related designation, matching base, housing or appearance alone
Inspection: Verify electrical ratings, contacts or connector, mounting, construction and required operating mode
Enquiry Data: Designation, quantity, condition, marking photograph, delivery scope and required documents
Documentation: Product passport and approved operating or repair documentation
Category: Power Transducers
Retained Technical Data:
1. Working pressure range Torr (Pa) 1×10-2 – 1×10-9 (1.3 – 1×10-7);
2. Anode voltage 2500 ± 60V;
3. Ballast resistance in the anode-converter circuit 1.1 ± 0.011 MΩ;
4. Magnetic induction in the center of the gap of the magnetic system (cathode) 0.11 ± 0.005T;
5. Insulation resistance of the converter between the cathode bushing (ion collector)
and the case, as well as between the anode inlet and the case ≥ 1×1011 Ohm;
6. Relative error of pressure measurement at a temperature of 10 – 35 оС% from -25 to +50 in the range 1×10-7 – 1.3×10-1 Pa (7.5×10-10 – 1×10-3 Torr); from -40 to +80 in the range of 1.3×10-1 – 1.3 Pa (1×10-3 – 1×10-2 Torr);
7. Pressure in the vacuum system during degassing of the vacuum system ≤ 1.3×10-2 (≤ 1×10-4) Pa (Torr);
8. The temperature of the converter warming up during degassing of the vacuum system ≤ (350 ± 10) оС;
9. Connection of the converter to the vacuum unit flange connection DN50 7.150.004 with a copper gasket;
10. Overall dimensions with casing and cover ≤ 90 × 123 mm;
11. Overall dimensions without casing and cover ≤ 90 × 85mm;
12. Weight of the transducer with casing and cover ≤ 1.05 kg;
13. Weight of the transducer without casing and cover ≤ 0.85kg.
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
Payment & delivery terms